The Vought V-173 “Flying Pancake” was an American experimental test aircraft designed by Charles H. Zimmerman and was built as part of the Vought XF5U “Flying Flapjack” World War II United States Navy fighter aircraft program.
Both the V-173 and the XF5U featured a rather unorthodox “all-wing” design consisting of flat, somewhat disk-shaped bodies (hence the name) serving as the lifting surface. Two piston engines buried in the body drove propellers located on the leading edge at the wing tips.
The original prototype, designated the V-173, was built of wood and canvas and featured a regular, fully symmetrical aerofoil section. Designed as a “proof-of-concept” prototype, the initial configuration V-173 was built as a lightweight test model powered by two 80 hp Continental A-80 engines turning F4U Corsair propellers.
These were later replaced by a pair of specially modified 16 ft 6 in three-bladed units. A tall, fixed main undercarriage combined…
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