| Camel
Temporal range:
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| Dromedary (Camelus dromedarius) |
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| Bactrian camel (Camelus bactrianus) |
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| Scientific classification |
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Artiodactyla |
| Family: | Camelidae |
| Tribe: | Camelini |
| Genus: | Camelus Linnaeus, 1758 |
| Type species | |
| Camelus dromedarius [6]
Linnaeus, 1758
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| Species | |
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| Distribution of camels worldwide | |
| Synonyms | |
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List
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A camel (from Latin: camelus and Ancient Greek: κάμηλος (kamēlos) from Ancient Semitic: gāmāl[7][8]) is an even-toed ungulate in the genus Camelus that bears distinctive fatty deposits known as "humps" on its back. Camels have long been domesticated and, as livestock, they provide food (camel milk and meat) and textiles (fiber and felt from camel hair). Camels are working animals especially suited to their desert habitat and are a vital means of transport for passengers and cargo. There are three surviving species of camel. The one-humped dromedary makes up 94% of the world's camel population, and the two-humped Bactrian camel makes up 6%. The wild Bactrian camel is a distinct species that is not ancestral to the domestic Bactrian camel, and is now critically endangered, with fewer than 1,000 individuals.
The word camel is also used informally in a wider sense, where the more correct term is "camelid", to include all seven species of the family Camelidae: the true camels (the above three species), along with the "New World" camelids: the llama, the alpaca, the guanaco, and the vicuña, which belong to the separate tribe Lamini.[9] Camelids originated in North America during the Eocene, with the ancestor of modern camels, Paracamelus, migrating across the Bering land bridge into Asia during the late Miocene, around 6 million years ago.
Three species are extant:[10][11]
| Common name | Scientific name and subspecies | Range | Size and ecology | IUCN status and estimated population |
|---|---|---|---|---|
| Bactrian camel
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Camelus bactrianus Linnaeus, 1758 |
Domesticated; Central Asia, including the historical region of Bactria and Turkey. |
Size: Habitat: Diet: |
NE
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| Dromedary / Arabian camel
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Camelus dromedarius Linnaeus, 1758 |
Domesticated; the Middle East, Sahara Desert, and South Asia; introduced to Australia |
Size: Habitat: Diet: |
NE
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| Wild Bactrian camel
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Camelus ferus Przewalski, 1878 |
Remote areas of northwest China and Mongolia |
Size: Habitat: Diet: |
EN
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The average life expectancy of a camel is 40 to 50 years.[12] A full-grown adult dromedary camel stands 1.85 m (6 ft 1 in) at the shoulder and 2.15 m (7 ft 1 in) at the hump.[13] Bactrian camels can be a foot taller. Camels can run at up to 65 km/h (40 mph) in short bursts and sustain speeds of up to 40 km/h (25 mph).[14] Bactrian camels weigh 300 to 1,000 kg (660 to 2,200 lb) and dromedaries 300 to 600 kg (660 to 1,320 lb). The widening toes on a camel's hoof provide supplemental grip for varying soil sediments.[15]
The male dromedary camel has an organ called a dulla in his throat, a large, inflatable sac that he extrudes from his mouth when in rut to assert dominance and attract females. It resembles a long, swollen, pink tongue hanging out of the side of the camel's mouth.[16] Camels mate by having both male and female sitting on the ground, with the male mounting from behind.[17] The male usually ejaculates three or four times within a single mating session.[18] Camelids are the only ungulates to mate in a sitting position.[19]
It is a common myth that a camel stores water in its hump,[20] but the humps in fact are reservoirs of fatty tissue, which can be used as a reserve source of calories, not water. When this tissue is metabolized, it yields a greater mass of water than that of the fat processed. This fat metabolization, while releasing energy, causes water to evaporate from the lungs during respiration (as oxygen is required for the metabolic process): overall, there is a net decrease in water.[21][22]
Camels have a series of physiological adaptations that allow them to withstand long periods of time without any external source of water.[24] The dromedary camel can drink as seldom as once every 10 days even under very hot conditions, and can lose up to 30% of its body mass due to dehydration.[25] They can drink as much as 30 imperial gallons (140 litres) at a time[26] but this is stored in the animal's bloodstream, not, as popularly believed, in its humps.[20]
Unlike other mammals, camels' red blood cells are oval rather than circular in shape. This facilitates the flow of red blood cells during dehydration[27] and makes them better at withstanding high osmotic variation without rupturing when drinking large amounts of water.[28][29]
Camels are able to withstand changes in body temperature and water consumption that would kill most other mammals. Their temperature ranges from 34 °C (93 °F) at dawn and steadily increases to 40 °C (104 °F) by sunset, before they cool off at night again.[24] In general, to compare between camels and the other livestock, camels lose only 1.3 liters of fluid intake every day while the other livestock lose 20 to 40 liters per day.[30] Maintaining the brain temperature within certain limits is critical for animals; to assist this, camels have a rete mirabile, a complex of arteries and veins lying very close to each other which utilizes countercurrent blood flow to cool blood flowing to the brain.[31] Camels rarely sweat, even when ambient temperatures reach 49 °C (120 °F).[32] Any sweat that does occur evaporates at the skin level rather than at the surface of their coat; the heat of vaporization therefore comes from body heat rather than ambient heat. Camels can withstand losing 25% of their body weight in water, whereas most other mammals can withstand only about 12–14% dehydration before cardiac failure results from circulatory disturbance.[29]
When the camel exhales, water vapor becomes trapped in their nostrils and is reabsorbed into the body as a means to conserve water.[33] Camels eating green herbage can ingest sufficient moisture in milder conditions to maintain their bodies' hydrated state without the need for drinking.[34]
Camels have three-chambered stomachs and perform rumination as part of their digestive process, even though they are not part of the ruminant sub-order.[35]
The camel's thick coat insulates it from the intense heat radiated from desert sand; a shorn camel must sweat 50% more to avoid overheating.[36] During the summer the coat becomes lighter in color, reflecting light as well as helping avoid sunburn.[29] The camel's long legs help by keeping its body farther from the ground, which can heat up to 70 °C (158 °F).[37][38] Dromedaries have a pad of thick tissue over the sternum called the pedestal. When the animal lies down in a sternal recumbent position, the pedestal raises the body from the hot surface and allows cooling air to pass under the body.[31]
Camels' mouths have a thick leathery lining, allowing them to chew thorny desert plants. Long eyelashes and ear hairs, together with nostrils that can close, form a barrier against sand. If sand gets lodged in their eyes, they can dislodge it using their translucent third eyelid (also known as the nictitating membrane). The camels' gait and widened feet help them move without sinking into the sand.[37][39]
The kidneys and intestines of a camel are very efficient at reabsorbing water. Camels' kidneys have a 1:4 cortex to medulla ratio.[40] Thus, the medullary part of a camel's kidney occupies twice as much area as a cow's kidney. Secondly, renal corpuscles have a smaller diameter, which reduces surface area for filtration. These two major anatomical characteristics enable camels to conserve water and limit the volume of urine in extreme desert conditions.[41] Camel urine comes out as a thick syrup, and camel faeces are so dry that they do not require drying when used to fuel fires.[42][43][44][45]
The camel immune system differs from those of other mammals. Normally, the Y-shaped antibody molecules consist of two heavy (or long) chains along the length of the Y, and two light (or short) chains at each tip of the Y.[46] Camels, in addition to these, also have antibodies made of only two heavy chains, a trait that makes them smaller and more durable.[46] These "heavy-chain-only" antibodies, discovered in 1993, are thought to have developed 50 million years ago, after camelids split from ruminants and pigs.[46]
The parasite Trypanosoma evansi causes the disease surra in camels.[47]: 2
The karyotypes of different camelid species have been studied earlier by many groups,[48][49][50][51][52][53] but no agreement on chromosome nomenclature of camelids has been reached. A 2007 study flow sorted camel chromosomes, building on the fact that camels have 37 pairs of chromosomes (2n=74), and found that the karyotype consisted of one metacentric, three submetacentric, and 32 acrocentric autosomes. The Y is a small metacentric chromosome, while the X is a large metacentric chromosome.[54]
The hybrid camel, a hybrid between Bactrian and dromedary camels, has one hump, though it has an indentation 4–12 cm (1.6–4.7 in) deep that divides the front from the back. The hybrid is 2.15 m (7 ft 1 in) at the shoulder and 2.32 m (7 ft 7 in) tall at the hump. It weighs an average of 650 kg (1,430 lb) and can carry around 400 to 450 kg (880 to 990 lb), which is more than either the dromedary or Bactrian can.[55]
According to molecular data, the wild Bactrian camel (C. ferus) separated from the domestic Bactrian camel (C. bactrianus) about 1 million years ago.[56][57] New World and Old World camelids diverged about 11 million years ago.[58] In spite of this, these species can hybridize and produce viable offspring.[59] The cama is a camel-llama hybrid bred by scientists to see how closely related the parent species are.[60] Scientists collected semen from a camel via an artificial vagina and inseminated a llama after stimulating ovulation with gonadotrophin injections.[61] The cama is halfway in size between a camel and a llama and lacks a hump. It has ears intermediate between those of camels and llamas, longer legs than the llama, and partially cloven hooves.[62][63] Like the mule, camas are sterile, despite both parents having the same number of chromosomes.[61]
