Earliest hang gliders


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Earliest hang gliders

While this history concentrates on the rediscovery of the hang glider in the second half of the 20th century, its foundations were laid by pioneers in Britain, Germany, the U.S.A., and other locations in the preceding century. Moreover, Chinese kite technology was ahead of western aerodynamic knowledge centuries before that.

…any crediting of individuals for innovations will win you more arguments than a politically inspired beauty contest with religious overtones.

— Don Dedera (3)

Thanks to hang glider historian and pioneering designer and pilot Tony Prentice for much of the content of this page.

The word invention is too liberally used especially in the field of aviation. Nature got there long before man even existed and many man made “inventions” can be seen in the fossil records of flying pterosaurs and current day birds, bats and insects. The principle of the sailwing was developed to propel boats thousands of years ago, probably more by trial and error than by invention. Kites were also developed in China hundreds of years ago using the same principle.

Leonardo da Vinci

With Chris [Dawes] on the lengthened nose tether as my only safety back up, I ran hard. The glider responded, climbing 50 ft. I maintained my airspeed, remembering the nose-diving tendency of the model. A couple of seconds later, the glider drifted sideways, heading for the ground. A blur shot across my field of vision as Chris sprinted in the opposite direction. As I flared he yanked the nose round into wind, turning the impact into a gentle ‘arrival’.

— Judy Leden (4)

Judy Leden launches in a Leonardo wing
Judy Leden in tethered flight in a Leonardo wing at ‘High and Over’ hill, Sussex, England, in 2002

In 2002, British instructor and world record holder Judy Leden flew a Leonardo hang glider built by Steve Roberts and Martin Kimm of Sky Sport Engineering. (Not to be confused with early American hang glider manufacturer Sky Sports.) Built entirely from materials available 500 years ago (even the control bar landing wheels were made of wood) its only major flaw was that it was un-steerable. Concessions to Judy’s safety — in addition to the ‘tram line’ training system at Sussex Hang Gliding and Paragliding (see also Training aids) — was a modern crash helmet, karabiner, and hang strap. (4)

A scale model was found to be unstable in pitch, so the full size glider’s stability was checked on the BHPA test rig before flight testing proper began. (See also Testing for stability and structural strength.) Da Vinci’s genius was borne out in that the full size glider was found to be pitch stable in normal flight regimes.

If only Da Vinci had developed this idea further, maybe we would have colonized Mars by now.

For another of Judy’s adventures, see Hang gliding 1994 and 1995.

Sir George Cayley

George Cayley glider drawings (public domain)
George Cayley glider drawings (public domain)

Sir George Cayley in the first half of the 19th century created a manned glider that flew and he laid down the fundamentals of flight.

George Cayley portrait
George Cayley

Lilienthal, Pilcher, and Chanute

Portrait of Otto Lilienthal
Portrait of Otto Lilienthal — Image by © Bettmann/CORBIS

Karl Wilhelm Otto Lilienthal designed, built, and flew a series of gliders in Germany during the last years of the 19th century.

Otto Lilienthal flying in about 1895
Otto Lilienthal flying in about 1895

Percy Pilcher (Britain) flew at about the same time as Lilienthal and designer Octave Chanute (U.S.A.) worked with volunteer test pilots in carrying on Otto’s work.

Chanute glider, 1896
Chanute glider, 1896 (no larger image available)

Chanute’s 1897 patent of a hang glider based on Lilienthal’s glider design shows a swing seat arrangement, which is possibly the first record of something like the upright or seat harness commonly used with standard Rogallo type hang gliders of the 1970s. (Leonardo da Vinci’s glider design drawings of 500 years previously do not appear to specify how the pilot is attached.) A swing seat type harness provides greater weight shift control than the then common method of gripping parallel bars under the armpits and swinging your legs for weight shift control. See Harnesses. (5)

