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Colver Skysail
Frank Colver, his son Matt, and his friend Ernest Feher built the bamboo and plastic glider (R Miller's Bamboo Bomber) that was at the 1st Otto meet. After the meet Colver started designing the one-off Skysail with inspiration from Richard Miller's Conduit Condor. After testing a scale model actual construction on the Skysail started on November 5, 1971 and the wing was taken to the field for the first time on January 22 of 1972.
Colver sold many copies of plans for a model of the Skysail but never for the full size version, due to liability worries. If someone scaled it up that was their choice.

The airfoil at the tips was inverted to reduce the amount of physical twist need for pitch stability. This was 1974 and by that time Colver had changed from a triangle control bar to a parallel bar system for ease of ground handling.
The end bays of the single surface wing have ribs upside down and were crossed underneath, not on top. Wingtip rudders were controlled through the seat.
After Colver quit flying the Skysail it was donated to the San Diego Aerospace Museum where it burned up in the fire that destroyed the museum.  
Wingspan: 31 ft 9 in
Glider weight: 70 lb

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