The Grumman XF5F Skyrocket was a prototype twin-engined shipboard fighter interceptor. The U. S. Navy ordered one prototype, model number G-34, from Grumman Aircraft Engineering Corporation on 30 June 1938; its designation was XF5F-1. The aircraft had a unique appearance: The forward "nose" of the fuselage did not extend forward of the wing. Provisions were included for two 23 mm (0.91 in) Madsen cannon as armament.