Patrol Leader Smith or Beard of East Grinstead Scouts flying a Chanute type in 1912
Patrol Leader Smith or Beard of East Grinstead Scouts flying a Chanute type in 1912 (no larger image available)

In England in 1912, boy scouts built a Chanute type glider and flew it at a local fête. (1)


Tony Prentice's 1968 Lilienthal type hang glider
Tony Prentice’s 1968 Lilienthal type hang glider
Tony Prentice and his Lillienthal type hang glider, which he flew in 1968
Tony Prentice and his Lillienthal type hang glider, which he flew in 1968

See under External links later on this page for Tony’s YouTube channel, which includes digitized film of his Lillienthal type hang glider. Also see under External links for more recent flying replicas of Lilienthal’s gliders.


Lillienthal kite drawings
Lillienthal kite drawings

Lilienthal’s book Bird Flight as the basis of Aviation shows the typical cruciform kite with a crossbar that holds open the wing. The crossbar interferes with the sail, preventing the aerofoil from forming properly. Lilienthal was aware of this and illustrated a kite without the crossbar, which then permitted the aerofoil to form properly and improve its efficiency. It formed the same double conical shape that NASA engineer Francis Rogallo suggested shortly after World War 2, half a century later.

Wright brothers

Wright Brothers 1902 glider
Wilbur Wright in the brothers’ glider over the Kill Devil Hills, October 10th, 1902

When Orville and Wilbur Wright added engines and propellers to their 1902 glider the following year (the 1903 Wright Flyer being more practical than Hiram Maxim’s giant steam-powered airplane a few years before) they effectively killed hang gliding for the next half century and more. Two world wars and, immediately following the first of those, a virus pandemic that killed more people than were killed in both wars combined, together with the subsequent great economic depression doubtless contributed to humankind’s ingenuity being diverted away from hang gliding.

Ironically, the world’s longest established hang gliding school operates from this site. See the Kitty Hawk Kites page of this history.

Lavezzari and Jensen

Jan Lavezzari's 1904 hang glider
Jan Lavezzari’s 1904 hang glider

A few individuals kept alive the dream of running into the air and flying. One was Frenchman Jan Lavezzari, who flew a double lateen sail hang glider from the sand dunes at Berck-sur-Mer in 1904. Another was Volmer Jensen of Glendale, California, who designed, built, and flew hang gliders before World War 2.

Volmer Jensen, of Volmer Aircraft, built and flew his first hang glider in 1925, long before most of today’s birdmen were hatched.

— Paul Wahl writing in Popular Science, June 1972

Volmer Jensen's pre-war VJ-11, plans for which were advertised in 'Ground Skimmer' magazine in 1973
Volmer Jensen’s VJ-11, plans for which were advertised in Ground Skimmer magazine in 1973

Horten

On December 17, 1954, I made a thermal flight of more than one hour with the ‘Alita.’ I released at 500 meters AGL [1640 feet] and climbed up to 1200 meters AGL [3937 feet].

— Rogelio Bertolini writing in Vuelo Silencioso, the Argentina soaring magazine, March 1954

Horten III-f on display at the Smithsonian National Air and Space Museum Udvar-Hazy Center, Chantilly, Virginia
Horten III-f on display at the Smithsonian National Air and Space Museum Udvar-Hazy Center, Chantilly, Virginia

In Germany during World War 2, the Horten brothers developed this ‘flying wing’ tail-less glider: See Horten H III F under External links later on this page for this restoration. After designing a tail-less jet bomber with enough range to reach the USA, Reimar Horten fled to Argentina and developed a further series of tailless gliders, at least the first of which, the Alita, was in principle a hang glider.

Horten wing about to be transported in Argentina for its first flight  on February 7th, 1953
Horten HXa ‘Alita’ about to be transported for its first flight in Argentina on February 7th, 1953

The pilot of the Alita lay prone in the cockpit. Control was by elevons, with the pilot using a control stick. Later flight tests were launched by aero-tow.

