Cook Musfly

The Musfly was a British two-seat human-powered tailless aircraft built by David Cook in the 1970s.

Background
Intended to win the Kremer prize, the Musfly was designed by David Cook and Neil Moran, who at the time were employees at Richard Garrett & Sons, at Leiston, in Suffolk. The aircraft was a wire-braced high-wing tailless monoplane. The wing planform was made up of a central constant-chord swept wing, with anhedral wing-tips. "Draggons" (upward deflecting ailerons) fitted to the wing-tips would provide lateral and directional control. Pitch control would be by weight shift, with the crewed capsule, suspended beneath the wing, being moved back and forth.

In the capsule, the two-person crew would operate treadles in order to power a pusher propeller, which was to be positioned slightly below and behind the wing. The pilot would operate leg treadles, while the second crew member would use both arm and leg treadles. It was believed this arrangement would generate more power, with longer power strokes, than would be possible with a conventional pedal arrangement. Moran believed that the Musfly would fly with the crew generating 0.8 hp (0.6 kW).

The aircraft was built by Cook, with assistance from co-designer Moran, Chris Tansley, Terry Aspinall, Bob Jelliff, Brian Pattenden, and others, with the primary airframe being completed by September 1977. Work on the aircraft continued till at least 1979, and was nearing completion when Cook lost use of the building that it was being housed in. That development prompted the end of the project, and the airframe was then scrapped.