Delta Kite Construction
From DT Online
These kites are suitable for moderate breezes
- Hang gliders are based on the flexible kite wing designed in 1948 by Francis Rogallo, a NASA aeronautical engineer and in 1958 further developed by him into the 'parawing', a structure-less kite used to enable spacecraft to land.
 link=http://www.ulm31.fr/ulm-toulouse/historique/ulm-31-81.html
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