|National origin||United States|
|First flight||May 9, 1933|
|Developed into||SBU Corsair|
Development and design
The XF3U was designed to meet the Bureau of Aeronautics 1932 Design Specification No. 111, which called for a high-performance fighter with a fixed undercarriage and powered by a Pratt & Whitney R-1535 Twin Wasp Junior air-cooled radial engine. Of the seven proposed aircraft the XF3U and the Douglas XFD were chosen. The XF3U was the first all-metal aircraft produced by Vought. The aircraft was also equipped with an enclosed cockpit. During flight testing in 1933, it outperformed the Douglas entry and was chosen the winner.
The Navy no longer was interested in two-seat fighters, and therefore only the one XF3U prototype aircraft was built. The XF3U subsequently evolved into a dive bomber, and became the XSBU prototype for the SBU-1 Corsair.
Data from 
- Crew: 2; pilot, navigator
- Length: 27 ft 10 in (8.4 m)
- Wingspan: 33 ft 3 in (10.1 m)
- Height: 11 ft 11 in (3.6 m)
- Wing area: 295 ft² (27.4 m²)
- Empty weight: 3,435 lb (1,558 kg)
- Max. takeoff weight: 5,297 lb (2,402 kg)
- Powerplant: 1 × Pratt & Whitney R-1535-80 Twin Wasp Jr. 14-cylinder air-cooled radial engine, 700 hp (518 kW)
- Maximum speed: 208 mph (334 km/h)
- Range: 570 mi (917 km)
- Service ceiling: 25,300 ft (7,700 m)
- Wing loading: 18 lb/ft² (88 kg/m²)
- Power/mass: 0.13 hp/lb (0.22 kW/kg)
3 × .30 in (7.62 mm) machine guns
- Angelucci 1987, p. 434.
- Angelucci,Enzo. The American Fighter from 1917 to the present. New York: Orion Books, 1987. ISBN 0-517-56588-9.
Media related to Vought SBU at Wikimedia Commons