Hang gliding 1977
This page follows Hang gliding 1976 part 2.
The images on this page are artistic derivations of contemporary photos. See Copyright of early hang gliding photos.
On June 24th, 1977, Bob Wills of Wills Wing was killed when his hang glider was struck by the down-wash of a helicopter filming him for a Jeep advert. Rob Kells, Steve Pearson, and Mike and Linda Meier took on the development of Bob’s latest design, and Wills Wing continued as one of about sixteen major hang glider manufactures in the USA. (*)
Wills Wing re-used the name Cross Country for their popular 1995 wing.
See the related topics menu Sport Kites/Wills Wing of California.
If you let a hang glider catch the wind at the wrong angle and you do not correct it quickly enough, nothing can stop it turning over and taking you with it. (Been there, done that, got the t-shirt…)
See the related topics menu Seagull Aircraft of Santa Monica, California.
The damage in this incident was limited to the power line and the glider.
Jim and Henry Braddock were second and first, respectively, at the U.S. national championships held at Heavener, Oklahoma, in July 1977. (Heavener rhymes with heathen, not heaven, apparently.)
Powered hang gliding was going through its early stages at this time. (See Early powered ultralights.) It brought problems additional to those inherent in hang gliding. The man standing and speaking in the following picture is hang gliding photographer and columnist Bill Allen.
The original photo by Jim Theis, on which this artistic rendering is based, is of Dan O’Neil dune-soaring an Electra Flyer Cirrus 3 in a gale on the dunes at at Boca Raton, Florida, during tropical depression Anita in August 1977.
Grouse Mountain, where Leroy Grannis took the photo on which this image is based, overlooks the city of Vancouver, Canada. For more of Grouse Mountain, see Grouse Mountain invitational 1984.
Hang gliding was still regarded as a spectator sport in the late 1970s. Here is a snippet about pilots John Davis and Glenn Hockett and competition promoter Don Whitmore:
Davis and Hockett and Whitmore were interviewed for national TV, and the remaining pilots packed their gear in the warm late afternoon sunlight. The city of Vancouver was shining, the ships in the bay swinging into the seabreeze.
— W.A. ‘Pork’ Roecker writing in Hang Gliding, September 1979
Former actress Bettina Gray traveled the world to photograph hang gliders and her shot of the Skyhook Sunspot on which this artistic derivation is based shows the shape of the sail in flight. See Skyhook Sailwings.
The wing that Ash is flying in this picture is a Birdman Moonraker. See also Birdman and Solar Wings of Wiltshire, England.
The Hiway Scorpion sported a ventral fin. See the related topics menu Hiway of Sussex, England, and Abergavenny, Wales. Eventually this site was lost to pressure by local residents.
Aspect ratio, or span divided by average chord, measures the spindliness of the glider. More span provides greater efficiency, in principle. In practice, however, increasing span incurs problems in controlling the washout (span-wise twist) of the sail and it also imposes higher structural loads and it can incur handling problems.
In 1977, Electra Flyer added the state-of-the-art Olympus to their successful Cirrus series of wings. See the related topics menu Electra Flyer of Albuquerque, New Mexico.
The Gryphon 2, while retaining the bowsprit configuration with thick cables holding the wings spread (instead of cross-tubes) did away with the large under-surface of the first Gryphons, thus moving the maximum camber farther forward.
In addition, the tip rudders of the mark 1 were replaced with a wing warping mechanism. The latter connected the hang strap, via a pivoting tube attached to the rear of the keel, then connected via cables, to the leading edges.
See the related topics menu Miles Wings Gulp and Gryphon.
At first we had hoped to conduct strength tests using a car-top aerodynamic loading system, but we were warned by the experience of UP and Albatross in America that any test done in this manner tends to result in a large pile of scrap after the smallest fault develops in the glider. We therefore opted to test the strength of the glider by a static loading method (as is used for conventional aircraft).
— Steve Hunt of Hiway Hang Gliders writing in the BHGA magazine Wings, September 1977
Rigid wings such as the Easy Riser biplane were static-load tested too.
As the airframe and sail distort, in a flex-wing at least, the washout distribution changes, which guides you in where to place the next sandbag. According to Hiway Hang Gliders, the crosstubes of the glider were first to fail, by Euler buckling.
Notice in the Albatross test that the control frame down-tubes, which are normally straight, are bending under compression. Straight edges in the background are straight, so the curvature is not merely a photographic effect.
While sandbag testing of single surface gliders suspended upside-down is effective, there is a particular problem with sandbag testing of double surface sails: You cannot reach the underside of the upper surface to put sandbags on it. Even if you could — and even if there was enough room — how many sandbags should you place on the lower surface to add an ‘upward’ (downward in the upside-down test) force on the cross-tubes?
That was one impetus behind hang gliding associations in several countries creating structural test rigs subsequently.
This topic continues in Hang gliding 1978 and 1979 part 1.
Ashley Doubtfire, legendary hang gliding instructor, on British Hang Gliding History
George Worthington Launching in the Owens Valley, 1977ish: Digitized film only 25 seconds long on YouTube. George was a retired U.S. Navy pilot and hang gliding world record setter in both rigid- and flex-wings.
HALF DOME! (1977) on skydiver and photographer Randy Forbes’ vimeo channel. Rich Piccirilli, Jim Hanbury, and Brian Johnson, together with film maker Carl Boenish and Wills Wing insider Chris Price, carry out a raid at Yosemite National Park, the details of which are narrated by text embedded in the video at the end…
It took two days traveling at night to get to the summit. Carl had so much camera gear that he had to hire two mules to bring him to the base of the ladder, which was 400 feet, straight up to the top. We hiked in the moonlight by waterfalls and raccoons. The next day while sleeping, our camp was attacked by an albino bear with pink eyes! He slashed a hole in our hanging food bag…
Mike Meier, Wills Wing–The Early Years in Sky Adventures, Legends and stories About the Early Days of Hang Gliding and Paragliding edited by Jim (Sky Dog) Palmieri and Maggie Palmieri, 1998