![]() Consider those who were wanting "all the hang glider one could have from spending less than say $20 USD." Then a Batso or Bamboo Butterfly might fully satisfy these are variants of the Rogallo theme. However, "improving" a hang glider is one dimension of design activity a lateral direction of "morphing" a design category results in variants that provide specific kinds of performance, utility, specific-purpose fulfillment in this direction one may find hundreds of various hang glider designs within a type family. Other improvements in leading edge and materials design soon followed, improving the handling and efficiency of flexible-wing hang gliders. The Rogallo wing was subsequently improved in the mid-1970s with the invention of the Swallowtail design, several of which were used to impressive effect in the 1976 film Sky Riders. An alternative to hang gliding is Paragliding since the gear is more easily transported although it offers lower performance. Hang gliding then became popular world-wide, with the peak in the 1980s. Bill Moyes became the first to foot launch a Dickenson wing, a Rogallo with A-frame, in 1967. ![]() The hang glider was towed behind a ski-boat driven by Pat Crowe. This was first flown in public at the Grafton Jacaranda Festival in Sep of that year, flown by Rod Fuller. In Australia John Dickenson added an A-frame to the Rogallo wing in 1963. Throughout the 60s parallel development of hang gliders occurred in the USA and Australia. In 1960 Barry Palmer became the first to foot launch in a Rogallo wing. This device was considered as a possible landing system for the astronauts return to earth. Modern hang gliding was invented, or at least strongly influenced, by the NASA technician Francis Rogallo in 1948 with the invention of the Flexkite.
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