These photos are from the Aviation Archives in Stuttgart, Germany, by whose permission they were used in Whole Air, June 1984.

Rogelio Bertolini with Horten glider at Cordoba, Argentina, on January 9th, 1954
Rogelio Bertolini with Horten ‘Alita’ glider at Cordoba, Argentina, on January 9th, 1954
Horten Alita tail-less rigid hang glider
Horten Alita, construction finished on June 30th, 1952

For notable derivatives of Horten’s work, see Mitchell Wing, about the B-10 Buzzard world record setting rigid hang glider of the late 1970s and other descendants of the Amerikabomber.

Horten Alita on its trailer
Horten Alita on its trailer
Horten Alita in flight
Horten Alita in flight

See also Horten brothers under External links later on this page.

Flex-wings

Lee and Darrah's 1910 design patent
Lee and Darrah’s 1910 design patent
G.D. Wanner's 1948 design patent
G.D. Wanner’s 1948 design patent

NASA engineer Francis Rogallo was interested in developing the simplest possible aircraft and a fully flexible wing that could be put in the boot (trunk) of car was his aim. His 1948 patent showed just that with a membrane wing with cords and no solid structure. The idea was then put to NASA that such a wing could be used by space vehicles during re-entry instead of parachutes. The wing could then be steered to a landing area rather than wherever it might land out — usually at sea. The time scale to develop it exceeded that of the need for the space launches so it was dropped. All the development that had gone into these flexible wings was then published, including the rigid framed versions, photos of which went around the world and were seen by many would-be fliers.

F.M. Rogallo and his daughter Carol in about 1950

That might be why it is called a Rogallo wing rather than a Lavezzari, Lee & Darrah, Dickenson, Palmer, Wanner, or Bach wing (for example).


Photo by Michel Moussier of the Ryan 'flying jeep' on the cover of a French magazine for insomniacs in May 1961
Photo by Michel Moussier of the Ryan ‘flying jeep’ on the cover of a magazine in May 1961

John Dickenson in Australia saw the NASA photos and he identified the Ryan powered aircraft in his letter to Rogallo as the one he saw before building his own towed ski kite. It has the rigid frame and weight shift control used in the Ryan research aircraft wing and used the trapeze bar from existing “flat” tow ski kites of the day. The result was a bi-conical sail with rigid leading edges, a triangular control frame, and the pilot in a swing-seat harness. (See Rogallo wing definitions and diagrams.)


…the “modern hang glider” would be defined as the one that put hang gliding out of the hobbyist category and turned it into not only a sport but an industry with manufacturers, dealers, schools, and a worldwide network of associations and clubs. And that would be the one that Dickenson put together, with its combination of the Rogallo/NASA bi-conical airfoil with a hang point that allowed the greatest possible weight shift control. It was easy to build, possible to fly, and not very expensive. That gave its devotees the ability to achieve a critical mass of supporters that would eventually spawn an industry.

— John LaTorre, e-mail correspondence with author in March 2021. See also the John LaTorre related topics menu.

Amy Dickenson with John's 1965 wing
Amy Dickenson with John’s 1965 wing (no larger image available)

From a 1963 towed ski kite partly made of wood, in 1965 John Dickenson created a glider indistinguishable from standard Rogallos manufactured ten years later.

John Dickenson tows up in a flex-wing hang glider of his own design 1965
John Dickenson tows up in 1965. Photo by Rod Fuller.

The leading edges, keel and cross boom were aluminium tube and their juncture was moved to the centre of pressure. The wing was made of modern sailcloth, a swing seat for the pilot hung from the top of the A-frame and the whole structure was rigged with stainless steel wire.

— Mark Woodhams and Jason Board, Flying the world’s first hang glider, in SkyWings, May 2009

See also Harnesses.