The earliest known camel, called Protylopus, lived in North America 40 to 50 million years ago (during the Eocene).[18] It was about the size of a rabbit and lived in the open woodlands of what is now South Dakota.[64][65] By 35 million years ago, the Poebrotherium was the size of a goat and had many more traits similar to camels and llamas.[66][67] The hoofed Stenomylus, which walked on the tips of its toes, also existed around this time, and the long-necked Aepycamelus evolved in the Miocene.[68] The split between the tribes Camelini, which contains modern camels and Lamini, modern llamas, alpacas, vicuñas, and guanacos, is estimated to have occurred over 16 million years ago.[69]
The ancestor of modern camels, Paracamelus, migrated into Eurasia from North America via Beringia during the late Miocene, between 7.5 and 6.5 million years ago.[70][71][72] During the Pleistocene, around 3 to 1 million years ago, the North American Camelidae spread to South America as part of the Great American Interchange via the newly formed Isthmus of Panama, where they gave rise to guanacos and related animals.[18][64][65] Populations of Paracamelus continued to exist in the North American Arctic into the Early Pleistocene.[71][73] This creature is estimated to have stood around nine feet (2.7 metres) tall. The Bactrian camel diverged from the dromedary about 1 million years ago, according to the fossil record.[74]
The last camel native to North America was Camelops hesternus, which vanished along with horses, short-faced bears, mammoths and mastodons, ground sloths, sabertooth cats, and many other megafauna as part of the Quaternary extinction event, coinciding with the migration of humans from Asia at the end of the Pleistocene, around 13–11,000 years ago.[75][76]
An extinct giant camel species, Camelus knoblochi roamed Asia during the Late Pleistocene, before becoming extinct around 20,000 years ago.[77]
Like horses, camels originated in North America and eventually spread across Beringia to Asia. They survived in the Old World, and eventually humans domesticated them and spread them globally. Along with many other megafauna in North America, the original wild camels were wiped out during the spread of the first indigenous peoples of the Americas from Asia into North America, 10 to 12,000 years ago; although fossils have never been associated with definitive evidence of hunting.[75][76]
Most camels surviving today are domesticated.[45][78] Although feral populations exist in Australia, India and Kazakhstan, wild camels survive only in the wild Bactrian camel population of the Gobi Desert.[12]
When humans first domesticated camels is disputed. Dromedaries may have first been domesticated by humans in Somalia or South Arabia sometime during the 3rd millennium BC, the Bactrian in central Asia around 2,500 BC,[18][79][80][81] as at Shar-i Sokhta (also known as the Burnt City), Iran.[82] A study from 2016, which genotyped and used world-wide sequencing of modern and ancient mitochondrial DNA (mtDNA), suggested that they were initially domesticated in the southeast Arabian Peninsula,[83] with the Bactrian type later being domesticated around Central Asia.[84]
Martin Heide's 2010 work on the domestication of the camel tentatively concludes that humans had domesticated the Bactrian camel by at least the middle of the third millennium somewhere east of the Zagros Mountains, with the practice then moving into Mesopotamia. Heide suggests that mentions of camels "in the patriarchal narratives may refer, at least in some places, to the Bactrian camel", while noting that the camel is not mentioned in relationship to Canaan.[85] Heide and Joris Peters reasserted that conclusion in their 2021 study on the subject.[86]
In 2009–2013, excavations in the Timna Valley by Lidar Sapir-Hen and Erez Ben-Yosef discovered what may be the earliest domestic camel bones yet found in Israel or even outside the Arabian Peninsula, dating to around 930 BC. This garnered considerable media coverage, as it is strong evidence that the stories of Abraham, Jacob, Esau, and Joseph were written after this time.[87][88]
The existence of camels in Mesopotamia and Arabia but not in Syria is not a new idea. The historian Richard Bulliet thought that although camels were occasionally mentioned in the Bible, this didn't mean that the domestic camels were common in the Holy Land at that time.[89] The archaeologist William F. Albright, writing even earlier, saw camels in the Bible as an anachronism.[90]
The official report by Sapir-Hen and Ben-Joseph says:
The introduction of the dromedary camel (Camelus dromedarius) as a pack animal to the southern Levant ... substantially facilitated trade across the vast deserts of Arabia, promoting both economic and social change (e.g., Kohler 1984; Borowski 1998: 112–116; Jasmin 2005). This ... has generated extensive discussion regarding the date of the earliest domestic camel in the southern Levant (and beyond) (e.g., Albright 1949: 207; Epstein 1971: 558–584; Bulliet 1975; Zarins 1989; Köhler-Rollefson 1993; Uerpmann and Uerpmann 2002; Jasmin 2005; 2006; Heide 2010; Rosen and Saidel 2010; Grigson 2012). Most scholars today agree that the dromedary was exploited as a pack animal sometime in the early Iron Age (not before the 12th century [BC])
and concludes:
Current data from copper smelting sites of the Arabah Valley enable us to pinpoint the introduction of domestic camels to the southern Levant more precisely based on stratigraphic contexts associated with an extensive suite of radiocarbon dates. The data indicate that this event occurred not earlier than the last third of the 10th century [BC] and most probably during this time. The coincidence of this event with a major reorganization of the copper industry of the region—attributed to the results of the campaign of Pharaoh Shoshenq I—raises the possibility that the two were connected, and that camels were introduced as part of the efforts to improve efficiency by facilitating trade.[88]
Desert tribes and Mongolian nomads use camel hair for tents, yurts, clothing, bedding and accessories. Camels have outer guard hairs and soft inner down, and the fibers may also be sorted by color and age of the animal. The guard hairs can be felted for use as waterproof coats for the herdsmen, while the softer hair is used for premium goods.[91] The fiber can be spun for use in weaving or made into yarns for hand knitting or crochet. Pure camel hair is recorded as being used for western garments from the 17th century onwards, and from the 19th century a mixture of wool and camel hair was used.[92]
By at least 1200 BC the first camel saddles had appeared, and Bactrian camels could be ridden. The first saddle was positioned to the back of the camel, and control of the Bactrian camel was exercised by means of a stick. However, between 500 and 100 BC, Bactrian camels came into military use. New saddles, which were inflexible and bent, were put over the humps and divided the rider's weight over the animal. In the seventh century BC the military Arabian saddle evolved, which again improved the saddle design slightly.[93][94]
Military forces have used camel cavalries in wars throughout Africa, the Middle East, and their use continues into the modern-day within the Border Security Force (BSF) of India. The first documented use of camel cavalries occurred in the Battle of Qarqar in 853 BC.[95][96][97] Armies have also used camels as freight animals instead of horses and mules.[98][99]
The East Roman Empire used auxiliary forces known as dromedarii, whom the Romans recruited in desert provinces.[100][101] The camels were used mostly in combat because of their ability to scare off horses at close range (horses are afraid of the camels' scent),[19] a quality famously employed by the Achaemenid Persians when fighting Lydia in the Battle of Thymbra (547 BC).[55][102][103]
The United States Army established the U.S. Camel Corps, stationed in California, in the 19th century.[19] One may still see stables at the Benicia Arsenal in Benicia, California, where they nowadays serve as the Benicia Historical Museum.[104] Though the experimental use of camels was seen as a success (John B. Floyd, Secretary of War in 1858, recommended that funds be allocated towards obtaining a thousand more camels), the outbreak of the American Civil War in 1861 saw the end of the Camel Corps: Texas became part of the Confederacy, and most of the camels were left to wander away into the desert.[99]
France created a méhariste camel corps in 1912 as part of the Armée d'Afrique in the Sahara[105] in order to exercise greater control over the camel-riding Tuareg and Arab insurgents, as previous efforts to defeat them on foot had failed.[106] The Free French Camel Corps fought during World War II, and camel-mounted units remained in service until the end of French rule over Algeria in 1962.[107]
In 1916, the British created the Imperial Camel Corps. It was originally used to fight the Senussi, but was later used in the Sinai and Palestine Campaign in World War I. The Imperial Camel Corps comprised infantrymen mounted on camels for movement across desert, though they dismounted at battle sites and fought on foot. After July 1918, the Corps began to become run down, receiving no new reinforcements, and was formally disbanded in 1919.[108]
In World War I, the British Army also created the Egyptian Camel Transport Corps, which consisted of a group of Egyptian camel drivers and their camels. The Corps supported British war operations in Sinai, Palestine, and Syria by transporting supplies to the troops.[109][110][111]
The Somaliland Camel Corps was created by colonial authorities in British Somaliland in 1912; it was disbanded in 1944.[112]
Bactrian camels were used by Romanian forces during World War II in the Caucasian region.[113] At the same period the Soviet units operating around Astrakhan in 1942 adopted local camels as draft animals due to shortage of trucks and horses, and kept them even after moving out of the area. Despite severe losses, some of these camels ended up as far west as to Berlin itself.[114]
The Bikaner Camel Corps of British India fought alongside the British Indian Army in World Wars I and II.[115]
The Tropas Nómadas (Nomad Troops) were an auxiliary regiment of Sahrawi tribesmen serving in the colonial army in Spanish Sahara (today Western Sahara). Operational from the 1930s until the end of the Spanish presence in the territory in 1975, the Tropas Nómadas were equipped with small arms and led by Spanish officers. The unit guarded outposts and sometimes conducted patrols on camelback.[116][117]
