Maiden flight 23 November 1942
Status Cancelled 15 March 1947
Number built 1
Variants Vought XF5U
The V-173 (Flying Pancake) designed by Charles H. Zimmerman was an American experimental test aircraft built as part of the Vought XF5U-1 Flying Flapjack World War II U.S. Navy fighter aircraft program.
Both aircraft featured an unorthodox "all-wing" design consisting of a flat, somewhat disk-shaped body (hence its name) serving as the lifting surface. Two piston engines buried in the body drove propellers located on the leading edge at the wingtips.