avia.wikisort.org - AeroplaneThe 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.
O-40 Raven |
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The original prototype YO-40 |
Role |
Observation aircraft Type of aircraft |
National origin |
United States of America |
Manufacturer |
Curtiss-Wright |
First flight |
1932 |
Introduction |
1933 |
Retired |
1939 |
Primary user |
United States Army Air Corps |
Number built |
5 |
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 The last O-40B was withdrawn from use in 1939.[5]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
- United States
- United States Army Air Corps
Specifications (O-40B)
Data from Curtiss Aircraft 1907–1947[5]
General characteristics
- Crew: two
- Length: 28 ft 10 in (8.79 m)
- Wingspan: 41 ft 8 in (12.70 m)
- Height: 10 ft 8 in (3.25 m)
- Wing area: 266 sq ft (24.7 m2)
- Empty weight: 3,754 lb (1,703 kg)
- Gross weight: 5,180 lb (2,350 kg)
- Powerplant: 1 × Wright R-1820-27 Cyclone 9-cylinder air-cooled radial engine, 670 hp (500 kW)
Performance
- Maximum speed: 187.7 mph (302.1 km/h, 163.1 kn)
- Cruise speed: 160.5 mph (258.3 km/h, 139.5 kn)
- Stall speed: 62 mph (100 km/h, 54 kn)
- Range: 324 mi (521 km, 282 nmi)
- Service ceiling: 23,100 ft (7,000 m)
- Rate of climb: 1,660 ft/min (8.4 m/s)
Armament
- Guns: 1× fixed forward firing .30 in machine gun and 1× .30 in machine gun in observers cockpit
References
- Notes
- Bowers 1979, pp. 331–332.
- "Curtiss:K through Z". aerofiles. 24 January 2009. Retrieved 10 March 2010.
- Flight 4 January 1934, p.20.
- Bowers 1979, pp. 332–333.
- Bowers 1979, p.333.
- "Factsheets : 1 Reconnaissance Squadron (ACC) Archived 2011-09-13 at the Wayback Machine". Air Force Historical Research Agency, United States Air Force. Retrieved 10 March 2010.
- Bowers 1979, p.332.
- Bibliography
External links
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Manufacturer designations | Early types | |
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Model letters | |
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Model numbers | |
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"L" series | |
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"CA" series | |
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"CR" series | |
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"CW" series | |
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"P" series |
- P-200
- P-202
- P-212
- P-218
- P-219
- P-222
- P-223
- P-224
- P-225
- P-227
- P-228
- P-229
- P-232
- P-235
- P-238
- P-239
- P-240
- P-241
- P-243
- P-244
- P-245
- P-247
- P-248
- P-249
- P-250
- P-251
- P-252
- P-253
- P-254
- P-255
- P-256
- P-257
- P-259
- P-261
- P-264
- P-268
- P-269
- P-272
- P-273
- P-274
- P-275
- P-276
- P-277
- P-278
- P-279
- P-280
- P-282
- P-283
- P-291
- P-292
- P-293
- P-295
- P-296
- P-297
- P-298
- P-299
- P-302
- P-303
- P-304
- P-305
- P-306
- P-307
- P-509
- P-517
- P-518
- P-538
- P-539
- P-541
- P-545
- P-551
- P-558
- P-565
- P-586
- P-588
- P-592
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"X" series | |
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Operator and role | Civil | Experimental | |
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Racers and record | |
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Airliners | |
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Utility | |
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Army | Ground attack | |
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Bombers | |
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Transports | |
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Fighters | |
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Observation | |
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Racers | |
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Trainers | |
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Experimental | |
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Licensed | |
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Navy | Bombers | |
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Fighters | |
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Observation/scout | |
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Trainers | |
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Transports | |
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Maritime patrol | |
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Racers and record | |
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Export | Bombers | |
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Maritime patrol | |
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Fighters | |
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Trainers | |
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1 Designation skipped 2 Not built |
United States observation aircraft designations, USAAC/USAAF and Tri-Service systems |
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USAAC/USAAF sequence (1924–1942) | |
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Tri-service sequence (1962–present) | Related designations | |
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1 Unconfirmed |
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На других языках
- [en] Curtiss O-40 Raven
[it] Curtiss O-40 Raven
Il Curtiss O-40 Raven (corvo in inglese), fu un aereo da osservazione monomotore, biposto e monoplano ad ala alta sviluppato dall'azienda aeronautica statunitense Curtiss-Wright Corporation nei primi anni trenta.
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