Grumman F3F

The F3F, which inherited the Leroy Grumman-designed retractable main landing gear configuration first used on the Grumman FF, served as the basis for a biplane design ultimately developed into the much more successful F4F Wildcat that succeeded the subpar Buffalo.

The Navy's experience with the F2F revealed issues with stability and unfavorable spin characteristics,[1] prompting the 15 October 1934 contract for the improved XF3F-1, placed before F2F deliveries began.

[4] The first production F3F-1 (BuNo 0211) was delivered on 29 January 1936 to the test group at Naval Air Station Anacostia, with squadron service beginning in March to VF-5B of Ranger and VF-6B of Saratoga.

[5] Grumman, wanting to take advantage of the powerful new 950 hp (708 kW) Wright R-1820 supercharged radial engine, began work on the F3F-2 without a contract; the order for 81 aircraft was not placed until 25 July 1936, two days before the type's first flight.

It featured a larger-diameter propeller, and a complete revision of the fuselage skinning forward of the aft cabane strut in order to improve aerodynamics and reduce carbon monoxide intrusion.

A civilian aerobatic two-seat variant, the G-22A "Gulfhawk II," was constructed in 1936 and flown by Major Alford "Al" Williams, head of Gulf Oil's aviation department.

The better known F4F Wildcat of World War II was a monoplane development of an improved F3F biplane design. This XF4F-3 prototype clearly shows the family lines.
Grumman F3F-2 at the National Naval Aviation Museum, Pensacola, Florida (2007)
Three-side drawing of an F3F-1