Английская Википедия:Curtiss O-40 Raven
The Curtiss O-40 Raven was an American observation aircraft of the 1930s which was built and used in small numbers. A single example of the YO-40, a single-engined Sesquiplane with a retractable undercarriage was built, followed by four examples of a modified monoplane version, the O-40B, which remained in use until 1939.
Development and design
In 1931, in response to a United States Army Air Corps requirement for a new observation aircraft, Curtiss designed the Model 62, a single-engined biplane with the lower wing much smaller than the upper, known as a sesquiplane (i.e. "one-and-a-half wings"), while the outer panels of the upper wings were swept back to avoid centre-of-gravity problems. It was of all-metal construction, with a monocoque fuselage and had a retractable tailwheel undercarriage with inwards retracting mainwheels, and was powered by a Wright Cyclone radial engine. The crew of two sat in tandem in open cockpits.[1][2][3]
A prototype, designated YO-40, flew in February 1932. Although it crashed in May that year, it was rebuilt with stronger wings and an enclosed cockpit as the YO-40A. A further four YO-40As were ordered, but they were redesigned as monoplanes by removing the lower wing, the resultant aircraft being designated Y1O-40B.[2][4]
Operational history
The four Y1O-40Bs were delivered in June 1933, and after service tests, were redesignated O-40B,[5] being operated by the 1st Observation Squadron of the USAAC.[6] While the aircraft's performance and manoeuvrability were good, the Air Corps was disappointed with the cockpit arrangements and the low fuel capacity,[2] and no more orders followed. The last O-40B was withdrawn from use in 1939.[5]
Variants
- YO-40
- Prototype powered by 653 hp (487 kW) Wright R-1820E Cyclone engine.[7]
- YO-40A
- YO-40 rebuilt with stronger wings and enclosed cockpit. Scrapped 1938.[2][5]
- Y1O-40B
- Monoplane derivative with lower wing removed. Powered by 670 hp (500 kW) R-1820-27. Four built.[5]
- O-40B
- Redesignation of Y1O-40B.[5]
Operators
Specifications (O-40B)
References
- Notes
- Bibliography
- Bowers, Peter M. Curtiss Aircraft 1907-1947. London:Putnam, 1979. Шаблон:ISBN.
- "A Modern American Observation Aircraft:The Curtiss "Raven" (Wright "Cyclone F") developed for the U.S. Army Air Corps". Flight, 4 January 1934, p. 20.
External links
Шаблон:Curtiss aircraft Шаблон:USAAF observation aircraft
- ↑ Bowers 1979, pp. 331–332.
- ↑ 2,0 2,1 2,2 2,3 "Curtiss:K through Z". aerofiles. 24 January 2009. Retrieved 10 March 2010.
- ↑ Flight 4 January 1934, p.20.
- ↑ Bowers 1979, pp. 332–333.
- ↑ 5,0 5,1 5,2 5,3 5,4 Ошибка цитирования Неверный тег
<ref>; для сносокBowers Curtiss p333не указан текст - ↑ "Factsheets : 1 Reconnaissance Squadron (ACC) Шаблон:Webarchive". Air Force Historical Research Agency, United States Air Force. Retrieved 10 March 2010.
- ↑ Bowers 1979, p.332.
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