The annual King Abdulaziz Camel Festival is held in Saudi Arabia. In addition to camel racing and camel milk tasting, the festival holds a camel "beauty pageant" with prize money of $57m (£40m). In 2018, 12 camels were disqualified from the beauty contest after their owners were found to have injected them with botox.[118] In a similar incident in 2021, over 40 camels were disqualified.[119]
Camel meat and milk are foods that are found in many cuisines, typically in Middle Eastern, North African and some Australian cuisines.[120][121][122][123] Camels provide food in the form of meat and milk.[124]
Camel milk is a staple food of desert nomad tribes and is sometimes considered a meal itself; a nomad can live on only camel milk for almost a month.[19][42][125][126]
Camel milk can readily be made into yogurt, but can only be made into butter if it is soured first, churned, and a clarifying agent is then added.[19] Until recently, camel milk could not be made into camel cheese because rennet was unable to coagulate the milk proteins to allow the collection of curds.[127] Developing less wasteful uses of the milk, the FAO commissioned Professor J.P. Ramet of the École Nationale Supérieure d'Agronomie et des Industries Alimentaires, who was able to produce curdling by the addition of calcium phosphate and vegetable rennet in the 1990s.[128] The cheese produced from this process has low levels of cholesterol and is easy to digest, even for the lactose intolerant.[129][130]
Camel milk can also be made into ice cream.[131][132]
Approximately 3.3 million camels and camelids are slaughtered each year for meat worldwide.[133] A camel carcass can provide a substantial amount of meat. The male dromedary carcass can weigh 300–400 kg (661–882 lb), while the carcass of a male Bactrian can weigh up to 650 kg (1,433 lb). The carcass of a female dromedary weighs less than the male, ranging between 250 and 350 kg (550 and 770 lb).[18] The brisket, ribs and loin are among the preferred parts, and the hump is considered a delicacy.[134] The hump contains "white and sickly fat", which can be used to make the khli (preserved meat) of mutton, beef, or camel.[135] On the other hand, camel milk and meat are rich in protein, vitamins, glycogen, and other nutrients making them essential in the diet of many people. From chemical composition to meat quality, the dromedary camel is the preferred breed for meat production. It does well even in arid areas due to its unusual physiological behaviors and characteristics, which include tolerance to extreme temperatures, radiation from the sun, water paucity, rugged landscape and low vegetation.[136] Camel meat is reported to taste like coarse beef, but older camels can prove to be very tough,[13][18] although camel meat becomes tenderer the more it is cooked.[137]
Camel is one of the animals that can be ritually slaughtered and divided into three portions (one for the home, one for extended family/social networks, and one for those who cannot afford to slaughter an animal themselves) for the qurban of Eid al-Adha.[138][139]
The Abu Dhabi Officers' Club serves a camel burger mixed with beef or lamb fat in order to improve the texture and taste.[140] In Karachi, Pakistan, some restaurants prepare nihari from camel meat.[141] Specialist camel butchers provide expert cuts, with the hump considered the most popular.[142]
Camel meat has been eaten for centuries. It has been recorded by ancient Greek writers as an available dish at banquets in ancient Persia, usually roasted whole.[143] The Roman emperor Heliogabalus enjoyed camel's heel.[42] Camel meat is mainly eaten in certain regions, including Eritrea, Somalia, Djibouti, Saudi Arabia, Egypt, Syria, Libya, Sudan, Ethiopia, Kazakhstan, and other arid regions where alternative forms of protein may be limited or where camel meat has had a long cultural history.[18][42][134] Camel blood is also consumable, as is the case among pastoralists in northern Kenya, where camel blood is drunk with milk and acts as a key source of iron, vitamin D, salts and minerals.[18][134][144]
A 2005 report issued jointly by the Saudi Ministry of Health and the United States Centers for Disease Control and Prevention details four cases of human bubonic plague resulting from the ingestion of raw camel liver.[145]
Camel meat is also occasionally found in Australian cuisine: for example, a camel lasagna is available in Alice Springs.[143][144] Australia has exported camel meat, primarily to the Middle East but also to Europe and the US, for many years.[146] The meat is very popular among East African Australians, such as Somalis, and other Australians have also been buying it. The feral nature of the animals means they produce a different type of meat to farmed camels in other parts of the world,[121] and it is sought after because it is disease-free, and a unique genetic group. Demand is outstripping supply, and governments are being urged not to cull the camels, but redirect the cost of the cull into developing the market. Australia has seven camel dairies, which produce milk, cheese and skincare products in addition to meat.[147]
Muslims consider camel meat halal (Arabic: حلال, 'allowed'). However, according to some Islamic schools of thought, a state of impurity is brought on by the consumption of it. Consequently, these schools hold that Muslims must perform wudhu (ablution) before the next time they pray after eating camel meat.[148] Also, some Islamic schools of thought consider it haram (Arabic: حرام, 'forbidden') for a Muslim to perform Salat in places where camels lie, as it is said to be a dwelling place of the Shaytan (Arabic: شيطان, 'Devil').[148] According to Abu Yusuf (d.798), the urine of camels may be used for medical treatment if necessary, but according to Abū Ḥanīfah, the drinking of camel urine is discouraged.[149]
Islamic texts contain several stories featuring camels. In the story of the people of Thamud, the prophet Salih miraculously brings forth a naqat (Arabic: ناقة, 'milch-camel') out of a rock. After Muhammad migrated from Mecca to Medina (the Hijrah), he allowed his she-camel to roam there; the location where the camel stopped to rest determined the location where he would build his house in Medina.[150]
According to Jewish tradition, camel meat and milk are not kosher.[151] Camels possess only one of the two kosher criteria; although they chew their cud, they do not have cloven hooves: "But these you shall not eat among those that bring up the cud and those that have a cloven hoof: the camel, because it brings up its cud, but does not have a [completely] cloven hoof; it is unclean for you."[152]
The Palestinian Muslim Makhamara clan in Yatta, who claim descent from Jews, reportedly avoid eating camel meat, a practice cited as evidence of their Jewish origins.[153][154]
What may be the oldest carvings of camels were discovered in 2018 in Saudi Arabia. They were analysed by researchers from several scientific disciplines and, in 2021, were estimated to be 7,000 to 8,000 years old.[155] The dating of rock art is made difficult by the lack of organic material in the carvings that may be tested, so the researchers attempting to date them tested animal bones found associated with the carvings, assessed erosion patterns, and analysed tool marks in order to determine a correct date for the creation of the sculptures. This Neolithic dating would make the carvings significantly older than Stonehenge (5,000 years old) and the Egyptian pyramids at Giza (4,500 years old) and it predates estimates for the domestication of camels.
There are approximately 14 million camels alive as of 2010[update], with 90% being dromedaries.[156] Dromedaries alive today are domesticated animals (mostly living in the Horn of Africa, the Sahel, Maghreb, Middle East and South Asia). The Horn region alone has the largest concentration of camels in the world,[23] where the dromedaries constitute an important part of local nomadic life. They provide nomadic people in Somalia[18] and Ethiopia with milk, food, and transportation.[126][157][158][159]
Over one million dromedary camels are estimated to be feral in Australia, descended from those introduced as a method of transport in the 19th and early 20th centuries.[160] This population is growing about 8% per year;[161] it was estimated at 700,000 in 2008.[144][156][162] Representatives of the Australian government have culled more than 100,000 of the animals in part because the camels use too much of the limited resources needed by sheep farmers.[163]
A small population of introduced camels, dromedaries and Bactrians, wandered through Southwestern United States after having been imported in the 19th century as part of the U.S. Camel Corps experiment. When the project ended, they were used as draft animals in mines and escaped or were released. Twenty-five U.S. camels were bought and exported to Canada during the Cariboo Gold Rush.[99]
The Bactrian camel is, as of 2010[update], reduced to an estimated 1.4 million animals, most of which are domesticated.[45][156][164] The Wild Bactrian camel is the only truly wild (as opposed to feral) camel in the world. It is a distinct species that is not ancestral to the domestic Bactrian camel. The wild camels are critically endangered and number approximately 950, inhabiting the Gobi and Taklamakan Deserts in China and Mongolia.[165]
Notes
The male mature camel has a specialized inflatable diverticulum of the soft palate called the "Dulla". and During rutting the Dulla enlarges on filling with air from the trachea until it hangs out of the mouth of the camel and comes to resemble a pink ball. This occurs in only the one-humped camel. Copious saliva turns to foam covering the mouth as the male gurgles and makes metallic sounds. [6 cites to 5 references omitted]
Both the dromedary (the seven-humped camel of Arabia) and the Bactrian camel (the two-humped camel of Central Asia) had been domesticated since before 2000 BC.
As has already been mentioned, this type of utilization [camels pulling wagons] goes back to the earliest known period of two-humped camel domestication in the third millennium B.C.—Note that Bulliet has many more references to early use of camels
The camel was acclimatized in Egypt long before the time of Christ and was subsequently adopted by the Berbers of the desert, who used camel cavalry to fight the Romans. The Berbers spread the use of the camel across the Sahara.
Other trials of the camel were made in 1859 by Major D. H. Vinton, who used twenty-four of them in carrying burdens for a surveying party...All in all, he concluded, the camel was much superior to the mule.
Nevertheless the military prowess of desert peoples impressed the Romans, who recruited large numbers as auxiliary cavalry and archers. In addition to providing the Roman Army with its best archers, the Easterners (largely Arabs but generally known as 'Syrians') served as Rome's most effective dromedarii or camel-mounted troops.
