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Stearman XBT-17

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Title: Stearman XBT-17  
Author: World Heritage Encyclopedia
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Subject: Stearman aircraft, Boeing XAT-15, Stearman Cloudboy, Stearman C2, Stearman C3
Collection: Single-Engine Aircraft, Stearman Aircraft, United States Military Trainer Aircraft 1940–1949
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Stearman XBT-17

Role Training monoplane
National origin United States
Manufacturer Stearman Aircraft
First flight 1940
Number built 1

The Stearman XBT-17 was a prototype 1940s American two-seat low-wing monoplane primary trainer designed and built by Stearman Aircraft (as the Model X-90).[1] It was evaluated by the United States Army Air Force in 1942 as the XBT-17.[2]

Design and development

The X-90 was a low-wing cantilever monoplane with two-seats in tandem under an enclosed canopy.[1] It had a fixed conventional landing gear and was powered by a 225 hp (168 kW) Lycoming R-680 engine and first flew in 1940.[1] It had wooden wings and a steel tube forward fuselage in order minimize use of aluminum.[3] In 1942 the aircraft was re-engined with a 450 hp (336 kW) Pratt & Whitney R-985 engine and redesignated the Model X-91.[1] The X-91 was evaluated by the United States Army Air Force as the XBT-17 but no more were built.[1][2]


Stearman X-90
Prototype basic trainer with a 225 hp (168 kW) Lycoming R-680 engine. [1]
Stearman X-91
The X-90 re-engined with a 450 hp (336 kW) Pratt & Whitney R-985 engine for USAAF evaluation.[1]
Stearman XBT-17
United States Army Air Force designation for the X-91.[2]

Specifications (XBT-17)

Data from [4]

General characteristics
  • Crew: two
  • Length: 27 ft 9 in (8.46 m)
  • Wingspan: 35 ft 9 in (10.90 m)
  • Wing area: 200 sq ft (19 m2)
  • Empty weight: 3,080 lb (1,397 kg)
  • Gross weight: 4,150 lb (1,882 kg)
  • Powerplant: 1 × Pratt & Whitney R-985-AN-1 , 450 hp (340 kW)


  • Maximum speed: 190 mph (306 km/h; 165 kn)
  • Cruise speed: 160 mph (139 kn; 257 km/h)
  • Service ceiling: 20,000 ft (6,096 m)
  • Rate of climb: 1,300 ft/min (6.6 m/s)

See also

Related lists


  1. ^ a b c d e f g "American airplanes: Stearman". 1 December 2008. Retrieved 2010-02-16. 
  2. ^ a b c Andrade 1979, p. 61
  3. ^ Bowers 1989, p.270.
  4. ^ Bowers 1989, p.271.
  • Andrade, John (1979). U.S.Military Aircraft Designations and Serials since 1909. Midland Counties Publications.  
  • Bowers, Peter M. (1989). Boeing Aircraft since 1916 (Third ed.). London: Putnam.  
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