The Grumman F3F was the last biplane to enter American military service. It was designed for the US Navy in 1934 as an improved version of the previous F2F fighter, mainly to solve the problem of the plane struggling to recover from a flat spin. The F3F entered service in 1936, though its days were already numbered; wind tunnel tests and advancements in aircraft development had projected that monoplanes were the future. After just four years in service, the F3F was withdrawn in 1941 prior to the Pacific War, being replaced by the Brewster F2A Buffalo monoplane fighter, although some remained in service until 1943 as trainer aircraft. In total, 147 F3Fs of all variants were built. (Source: War Thunder Wiki)
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