The Grumman F3F is a single-seat biplane fighter aircraft produced by the Grumman aircraft for the United States Navy during the mid-1930s. Designed as an improved F2F, it entered service in 1936 as the last biplane fighter to be delivered to any American military air arm. It was retired from front line squadrons at the end of 1941 before World War II, and replaced by the Brewster F2A Buffalo. The F3F inherited the Leroy Grumman-designed retractable main landing gear first used on the Grumman FF, and was the basis for a biplane design ultimately developed into the F4F Wildcat.
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