https://www.youtube.com/watch?v=Ao-ymagLypI

This is a Quadruplane Hang Glider designed and built by Larry Hall
around 1978. This video was taken from a VHS cassette tape that was made from
the original Super 8 movie film. These flights were made at The Point of the
Mountain, Utah. The glider had a span (top wing) of 20 feet 10 inches. It
weighed approximately 65 pounds. There was an article about it in the January
1979 Soaring Magazine.