 Neither a kite, glider, or a type of aircraft, the Rogallo wing is most often seen in toy kites, but has been used to construct spacecraft parachutes during preliminary testing for NASA's "Gemini program" in the early 1960s, dirigible parachutes, ultralight powered aircraft like the trike, as well as hang gliders.Before the end of 1948, American aeronautical engineer Francis Rogallo had succeeded in inventing the first fully successful flexible-wing kite that he called the 'Flexi-Kite'.A patent was applied for in 1948 and granted in 1951.