He collected together all the camels that had come in the train of his army to carry the provisions and the baggage, and taking off their loads, he mounted riders upon them accoutred as horsemen. These he commanded to advance in front of his other troops against the Lydian horse; behind them were to follow the foot soldiers, and last of all the cavalry. When his arrangements were complete, he gave his troops orders to slay all the other Lydians who came in their way without mercy, but to spare Croesus and not kill him, even if he should be seized and offer resistance. The reason why Cyrus opposed his camels to the enemy's horse was because the horse has a natural dread of the camel, and cannot abide either the sight or the smell of that animal. By this stratagem he hoped to make Croesus's horse useless to him, the horse being what he chiefly depended on for victory. The two armies then joined battle, and immediately the Lydian war-horses, seeing and smelling the camels, turned round and galloped off; and so it came to pass that all Croesus's hopes withered away.
A great deal of the work of supplying the troops on both fronts has been done by the Camel Transport Corps
As evening approaches we are offered camel meat boats, dumplings stuffed with a finely chopped mixture of meat and vegetables, followed by camel milk tea and finally, warm fresh camel's milk to aid digestion and help us sleep.
He cut the pieces very small and cooked them for a long time. I decided to try something a bit different the following night and cut the pieces a bit bigger and cooked them for less time, as I like my meat rarer than he does. This was a bad idea. It seems that the more you cook camel, the more tender it becomes. So we had what amounted to two pounds or more of rubber for dinner that night.
As the meat can be dry, however, the Abu Dhabi Officer's Club, for one, serves camel burger with beef or lamb fat mixed in, improving texture and taste.
Narrated Al-Bara' ibn Azib: The Messenger of Allah (peace_be_upon_him) was asked about performing ablution after eating the flesh of the camel. He replied: Perform ablution, after eating it. He was asked about performing ablution after eating meat. He replied: Do not perform ablution after eating it. He was asked about saying prayer in places where the camels lie down. He replied: Do not offer prayer in places where the camels lie down. These are the places of Satan. He was asked about saying prayer in the sheepfolds. He replied: You may offer prayer in such places; these are the places of blessing.
A four-year drought is threatening the lives of Somali nomads, and those of the camel herds on which they depend for transportation and milk
Somali pastoralists are a camel community...There is no other community in the world where the camel plays such a pivotal role in the local economy and culture as in the Somali community. According to the UN Food and Agriculture Organization (FAO, 1979) estimates, there are approximately 15 million dromedary camels in the worldPlain text version. Archived 2013-01-02 at the Wayback Machine
Bibliography
Further reading
Tourism in Dubai is a major part of the economy of Dubai. Dubai was the third most visited city in the world in 2023 with 17 million international visitors according to Euromonitor International.[1][2] Dubai hosts more than 800 hotels with more than 150,000 rooms.[3][4]
The discovery of oil in 1966 kick-started the development of present Dubai, however Sheikh Hamad bin Maktoum (ruler from 1958 till 1990) realised one day Dubai would run out of oil and started building an economy that would outlast it.[5] A quote commonly attributed to Sheikh Rashid reflected his concern that Dubai's oil, which was discovered in 1966 and which began production in 1969, would run out within a few generations. Sheikh Rashid stated "My grandfather rode a camel, my father rode a camel, I drive a Mercedes, my son drives a Land Rover, his son will drive a Land Rover, but his son will ride a camel".[6] Sheikh Rashid realized early he needed to diversify the emirate of Dubai's economy by building on the city's trading history and therefore he set out to establish Dubai as the region's trade and service hub. By 1979, he was successful in establishing the Jebel Ali Port, which became the logical shipping centre for the entire United Arab Emirates and the world's largest man-made port. He also upgraded Dubai International Airport and built the Dubai World Trade Centre, which was then the tallest building in the Middle East. By the end of the 1970s, the stage was set for the diversification of Dubai's economy away from oil and into other areas such as tourism.[7]
In 1989 the Dubai Commerce and Tourism Promotion Board was established, to promote Dubai as a luxury destination for the up-tier market and influential business sectors. In January 1997, it was replaced with the Department of Tourism and Commerce Marketing (DTCM).[8]
In May 2013, the government of Dubai launched the Dubai Tourism Strategy 2020, with the key objective to attract 20 million visitors a year by 2020 and making Dubai a first choice destination for international leisure travellers as well as business travellers.[9] In 2018, the strategy was expanded by setting new goals of attracting 21-23 million visitors in 2022 and 23-25 million visitors by 2025.[10] The key objectives from 2013 and 2018 were not met due to the COVID-19 pandemic.
The need to maintain its tourism industry has hampered Dubai's response to the COVID-19 pandemic.[11] Along with COVID-19 Dubai's tourism sector has also been hurt by a greater international awareness of the status of human rights in the emirate and in particular the treatment of Princess Latifa bint Mohammed Al Maktoum.[12]
In November 2022, Sheikh Mohammed bin Rashid announced a national tourism strategy until 2031. The goal of the strategy is to attract Dh 100 billion in additional tourism investments (so that the tourism sector's contribution will be Dh450bn of Dubai's GDP in 2031) and receive 40 million hotel guests in 2031. The strategy includes 25 initiatives and policies to support the development of the tourism sector in the country.[13]
In April 2025, the Dubai Department of Economy and Tourism introduced a new programme offering media training to students for promotion of tourism in the UAE. Applicants are provided with flights, luxury apartment and three months of income, along with certification from Dubai College of Tourism for posting about traveling experiences in Dubai on social media. According to Middle East Eye, this program aims to whitewash its human rights violations and war crime accusations in Sudan.[14]
Since 1982, Dubai continued to be one of the fastest growing destinations for tourists. In 2002, visitors were mainly from other Gulf Cooperation Council members which accounted for 34% of tourists, South Asia accounted for 25%, other Arab states 16%, Europe 15%, and Africa 9%. In 2003, revenue from tourism exceeded $1 billion and surpassed oil revenues to directly and indirectly account for over 17% and 28% of GDP respectively.[15]
From January to June 2019 8.36 million international tourists visited Dubai. Most of the visitors were from India (997,000) followed by Saudi Arabia (755,000) and the United Kingdom (586,000).[16]
Mastercard's Global Destination Cities Index 2019 found that tourists spend more in Dubai than in any other country. In 2018, the country topped the list for the fourth year in a row with a total spend of $30.82 billion, a 3.8% increase over 2017 ($29.70 billion). The average spend per day was $553.[17]
In 2019, Dubai attracted a total of 16.73 million tourists, which was an increase of 5.09% on the previous year. However, in 2020, the number of visitors dropped to 5.51 million due to the coronavirus pandemic.[18]
| Year | Total international visitors [19][20][21][15][22][23] |
Increase/decrease | Visitor spending ($m)[24] |
|---|---|---|---|
| 1982 | 374,400 | N/a | |
| 1990 | 632,903 | ||
| 1991 | 716,642 | ||
| 1992 | 944,350 | ||
| 1993 | 1,088,000 | ||
| 1994 | 1,239,000 | ||
| 1995 | 1,601,000 | 632.0 | |
| 1996 | 1,768,000 | 743.0 | |
| 1997 | 1,792,000 | 814.0 | |
| 1998 | 2,184,000 | 859.0 | |
| 1999 | 2,481,000 | 893.0 | |
| 2000 | 3,027,000 | 1,063.0 | |
| 2001 | 3,626,625 | 1,200.0 | |
| 2002 | 4,756,280 | 1,332.0 | |
| 2003 | 4,980,228 | 1,438.0 | |
| 2004 | 5,420,000 | 1,593.0 | |
| 2005 | 6,160,003 | 3,218.0 | |
| 2006 | 6,441,670 | 4,972.0 | |
| 2007 | 6,951,798[25][26] | 6,072.0 | |
| 2008 | 6,996,449[25] | 7,162.0 | |
| 2009 | 7,580,000[27] | 7,352.0 | |
| 2010 | 8,410,000 | 8,577.0 | |
| 2011 | 9,910,000 | 9,204.0 | |
| 2012 | 10,950,000 | 10,924.0 | |
| 2013 | 12,900,000 | 12,389.0 | |
| 2014 | 13,200,000 | 15,221.0 | |
| 2015 | 14,200,000 | 25,587.1 | |
| 2016 | 14,870,000 | 28,657.4 | |
| 2017 | 15,790,000 | 29,705.5 | |
| 2018 | 15,920,000 | 34,609.5 | |
| 2019 | 16,730,000 | 38,413.3 | |
| 2020 | 5,510,000[a] | 24,615.4 | |
| 2021 | 7,280,000[b] | ||
| 2022 | 14,360,000[28] | ||
| 2023 | 17,150,000[29] | ||
| 2024 | 18,720,000[30] |
In the last three years, Dubai saw an increase in 4 and 5 star hotels and number of rooms, but a decrease in standard hotel apartments. The total number of rooms increased by 9,098 from 2015 to 2017, an increase of 9.25%. Prior to the Expo 2020 hotels in Dubai were reducing room rates to stimulate demand as supply accelerated. Based on data of August 2019, Dubai hoteliers reported a 7.6% rise in supply against 7.4% increase in demand.[31] Average room rates stood at AED 486 in June 2019 while in the same month of 2018 average room rates were at 544 AED.[32] In July 2019, Dubai's Jumeirah Group LLC fired 500 people due to a decline in tourism. In the second quarter of 2019, hospitality sector has had the worst quarter since 2009.[33]
| 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | |
|---|---|---|---|---|---|---|---|---|---|---|
| Total 5 star hotels | 91 | 96 | 103 | 113 | 128 | 134 | 143 | 151 | 157 | |
