|National origin||United States|
|First flight||8 May 1934|
The Vought O5U was a 1930s prototype American observation floatplane to meet a United States Navy requirement for a catapult launched scouting aircraft. The contract was won by Curtiss who went on to produce the SOC Seagull; only one O5U was built.
The United States Navy contracted three companies to produce prototypes to meet a requirement for a catapult launched biplane, with a central float and folding wings. Douglas produced the XO2D-1, Curtiss the XO3C-1 and Vought the XO5U-1.
The contract was awarded to Curtiss and only one XO5U-1 was built. The Status of Naval Aircraft, dated June 1937, listed the XO5U-1 as assigned at Mustin Field at the Naval Aircraft Factory, Philadelphia, Pennsylvania. It crashed in May 1938.
Data from 
- Crew: 2
- Length: 32 ft 6 in (9.91 m)
- Wingspan: 36 ft (11 m)
- Powerplant: 1 × Pratt & Whitney R-1340 9-cyl. air-cooled radial piston engine, 500 hp (370 kW)
- Maximum speed: 155 mph (249 km/h; 135 kn)
- Service ceiling: 15,100 ft (4,602 m)
- Curtiss O3C
- Douglas O2D
- List of seaplanes and amphibious aircraft
|Wikimedia Commons has media related to Vought O5U.|
- Michael O'Leary (November 2002). "Heroic Seagull". http://findarticles.com/p/articles/mi_qa3901/is_200211/ai_n9150793/.
- Andrade 1979, p. 205
- Larkins, William T., "U.S. Navy Aircraft 1921-1941 / U.S. Marine Corps Aircraft 1914-1959", Orion Books, a division of Crown Books, New York, 1988, Library of Congress card number 88-17753, ISBN 0-517-56920-5, page 202.
- Eckland, K.O.. "Vought". USA: Aerofiles.com. http://aerofiles.com/_vot.html. Retrieved 21 June 2012.
- Andrade, John (1979). U.S.Military Aircraft Designations and Serials since 1909. Midland Counties Publications. ISBN 0-904597-22-9.
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