Art based on a photo of Barry Palmer flying a polythene standard Rogallo in the summer of 1962
Art based on a photo of Barry Palmer flying a polythene standard Rogallo in the summer of 1962

Meanwhile, in a retrograde step, the early hang glider experimenters in California such as Barry Palmer used the parallel bars type hang cage, which afforded much inferior control. Nonetheless, Palmer’s next glider was fitted with a ‘ski lift type of seat’ attached to the keel with a home-made universal joint. ‘A single stick projected down from the wing and carried the structural support.’ (2) That T bar structure was the equivalent of a triangular control frame for weight shift control.


This photo shows the ‘standard Rogallo’ flex-wing hang glider with a triangular control frame and the pilot in a harness that allows full weight-shift control. Modern flex-wings are refinements of this concept.

Tony Prentice, who supplied much of the historical detail on this page, flying the South Downs in 1973

The wing in the photo was the first that Tony Prentice made with metal tubes. His previous hang gliders were all made from bamboo, the first being around 1960. Although he is reluctant to make any such claim, that makes Tony possibly the first to design and build a working human-carrying Rogallo wing. See under External links later on this page for Tony’s YouTube channel, which includes digitized film this wing in flight.

Author’s note: The term Rogallo wing is used on these pages in its retrospective sense, meaning a bi-conical wing (or bi-cylindrical or semi-cylindrical) that keeps its aerodynamic shape as a result of the airflow around it. Therefore, using that definition, the 1910 patent — two years before F.M. Rogallo was born — is a Rogallo. Tony Prentice built his first such craft in 1960 with no knowledge of Rogallo’s work.

For Tony’s powered ultralight flying in the 1980s, see Early powered ultralights part 2.

Related

This topic continues in Hang gliding before 1973 part 1.

Chanute’s test pilots flew dunes on the eastern shore of lake Michigan, where hang gliders still fly. A major competition was held there in the early days of the resurgence of hang gliding. See Elberta Dune, Michigan, July 1974.

Rogallo wing definitions and diagrams

Space flight and hang gliding

External links

A History of Hang Gliding: How the sport started and spread across the world by Mark Woodhams (Amazon search)

Big Blue Sky – The history of modern hang gliding – the first extreme sport! — 2008 video by Bill Liscomb on YouTube starting at 3 minutes 3 seconds

British Hang Gliding History by Terry Aspinall

Correcting History, Who Invented The Modern Hang Glider—free e-book by Graeme Henderson and Terry Aspinall

Hang gliding Wikipedia entry

Hanggliding/Zeilvliegen part 1: Video on YouTube about Reinhold Platz. Narration by prominent European hang glider pilot Bart Doets is Dutch.

Hanggliding/Zeilvliegen part 2

History of hang gliding Wikipedia entry

Horten brothers Wikipedia entry

Horten brothers: Alita photos and text (Spanish) on AVEX Asociacion Argentina de Aviacion Experimental Facebook page

Horten H III F tail-less glider in World War 2, in the Smithsonian National Air and Space Museum

Lilienthal and Wright gliders flying together for the first time in history! on Kitty Hawk Kites YouTube channel

Lilienthal-Gleiter: Fliegen wie vor 125 Jahren | Gut zu wissen | BR video on YouTube

Otto Lillienthal biplane replica 2019 (video)

Otto Lilienthal’s First Film video on YouTube

The Dream of Flight by Tony Prentice on The Great Race web site

The Jacaranda Festival 1963 and the Fight of the first Modern Hang Glider by Graeme Henderson and Terry Aspinall

Tony Prentice YouTube channel including digitized film of his 1960s and 1970s hang gliders

References

1. The Early History of Air Scouting

2. The American Experience chapter by Dan Poynter in Hang Gliding by Martin Hunt and David Hunn, 1977

3. Don Dedera, Hang Gliding, the Flyingest Flying, by Don Dedera and Stephen McCarroll, 1975

4. Test flight — 500 years on by Judy Leden, SkyWings, April 2003

5. Chanute swing seat harness: Tony Prentice e-mail communication with the author in November 2021

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