ORIGINAL: HighPlains
A more interesting question might be why did it crash at the end of the first flight?
The end of the first flight ended with the plane snapping over and crashing inverted killing the pilot.
http://www.absoluteastronomy.com/topics/Bede_BD-5
Bede 5b all 4 short winged versions crashed ( due to high landing speeds )...a snapping was a tendency of that kite due to high centerline of thrust.