| Total 5 star hotel rooms | 31,551 | 33,122 | 35,853 | 38,543 | 43,133 | 44,067 | 47,035 | 49,585 | 51,809 | |
| Total 4 star hotels | 106 | 112 | 122 | 146 | 158 | 161 | 181 | 189 | 194 | |
| Total 4 star hotel rooms | 21,208 | 22,990 | 25,289 | 29,908 | 33,120 | 34,905 | 40,377 | 42,505 | 43,283 | |
| Total 1-3 star hotels | 264 | 267 | 260 | 260 | 258 | 225 | 243 | 270 | 274 | |
| Total 1-3 star hotel rooms | 19,714 | 21,767 | 21,591 | 22,634 | 24,491 | 21,732 | 25,384 | 28,512 | 28,789 | |
| Total hotel apartments (deluxe/superior) | 66 | 66 | 65 | 68 | 68 | 74 | 80 | 82 | 85 | |
| Total deluxe/superior rooms | 9,641 | 9,519 | 9,786 | 10,522 | 10,520 | 11,845 | 12,606 | 13,113 | 13,842 | |
| Total hotel apartments (standard) | 150 | 140 | 131 | 129 | 129 | 117 | 108 | 112 | 111 | |
| Total standard rooms | 16,219 | 15,447 | 14,930 | 14,360 | 14,856 | 14,398 | 12,548 | 12,781 | 12,568 | |
| Total establishments | 657 | 677 | 681 | 681 | 716 | 741 | 711 | 755 | 804 | 821 |
| Total available rooms | 92,333 | 98,333 | 102,845 | 107,431 | 115,967 | 126,120 | 126,947 | 137,950 | 146,496 | 150,291 |
| Average occupancy | 79% | 77% | 78% | 78% | 76% | 75% | 54% | 67% | 73% | 77% |
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| Rank | Country | 6/2023 | 2022 |
|---|---|---|---|
| 1 | 1,223,000 | 1,842,000 | |
| 5 | 616,000 | 758,000 | |
| 4 | 555,000 | 1,043,000 | |
| 3 | 538,000 | 1,216,000 | |
| 2 | 511,000 | 1,311,000 | |
| 6 | 362,000 | 590,000 | |
| 7 | 329,000 | 422,000 | |
| 17 | 260,000 | 177,000 | |
| 10 | 196,000 | 328,000 | |
| 13 | 196,000 | 239,000 | |
| 8 | 180,000 | 364,000 | |
| 11 | 168,000 | 288,000 | |
| 12 | 152,000 | 260,000 | |
| 9 | 152,000 | 356,000 | |
| 14 | 145,000 | 234,000 | |
| 15 | 130,000 | 212,000 | |
| 19 | 125,000 | 158,000 | |
| 16 | 121,000 | 184,000 | |
| 18 | 110,000 | 158,000 | |
| 19 | 110,000 | 148,000 |
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Aspects of Dubai's old culture, while occasionally overshadowed by the boom in economic development, can be found by visiting places around the creek, which splits Dubai into two halves, Bur Dubai and Deira. The buildings lining the Bur Dubai side of the Creek provide the main flavor of the old city. Heritage Village is one of the few remaining parts of historical Dubai, containing preserved buildings. The adjoining Diving Village offers exhibits on pearl diving and fishing. The Diving Village forms part of an ambitious plan to turn the entire "Shindagha" area into a cultural city, recreating life in Dubai as it was in days gone by.
Other attractions include the Sheikh Saeed Al Maktoum House; the Dubai Museum in the restored Al Fahidi Fort, which was erected around 1799; and the Heritage Village of Hatta, situated 115 kilometers southeast of Dubai City in the heart of the rocky Hatta Mountains. The history of the village can be traced back 2000 – 3000 years. It consists of 30 buildings, each differing in size, interior layout and building materials used. Great care was taken to use the same materials as those used when originally built during the renovation such as mud, hay, sandalwood and palm fronds. The Sharia Mosque is an old mosque built in the early 19th century using the same building materials and consists of a large prayer hall, a court and courtyard, minaret and other utility rooms.[34] Other museums include the Al Ahmadiya School.
Dubai has been nicknamed the "shopping capital of the Middle East."[35][36] The city draws large numbers of shopping tourists from countries within the region and from as far as Eastern Europe, Africa and the Indian Subcontinent. Dubai is known for its souk districts. Souk is the Arabic word for market or place where any kind of goods are brought or exchanged. Traditionally, dhows from the Far East, China, Sri Lanka, and India would discharge their cargo and the goods would be bargained over in the souks adjacent to the docks.[37]
Modern shopping malls and boutiques are also found in the city. Dubai Duty Free at Dubai International Airport offers merchandise catering to the multinational passengers using Dubai International Airport. Outside of Duty Free areas and major sales, Dubai has a reputation for being one of the most expensive shopping destinations in the world.[38]
While boutiques, some electronics shops, department stores and supermarkets may operate on a fixed-price basis, most other outlets consider friendly negotiation as a way of life.
Dubai's numerous shopping centres cater for every consumer's need. Cars, clothing, jewellery, electronics, furnishing, sporting equipment and any other goods will all be likely to be under the same roof.[39]
The Dubai Shopping Festival is a month-long festival held during the month of January each year. During the festival the entire emirate becomes one massive shopping mall. Additionally, the festival brings together music shows, art exhibitions, and folk dances.[40]
The Dubai Summer Surprises (DSS) is the summer version of Dubai Shopping Festival held during June, July and August. Dubai Government launched Dubai Summer Surprises in 1998 in order to promote Dubai as a family holiday destination. DSS offers fun, entertainment, food deals and great offers on shopping.
Tourists are required to obey some Muslim religious restrictions in public even if they are not Muslim themselves, such as refraining from eating or drinking in public places in the daytime during Ramadan.[41]
Dubai has a modest dress code as part of its criminal law.[42] Sleeveless tops and short dresses are not encouraged at Dubai Mall.[43][44] Clothes are advised to be in appropriate lengths.[42]
Homosexuality is criminalized in Dubai, including for tourists. However, there is a vibrant underground gay scene in Dubai and authorities do not actively search for homosexuals to enforce the law.[45]
Most capitals and other major cities have direct flights to Dubai. More than 120 airlines operate to and from Dubai International Airport to more than 260 destinations. Dubai International Airport is the world's busiest airport by international passenger traffic.[46] Dubai is also the home base of the airline Emirates, which operates scheduled services to more than 100 destinations.
In June 2009 Emirates designated a special handling area at departures and arrivals for passengers with special needs, allowing wheelchair passengers to receive a more personalized service.[47][better source needed]
The establishment of the first cruise terminal in Dubai in 2001 and the opening of the enhanced New Dubai Cruise Terminal in February 2010 with higher handling capacity has drawn the attention of cruise line operators. Cruises to Dubai sail from: Singapore, Sydney, Athens, Dover, Venice, Cape Town, Civitavecchia, Piraeus, Alexandria, Istanbul, New York City, Southampton, Barcelona, Fort Lauderdale, Miami, Los Angeles, Mumbai, Hong Kong, Shanghai, Monte Carlo, Mombasa, Victoria, and Cairns among others.[48][better source needed]
The United Arab Emirates has a network of roads that connect major towns and villages, including a multi-lane highway between Dubai and Abu Dhabi, with access to and from the bordering countries of Saudi Arabia and Oman. Highways and main roads in Dubai and the United Arab Emirates are designated by an Emirate Route Number. Speed limits are displayed on road signs and are usually 60–80 km/h (37–50 mph) around town and 100–120 km/h (62–75 mph) elsewhere.[49][better source needed]
Dubai ranked third in the best taxi services behind Tokyo and Singapore.[50][better source needed]
Travelers entering Dubai are warned for harsh penalties regarding illicit drug use or smuggling. Authorities in Dubai use highly sensitive equipment to conduct thorough searches to find trace amount of illegal substances.[51] A senior Dubai judge was quoted on February 11, 2008, by the Dubai City News saying, "These laws help discourage anyone from carrying or using drugs. Even if the quantity of illegal drugs found on someone is 0.05 grams, they will be found guilty. The penalty is a minimum of four years. The message is clear — drugs will not be tolerated."[51]
No special immunizations are required, but tourists are encouraged to purchase appropriate medical insurance before travelling. Government immunization programs have led to recognition by a travel magazine.[47] As a latest addition to the established modern health care system, Dubai offers online health care contacts of virtually all medical doctors in Dubai.[52]
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Dubai hosts the following international championships:
A hot air balloon is a lighter-than-air aircraft consisting of a bag, called an envelope, which contains heated air. Suspended beneath is a gondola or wicker basket (in some long-distance or high-altitude balloons, a capsule), which carries passengers and a source of heat, in most cases an open flame caused by burning liquid propane. The heated air inside the envelope makes it buoyant, since it has a lower density than the colder air outside the envelope. As with all aircraft, hot air balloons cannot fly beyond the atmosphere. The envelope does not have to be sealed at the bottom, since the air inside the envelope is at about the same pressure as the surrounding air. In modern sport balloons the envelope is generally made from nylon fabric, and the inlet of the balloon (closest to the burner flame) is made from a fire-resistant material such as Nomex. Modern balloons have been made in many shapes, such as rocket ships and the shapes of various commercial products, though the traditional shape is used for most non-commercial and many commercial applications.
The hot air balloon is the first successful human-carrying flight technology. The first untethered manned hot air balloon flight in the world was performed in Paris, France, by Jean-François Pilâtre de Rozier and François Laurent d'Arlandes on November 21, 1783,[1] in a balloon created by the Montgolfier brothers.[2] Hot air balloons that can be propelled through the air rather than simply drifting with the wind are known as thermal airships.
