A one-off composite aircraft the "XF9-1" was built to resemble a Curtis F-11C Goshawk naval fighter using some Boeing Stearman components. Powered by a fuel injected Pratt & Whitney R-1340 600hp Wasp engine, builder John Pike is on record as saying, "The only purpose of this aircraft is to make a lot of noise and lots of smoke. The noise is perfect recreating the sound of early biplane fighters with short exhaust stacks. I just need to find an aircraft carrier I can get qualified on!".