Vought SBU Corsair
|Vought SBU-1 Corsairs in colorful prewar US Navy markings during the mid-thirties|
|National origin||United States of America|
|Primary user||United States Navy|
|Developed from||Vought XF3U|
|Developed into||Vought XSB3U|
The Vought SBU-1 Corsair was a two seat, all metal biplane dive bomber built by Vought Aircraft Company of Dallas, Texas for the US Navy. Its design was based upon the F3U-1 two seat fighter that was abandoned when the Navy decided not to build any more two seat fighters. The aircraft was equipped with a closed cockpit, had fixed landing gear, and was powered by a Pratt & Whitney R-1535 radial air-cooled engine as had the F3U-1, but also included a controllable pitch propeller and a new NACA cowl with adjustable cowling gills on the trailing edge of the cowl. The adjustable cowling gills permitted better control of cooling airflow over the engine.
The SBU-1 completed flight tests in 1934 and went into production under a contract awarded in January 1935. The Corsair was the first aircraft of its type, a scout bomber, to fly faster than 200 mph.
The name "Corsair" was used a total of three times by Vought's planes; the SBU-1 and the F4U (both Corsairs), and the A7 Corsair II.
Specifications (SBU-1) 
Data from United States Navy Aircraft since 1911 
- Crew: two: pilot, navigator/gunner
- Length: 27 ft 10 in (8.49 m)
- Wingspan: 36 ft 3 in (10.14 m)
- Height: 11 ft 11 in (3.63 m)
- Wing area: 327 ft² (30.4 m²)
- Empty weight: 3,645 lb (1,659 kg)
- Max. takeoff weight: 5,520 lb (2,509 kg)
- Powerplant: 1 × Pratt & Whitney R-1535-80 Twin Wasp Junior 14-cylinder two-row air-cooled radial engine, 700 hp (522 kW)
- Maximum speed: 178 knots (205 mph, 330 km/h) at 8,900 ft (2,700 m)
- Cruise speed: 106 knots (122 mph, 196 km/h)
- Range: 477 naut mi (548 mi, 882 km)
- Service ceiling: 23,700 ft (10,800 m)
- Rate of climb: 1,180 ft/min (6.0 m/s)
- Guns: 1x Fixed forward firing .30 in (7.62 mm) Browning machine gun and 1x machine gun flexibly mounted .30 in machine gun in rear cockpit
- Bombs: 1x 500 lb (227 kg) bomb
- Swanborough, Gordon and Bowers, Peter M. United States Navy Aircraft since 1911. London:Putnam, 1976. ISBN 0-370-10054-9.
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