A precursor of the hot air balloon was the sky lantern (simplified Chinese: 孔明灯; traditional Chinese: 孔明燈). Zhuge Liang of the Shu Han kingdom, during the Three Kingdoms era (220–280 CE), used these airborne lanterns for military signaling.[3] The Mongolian army studied Kongming lanterns from China and used them in the Battle of Legnica during the Mongol invasion of Poland in the 13th century.[4] This is the first time ballooning was known in the western world.
In the 18th century the Portuguese Jesuit priest Bartolomeu de Gusmão in colonial Brazil envisioned an aerial apparatus named Passarola, which was the predecessor of the hot air balloon. The Passarola was intended to serve as an air vessel in order to facilitate communication and as a strategical device.[5] In 1709 John V of Portugal decided to fund Bartolomeu de Gusmão's project following a petition made by the Jesuit priest,[6] and an unmanned demonstration was performed at Casa da Índia in the presence of John V and the queen, Maria Anna of Austria, with the Italian cardinal Michelangelo Conti, two members of the Portuguese Royal Academy of History, one Portuguese diplomat and one chronicler serving as witnesses. This event would bring some European attention to this event and this project. A later article dated on October 20, 1786, by the London Daily Universal Register would state that the inventor was able to raise himself by the use of his prototype. Also in 1709, the Portuguese Jesuit wrote Manifesto summário para os que ignoram poderse navegar pelo elemento do ar (Short Manifesto for those who are unaware that is possible to sail through the element air); he also left designs for a manned air vessel.
In the 1970s, balloonist Julian Nott hypothesized that the Nazca Lines geoglyphs' creation two millennia ago could have been guided by Nazca leaders in a balloon, possibly the earliest hot air balloon flights in human history.[7] To support this theory, in 1975 he designed and piloted the Nazca Prehistoric Balloon, claiming to have used only methods and materials available to the Pre-Inca Peruvians 1,000 years ago.[8][9]
The French brothers Joseph-Michel and Jacques-Étienne Montgolfier developed a hot-air balloon in Annonay, Ardèche, France, and demonstrated it publicly on September 19, 1783, making an unmanned flight lasting 10 minutes. After experimenting with unmanned balloons and flights with animals, the first balloon flight with humans aboard, a tethered flight, performed on or around October 15, 1783, by Jean-Francois Pilatre de Rozier, who made at least one tethered flight from the yard of the Reveillon workshop in the Faubourg Saint-Antoine. Later that same day, Pilatre de Rozier became the second human to ascend into the air, reaching an altitude of 26 m (85 ft), the length of the tether.[10][11] The first free flight with human passengers was made a few weeks later, on November 21, 1783.[2] King Louis XVI had originally decreed that condemned criminals would be the first pilots, but de Rozier, along with Marquis François d'Arlandes, petitioned successfully for the honor.[12][13][14] The first military use of a hot air balloon happened in 1794 during the battle of Fleurus, when the French used the balloon l'Entreprenant for observation.[15]
Modern hot air balloons, with an onboard heat source, were developed by Ed Yost and Jim Winker, beginning during the 1950s; their work resulted in his a first successful flight on October 22, 1960.[16] The first modern hot air balloon to be made in the United Kingdom (UK) was the Bristol Belle, built in 1967. Presently, hot air balloons are used primarily for recreation.
On November 26, 2005 Vijaypat Singhania set the world altitude record for highest hot air balloon flight, reaching 21,027 m (68,986 ft). He took off from downtown Mumbai, India, and landed 240 km (150 mi) south in Panchale.[17]
The previous record of 19,811 m (64,997 ft) had been set by Per Lindstrand on June 6, 1988, in Plano, Texas.
On January 15, 1991, Per Lindstrand (born in Sweden, but resident in the UK) and Richard Branson of the UK flew 7,671.91 km (4,767.10 mi) from Japan to Northern Canada in the “Virgin Pacific Flyer”. With a volume of 74,000 cubic meters (2.6 million cubic feet), the balloon envelope was the largest ever built for a hot air craft. Designed to fly in the trans-oceanic jet streams, the Pacific Flyer recorded the fastest ground speed for a manned balloon at 394 km/h (245 mph).
The longest duration record was set by Swiss psychiatrist Bertrand Piccard (Auguste Piccard's grandson) and Briton Brian Jones, flying in the Breitling Orbiter 3. It was the first nonstop trip around the world by balloon. The balloon left Château-d'Oex, Switzerland, on March 1, 1999, and landed at 1:02 a.m. on March 21 in the Egyptian desert 500 km (300 mi) south of Cairo. The two men exceeded distance, endurance, and time records, traveling 19 days, 21 hours, and 55 minutes.
Steve Fossett, flying solo, exceeded the record for briefest time traveling around the world on 3 July 2002 on his sixth attempt,[18] in 320 h 33 min.[19] Fedor Konyukhov flew solo round the world on his first attempt in a hybrid hot air/helium balloon from 11 to 23 July 2016[20] for a round-the world time of 268 h 20 min.[19]
A hot air balloon for manned flight uses a single-layered, fabric gas bag (lifting "envelope"), with an opening at the bottom called the mouth or throat. Attached to the envelope is a basket, or gondola, for carrying the passengers. Mounted above the basket and centered in the mouth is the "burner", which injects a flame into the envelope, heating the air within. The heater or burner is fueled by propane, a liquefied gas stored in pressure vessels, similar to high-pressure forklift cylinders.[21][22]
Modern hot air balloons are usually made of materials such as ripstop nylon or dacron (a polyester).[23]
During the manufacturing process, the material is cut into panels and sewn together, along with structural load tapes that carry the weight of the gondola or basket. The individual sections, which extend from the throat to the crown (top) of the envelope, are known as gores or gore sections. Envelopes can have as few as 4 gores or as many as 24 or more.[24]
Envelopes often have a crown ring at their very top. This is a hoop of smooth metal, usually aluminium, and approximately 30 cm (1 ft) in diameter. Vertical load tapes from the envelope are attached to the crown ring.
At the bottom of the envelope the vertical load tapes are sewn into loops that are connected to cables (one cable per load tape). These cables, often referred to as flying wires, are connected to the basket by carabiners.
The most common technique for sewing panels together is called the French felled, French fell, or double lap seam.[25][26][27][28] The two pieces of fabric are folded over on each other at their common edge, possibly with a load tape as well, and sewn together with two rows of parallel stitching. Other methods include a flat lap seam, in which the two pieces of fabric are held together simply with two rows of parallel stitching, and a zigzag, where parallel zigzag stitching holds a double lap of fabric.[27]
The fabric (or at least part of it, the top 1/3, for example) may be coated with a sealer, such as silicone or polyurethane, to make it impermeable to air.[29] It is often the degradation of this coating and the corresponding loss of impermeability that ends the effective life of an envelope, not weakening of the fabric itself. Heat, moisture, and mechanical wear-and-tear during set-up and pack-up are the primary causes of degradation. Once an envelope becomes too porous to fly, it may be retired and discarded or perhaps used as a "rag bag": cold-inflated and opened for children to run through. Products for recoating the fabric are becoming available commercially.[30]
A range of envelope sizes is available. The smallest, one-person, basket-less balloons (called "Hoppers" or "Cloudhoppers") have as little as 600 m3 (21,000 cu ft) of envelope volume;[31] for a perfect sphere the radius would be around 5 m (16 ft). At the other end of the scale, balloons used by commercial sightseeing operations may be able to carry well over two dozen people, with envelope volumes of up to 17,000 m3 (600,000 cu ft).[31] The most-used size is about 2,800 m3 (99,000 cu ft), allowing to carry 3 to 5 people.
The top of the balloon usually has a vent of some sort, enabling the pilot to release hot air to slow an ascent, start a descent, or increase the rate of descent, usually for landing. Some hot air balloons have turning vents, which are side vents that, when opened, cause the balloon to rotate. Such vents are particularly useful for balloons with rectangular baskets, to facilitate aligning the wider side of the basket for landing.[32]
The most common type of top vent is a disk-shaped flap of fabric called a parachute vent, invented by Tracy Barnes.[33] The fabric is connected around its edge to a set of "vent lines" that converge in the center. (The arrangement of fabric and lines roughly resembles a parachute—thus the name.) These "vent lines" are themselves connected to a control line that runs to the basket. A parachute vent is opened by pulling on the control line. Once the control line is released, the pressure of the remaining hot air pushes the vent fabric back into place. A parachute vent can be opened briefly while in flight to initiate a rapid descent. (Slower descents are initiated by allowing the air in the balloon to cool naturally.) The vent is pulled open completely to collapse the balloon after landing.
An older, and presently less commonly used, style of top vent is called a "Velcro-style" vent. This too is a disk of fabric at the top of the balloon. However, rather than having a set of "vent lines" that can repeatedly open and close the vent, the vent is secured by "hook and loop" fasteners (such as Velcro) and is only opened at the end of the flight. Balloons equipped with a Velcro-style vent typically have a second "maneuvering vent" built into the side (as opposed to the top) of the balloon. Another common type of top design is the "smart vent", which, rather than lowering a fabric disc into the envelope as in the "parachute" type, gathers the fabric together in the center of the opening. This system can theoretically be used for in-flight maneuvering, but is more commonly used only as a rapid-deflation device for use after landing, of particular value in high winds. Other designs, such as the "pop top" and "MultiVent" systems, have also attempted to address the need for rapid deflation on landing, but the parachute top remains popular as an all-around maneuvering and deflation system.
