An ordinary hang glider is used for its wing and control frame, and the pilot can foot-launch from a hill or from flat ground, needing a length of about a football field to get airborne, or much less if there is an oncoming breeze and no obstacles.
[1] For a second time in aviation history, during the 1970s, motorization of simple gliders, especially those portable and foot-launched, became the goal of many inventors and gradually, small wing-mounted power packs were adapted.
Surprisingly, what really launched the powered ultralight aviation movement in the United States was not the Rogallo flexible wing but a whole series of rigid-wing motorized hang gliders.
[8] It is now estimated that a modern flexible Rogallo wing hang glider requires at least 6 hp (4 kW) at the prop shaft and about 45 lbf (200 N) of thrust just to maintain level flight.
[9] On March 15, 1975, John Moody successfully added a 12.5 hp (9 kW) West Bend engine with a 71 cm (28 in) propeller to an UFM Easy Riser biplane hang glider designed by Larry Mauro.
[29] La Fédération Aéronautique Internationale (FAI) is the international standard-setting and record-keeping body for aeronautics and astronautics, so it also oversees the official records by foot-launched powered hang gliders, currently under the RWF1 category.
Foot-launched powered hang glider (FLPHG) harnesses are built around a light metal frame with the engine and propeller mounted on the rear in a pusher configuration.