[JoeF]

TandemWingHG450.jpg (16.44 KiB) Viewed 142 times

JoinedWingHGbyEricBHall.jpg (94 KiB) Viewed 145 times

Eric B. Hall filed a patent for a hang glider. That hang glider could be studied, explored, discussed.
http://www.energykitesystems.net/Lift/2 ... index.html

US4336913EricBHallCompounWingAircraft.pdf

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