Besides special shapes, possibly for marketing purposes, there are several variations on the traditional "inverted tear drop" shape. The simplest, often used by home builders, is a hemisphere on top of a truncated cone. More sophisticated designs attempt to minimize the circumferential stress on the fabric, with different degrees of success depending on whether they take fabric weight and varying air density into account. This shape may be referred to as "natural".[34] Finally, some specialized balloons are designed to minimize aerodynamic drag (in the vertical direction) to improve flight performance in competitions.[35]
Hot air balloon baskets are commonly made of woven wicker or rattan. These materials have proven to be sufficiently light, strong, and durable for balloon flight. Such baskets are usually rectangular or triangular in shape. They vary in size from just big enough for two people to large enough to carry thirty.[36] Larger baskets often have internal partitions for structural bracing and to compartmentalize the passengers. Small holes may be woven into the side of the basket to act as foot holds for passengers climbing in or out.[37]
Baskets may also be made of aluminium, especially a collapsible aluminium frame with a fabric skin, to reduce weight or increase portability.[38] These may be used by pilots without a ground crew or who are attempting to set altitude, duration, or distance records. Other specialty baskets include the fully enclosed gondolas used for around-the-world attempts[39] and baskets that consist of little more than a seat for the pilot and perhaps one passenger.
The burner unit gasifies liquid propane,[40] mixes it with air, ignites the mixture, and directs the flame and exhaust into the mouth of the envelope. Burners vary in power output; each will generally produce 2 to 3 MW of heat (7 to 10 million BTUs per hour), with double, triple, or quadruple burner configurations installed where more power is needed.[41][42] The pilot actuates a burner by opening a propane valve, known as a blast valve. The valve may be spring-loaded, so that it closes automatically, or it may stay open until closed by the pilot. The burner has a pilot light to ignite the propane and air mixture. The pilot light may be lit by the pilot with an external device, such as a flint striker or a lighter, or with a built-in piezoelectric spark.[43]
Where more than one burner is present, the pilot can use one or more at a time, depending on the desired heat output. Each burner has a metal coil of propane tubing the flame shoots through to preheat the incoming liquid propane. The burner unit may be suspended from the mouth of the envelope or supported rigidly over the basket. The burner unit may be mounted on a gimbal to enable the pilot to aim the flame and avoid overheating the envelope fabric. A burner may have a secondary propane valve that releases propane more slowly and thereby generates a different sound. This is called a whisper burner and is used for flight over livestock to lessen the chance of spooking them. It also generates a more yellow flame and is used for night glows because it lights up the inside of the envelope better than the primary valve.
Propane fuel tanks are usually cylindrical pressure vessels made from aluminium, stainless steel, or titanium with a valve at one end to feed the burner and to refuel. They may have a fuel gauge and a pressure gauge. Common tank sizes are 38, 57 and 76 litres (10, 15 and 20 US gallons).[29] They may be intended for upright or horizontal use and may be mounted inside or outside the basket.
The pressure necessary to force the fuel through the line to the burner may be supplied by the vapor pressure of the propane itself, if warm enough, or by the introduction of an inert gas such as nitrogen.[43] Tanks may be preheated with electrical heat tapes to produce sufficient vapor pressure for cold-weather flying.[44] Warmed tanks are usually also wrapped in an insulating blanket to preserve heat during the setup and flight.
A balloon may be outfitted with a variety of instruments to aid the pilot. These commonly include an altimeter, a rate-of-climb (vertical-speed) indicator known as a variometer, envelope (air) temperature, and ambient (air) temperature.[45] A GPS receiver can be useful to indicate ground speed (traditional aircraft air-speed indicators would be useless) and direction.
The combined mass of an average system can be calculated as follows:[29]
| Component | Pounds | Kilograms | Mass fraction |
|---|---|---|---|
| 2,800 m3 (100,000 cu ft) envelope | 250 | 113.4 | |
| 5-passenger basket | 140 | 63.5 | |
| Double burner | 50 | 22.7 | |
| 3 76 L (20 US gal) fuel tanks full of propane | 3 × 135 = 405 | 183.7 | |
| 5 passengers | 5 × 150 = 750 | 340.2 | |
| Subtotal | 1595 | 723.5 | |
| 2,800 m3 (100,000 cu ft) of heated air* | 5922 | 2686.2 | |
| Total | (3.76 tons) 7517 | 3409.7 |
Increasing the air temperature inside the envelope makes it less dense than the surrounding (ambient) air. The balloon floats because of the buoyant force exerted on it. This force is the same force that acts on objects when they are in water and is described by Archimedes' principle. The amount of lift (or buoyancy) provided by a hot air balloon depends primarily upon the difference between the temperature of the air inside the envelope and the temperature of the air outside the envelope. For most envelopes made of nylon fabric, the maximal internal temperature is limited to approximately 120 °C (250 °F).[46]
The melting point of nylon is significantly greater than this maximal operating temperature—about 230 °C (450 °F)—but higher temperatures cause the strength of the nylon fabric to degrade more quickly over time. With a maximal operating temperature of 120 °C (250 °F), balloon envelopes can generally be flown for between 400 and 500 hours before the fabric needs to be replaced. Many balloon pilots operate their envelopes at temperatures significantly less than the maximum to extend envelope-fabric life.
The lift generated by 2,800 m3 (100,000 cu ft) of dry air heated to various temperatures may be calculated as follows:
| Air temperature °C (°F) |
Air density kg/m3 (lb/cu ft) |
Air mass kg (lb) |
Lift generated kg (lb) |
|---|---|---|---|
| 20 (68) | 1.2041 (0.07517) | 3,409.7 (7,517) | 0, (0) |
| 99 (210) | 0.9486 (0.05922) | 2,686.2 (5,922) | 723.5 (1,595) |
| 120 (248) | 0.8978 (0.05605) | 2,542.4 (5,605) | 867.3 (1,912) |
The density of air at 20 °C (68 °F) is about 1.2 kg/m3 (0.075 lb/cu ft). The total lift for a balloon of 2,800 m3 (100,000 cu ft) heated to 99 °C (210 °F) would be 723.5 kg (1,595 lb). This is just enough to generate neutral buoyancy for the total system mass (not including the heated air trapped in the envelope, of course) stated in the previous section. Liftoff would require a slightly greater temperature, depending on the desired rate of climb. In reality, the air contained in the envelope is not all at the same temperature, as the accompanying thermal image shows, and so these calculations are based on averages.
For typical atmospheric conditions (20 °C or 68 °F), a hot air balloon heated to 99 °C (210 °F) requires about 3.91 m3 of envelope volume to lift 1 kilogram (equivalently, 62.5 cu ft/lb). The precise amount of lift provided depends not only upon the internal temperature mentioned above, but the external temperature, altitude above sea level, and humidity of the air surrounding. On a warm day, a balloon cannot lift as much as on a cool day, because the temperature required for launch will exceed the maximum sustainable for nylon envelope fabric. Also, in the lower atmosphere, the lift provided by a hot air balloon decreases about 3% per 1,000 m (1% per 1,000 ft) of altitude gained.[47]
There are several different types of hot air balloons, all with different means of taking and sustaining flight.
Standard hot air balloons are known as Montgolfier balloons and rely solely on the buoyancy of hot air provided by the burner and contained by the envelope.[48] This style of balloon was developed by the Montgolfier brothers and had its first public demonstration on 4 June 1783 with an unmanned flight lasting 10 minutes, followed later that year with manned flights.[49]
Instead of using regular air it is also possible to use lighter than air gasses such as Helium or Hydrogen to lift the balloon,[51] though this means it is technically not a hot air balloon, though they did influence the design of hybrid balloons.
The 1785 Rozière balloon, is the main type of hybrid balloon, named after its creator, Jean-François Pilâtre de Rozier. It has a separate cell for a lighter-than-air gas (typically helium), as well as a cone below for hot air (as is used in a hot air balloon) to heat the helium at night. Hydrogen gas was used in the very early stages of development but was quickly abandoned due to the danger of introducing an open flame near the gas, for example when Rozier attempted to cross the English Channel with his prototype, the fire used to heat the air ignited the Hydrogen and killed both him and his copilot thirty minutes after takeoff.[52] As such, all modern hybrid balloons now use helium as a lifting gas.[53] These balloons are commonly used for high performance records for hot air balloons.
Solar balloons are hot air balloons that use just solar energy captured by an envelope. These envelopes are more specialized than for other hot air balloons, trying to maximize the amount of solar energy they collect. This can be accomplished by rotating the envelope during flight or by having the envelope colored black or another dark color.[54] They were pioneered in the 1970s in Europe by Tracy Barnes, Dominic Michaelis, and in the US by Frederick Espoo and Paul Woessher.[55]
A Thermal airship, or blimp, became a reality in the 1960s. Thermal airships were the first steerable air buoyant vehicles.[56] They utilized tail fins and a rudder and contained strictly hot air rather than a mix with hydrogen or helium.[56]
Observation balloons were deployed as early as the American Civil War and used as reconnaissance towers.[57] The first military funded balloon in America was designed by Thaddeus Lowe on August 2, 1861, for the Union.[57] His design utilized gas from municipal lines to inflate the balloon as he did not have access to a portable generator.[57] Observation balloons during this time were all made using multicolored-silk, wicker baskets, and were vertically oriented and tear shaped.[58] Hydrogen, or illumination gas became the most used inflation fuel by the 20th Century, as it was lighter than air.[58] Observation balloon usage skyrocketed in Britain by the Royal Engineers at the end of the 19th Century, deploying to Sudan in 1885 and to South Africa during the Second Boer War from 1899 to 1902.[59]
Due to the overall design of hot air balloons, controlled and precise steering of hot air balloons is not possible; it is possible for pilots to try to achieve basic directional control by changing altitude and catching different wind streams.[60] Wind in the northern hemisphere tends to turn east due to coriolis effect as the altitude increases.
