In 1938, the Navy solicited bids for two types of high performance fighters. The first, a single engine fighter, became the Vought F4U Corsair. The second, a twin engine fighter, became the XF5F-1 Skyrocket. The XF5F-1 would be developed through three distinct versions with both long-nose and short-nose configurations. The twin-engine, twin-tail prototype was overbuilt so as to house ever increasing power plants which were never utilized. A version, the XP-50, was developed for the Army and lessons leaned would be utilized in the superlative F7F Tigercat. Although never put into production, the XF5F-1 aircraft provided valuable aeronautical research until it was stricken on December 11, 1944 after a gear up landing. The Army's XP-50 differed in having tricycle landing gear, extended nose, and turbo-supercharged engines. Unlike the XF5F-1 its life would be short lived. It first flew on February 18, 1941 and crashed on May 14, 1941 due to an in-flight turbo explosion. In June 1941, two follow-on XP-65s were ordered (forerunner of the F7F). That contract was cancelled in January 1942, but the Navy's F7F would fly in November 1943.