![](http://www.alamy.com/thumbs/6/1370CB2D-35AF-4089-AE15-C498C7380321/2WH23C7.jpg)
Evolutions of a flexible triangular wing hang glider invented by the American Francis Rogallo in 1948
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Photo credit: © Colaimages / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: 1948, aeronautics, american, aviation, evolutions, flexible, francis, glider, hang, invented, rogallo, triangular, wing