The most effective way of landing a hot air balloon is to reduce the energy in the envelope, either by turning down the flame in Montgolfier and Hybrid balloons, or more directly by opening a flap in the envelope that will release the air/gas inside.[60]
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To help ensure the safety of pilot and passengers, a hot air balloon may carry several pieces of safety equipment.
To relight the burner if the pilot light goes out and the optional piezo ignition fails, the pilot should have ready access to a means of backup ignition, such as a flint spark lighter. Many systems, especially those that carry passengers, have completely duplicate fuel and burner systems: two fuel tanks, connected to two separate hoses, which feed two distinct burners. This enables a safe landing in the case of a blockage somewhere in one system or if a system must be disabled because of a fuel leak.
A fire extinguisher suitable for extinguishing propane fires is useful. Most balloons carry a 1 or 2 kg AB:E type fire extinguisher.[61]
A handling or drop line is mandatory safety equipment in many countries. This is a rope or webbing of 20–30 meters in length attached to the balloon basket with a quick-release connection at one end. In very calm winds the balloon pilot can throw the handling line from the balloon so that the ground crew can guide the balloon safely away from obstructions on the ground.[62]
For commercial passenger balloons, a pilot restraint harness is mandatory in some countries. This consists of a hip belt and a webbing line that together allow for some movement while preventing the pilot from being ejected from the basket during a hard landing.
Further safety equipment may include a first-aid kit, a fire blanket and a strong rescue knife.
At a minimum, the pilot should wear leather or flame-retardant fiber (such as nomex) gloves, so that they may shut off a gas valve in the case of a leak, even if there is a flame present; quick action in this regard can turn a potential catastrophe into a mere inconvenience. The pilot should additionally wear flame-resistant clothing covering their arms and legs; either natural fiber, such as cotton, linen, hemp, or wool, or engineered flame-retardant fiber, such as nomex, is acceptable in this capacity. Most engineered fibers (with the exception of rayon, which is also safe to wear) are thermoplastic; many are also hydrocarbons. This makes such fabrics very much unsuitable to wear near high temperatures, since non-flame-retardant thermoplastics will melt onto the wearer, and most hydrocarbons, whether fibrous or not, are suitable to use as fuels. Natural fiber will singe rather than melt or burn readily, and flame-retardant fiber generally has a very high melting point and is intrinsically non-flammable. Many pilots also advise their passengers to wear similar protective clothing that covers their arms and legs, as well as strong shoes or boots that offer good ankle support. Finally, some balloon systems, especially those that hang the burner from the envelope instead of supporting it rigidly from the basket, require the use of helmets by the pilot and passengers.
The ground crew should wear gloves whenever there is a possibility of handling ropes or lines. The mass and exposed surface to air movement of a medium-sized balloon is sufficient to cause rope friction burns to the hands of anyone trying to stop or prevent movement. The ground crew should also wear sturdy shoes and at least long pants in case of the need to access a landing or landed balloon in rough or overgrown terrain.
As with aircraft, hot air balloons require regular maintenance to remain airworthy. As aircraft made of fabric and that lack direct horizontal control, hot air balloons may occasionally require repairs to rips or snags. While some operations, such as cleaning and drying, may be performed by the owner or pilot, other operations, such as sewing, must be performed by a qualified repair technician and recorded in the balloon's maintenance log book.
To ensure long life and safe operation, the envelope should be kept clean and dry. This prevents mold and mildew from forming on the fabric and abrasion from occurring during packing, transport, and unpacking due to contact with foreign particles. In the event of a landing in a wet (because of precipitation or early morning or late evening dew) or muddy location (farmer's field), the envelope should be cleaned and laid out or hung to dry.
The burner and fuel system must also be kept clean to ensure safe operation on demand. Damaged fuel hoses need to be replaced. Stuck or leaky valves must be repaired or replaced. The wicker basket may require occasional refinishing or repair. The skids on its bottom may require occasional replacement.
Balloons in most parts of the world are maintained in accordance with a fixed manufacturer's maintenance schedule that includes regular (100 flight hours or 12 month) inspections, in addition to maintenance work to correct any damage. In Australia, balloons used for carrying commercial passengers must be inspected and maintained by approved workshops.[63]
In the case of a snag, burn, or rip in the envelope fabric, a patch may be applied or the affected panel completely replaced. Patches may be held in place with glue, tape, stitching, or a combination of these techniques. Replacing an entire panel requires the stitching around the old panel to be removed, and a new panel to be sewn in with the appropriate technique, thread, and stitch pattern.
Depending on the size of the balloon, location, and intended use, hot air balloons and their pilots need to comply with a variety of regulations.
As with other aircraft in the US, balloons must be registered (have an N-number), have an airworthiness certificate, and pass annual inspections. Balloons below a certain size (empty weight of less than 155 pounds or 70 kg including envelope, basket, burners and empty fuel tanks) can be used as an ultralight aircraft.
In Australia, private balloon pilots are managed by the Australian Ballooning Federation[64] and typically become members of regional hot air ballooning clubs. Commercial operations carrying fare paying passengers or charging for promotional flights must operate under an Air Operators Certificate from the Australian Civil Aviation and Safety Authority (CASA) with a nominated Chief Pilot. Pilots must have different degrees of experience before they are allowed to progress to larger balloons. Hot air balloons must be registered aircraft with CASA and are subject to regular airworthiness checks by authorised personnel.[65]
In the UK, the person in command must hold a valid Private Pilot's Licence issued by the Civil Aviation Authority specifically for ballooning; this is known as the PPL(B). There are two types of commercial balloon licences: CPL(B) Restricted and CPL(B) (Full). The CPL(B) Restricted is required if the pilot is undertaking work for a sponsor or being paid by an external agent to operate a balloon. The pilot can fly a sponsored balloon with everything paid for with a PPL unless asked to attend any event. Then a CPL(B) Restricted is required. The CPL(B) is required if the pilot is flying passengers for money. The balloon then needs a transport category C of A (certificate of air worthiness). If the pilot is only flying sponsor's guests and not charging money for flying other passengers, then the pilot is exempted from holding an AOC (air operator's certificate) though a copy of it is required.[clarification needed] For passenger flying the balloon also requires a maintenance log.
In the United States, a pilot of a hot air balloon must have a pilot certificate from the Federal Aviation Administration (FAA), carrying the rating of "Lighter-than-air free balloon", and unless the pilot is also qualified to fly gas balloons, will also carry this limitation: "Limited to hot-air balloons with airborne heater". A pilot does not need a license to fly an ultralight aircraft, but training is highly advised, and some hot-air balloons meet the criteria.
To carry paying passengers for hire (and attend some balloon festivals), a pilot must have a commercial pilot certificate. Commercial hot air balloon pilots may also act as hot air balloon flight instructors. While most balloon pilots fly for the pure joy of floating through the air, many are able to make a living as a professional balloon pilot. Some professional pilots fly commercial passenger sightseeing flights, while others fly corporate advertising balloons.[66]
The largest manufacturer of hot air balloons is Cameron Balloons of Bristol, England, which also owns Lindstrand Balloons of Oswestry, England. Cameron Balloons, Lindstrand Balloons and another English balloon manufacturing company Thunder and Colt (since acquired by Cameron) have been innovators and developers of special shaped balloons. These hot-air balloons use the same principle of lift as conventional inverted teardrop-shaped balloons, but often sections of the special balloon envelope shape do not contribute to the balloon's ability to stay aloft.
The second largest manufacturer of hot air balloons is Ultramagic company, based in Spain, which produces from 80 to 120 balloons per year. Ultramagic can produce very large balloons, such as the N-500 that accommodates as many as 27 persons in the basket, and has also produced many balloons with special shapes, as well as cold-air inflatables.
One of the three largest companies in the world is Kubicek Balloons. From its factory in Brno, Czechia the company ships its products worldwide. Produces from 100 to 115 balloons per year. Kubicek company also focus on special shape balloons, FAA/EASA type certified and are delivered with a Standard Airworthiness Certificate.
In the USA Aerostar International, Inc. of Sioux Falls, South Dakota was North America's largest balloon manufacturer and a close second in world manufacturing before ceasing to build balloons in January 2007. The oldest U.S. certified manufacturer is now Adams Balloons out of Albuquerque, New Mexico. Firefly Balloons, formerly The Balloon Works, is a manufacturer of hot air balloons in Statesville, North Carolina. Another manufacturer is Head Balloons, Inc. of Helen, Georgia.
The major manufacturers in Canada are Sundance Balloons and Fantasy Sky Promotions. Other manufacturers include Kavanagh Balloons of Australia, Schroeder Fire Balloons of Germany, Kubicek Balloons of the Czech Republic, and LLopis Balloons of France.
Propane tanks used in hot air balloons are mainly constructed of either aluminum or stainless steel. Most aluminum tanks are vertical 10-gallon cylinders (DOT 4E240), built primarily for forklift trucks.
Cylinders in liquid service are commonly found on forklifts.
2 Needle Double Lap Seaming Also called Felled Seam
all of the seams are the "French fell" type
The double lap seam features two rows of parallel stitching along the folded over fabric seam. A few manufactures use a flat seam.
perfect French Fell hot air balloon seam
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