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Stearman Cloudboy

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Model 6 Cloudboy
Stearman YBT-3.jpg
The YBT-3
General information
TypeTraining biplane
Manufacturer Stearman Aircraft Company
Primary user United States Army Air Corps
Number built7
History
Manufactured1930-1931
First flight 1931

The Stearman Model 6 Cloudboy was a 1930s American training biplane designed and built by the Stearman Aircraft Company of Wichita, Kansas.

Contents

History

The Cloudboy was designed as a commercial or military trainer. Due to economic pressure during the Great Depression, only a few aircraft were built. Three civil models were built, followed by four similar aircraft for evaluation by the United States Army Air Corps. Designated YPT-9 by the Army, it failed to gain any orders. All models went through a number of engine changes (resulting in new designations for both the military and civil aircraft). [1]

Variants

Model 6L Stearman Cloudboy (YBT-9B), N787H Stearman 6L Cloudboy Idling by Runway 31 at Sunset, Peach State Airport (GA2), April 1, 2015.jpg
Model 6L Stearman Cloudboy (YBT-9B), N787H
Model 6A Cloudboy
Initial civil production with a 165 hp (123 kW) Wright J-6 Whirlwind 5 engine, three built.
Model 6C Cloudboy
Re-engined with a 300 hp (220 kW) Wright J-6-9 Whirlwind (R-975-1), also designated YBT-3.
Model 6D Cloudboy
Re-engined with a 300 hp (220 kW) Pratt & Whitney Wasp Junior, also designated YBT-5
Model 6F Cloudboy
Re-engined with a 165 hp (123 kW) Continental A70 engine, also designated YBT-9A.
Model 6H Cloudboy
Re-engined with a 170 hp (130 kW) Kinner YR-720A engine, also designated YBT-9C.
Model 6L Cloudboy
Re-engined with a 200 hp (150 kW) Lycoming R-680-3 engine, also designated YBT-9B
YBT-5 Stearman YBT-5.jpg
YBT-5
Model 6P Cloudboy
One 6F re-engined with 1 220 hp (160 kW) Wright J-5 engine
YPT-9
Military production variant of the Model 6A with a 165 hp (123 kW) Wright J-6 Whirlwind 5 engine, four built (one converted to YPT-9A, one to YPT-9B, one to YBT-3 and one YBT-5).
YPT-9A
One YPT-9 re-engined with a 165 hp (123 kW) Continental A70 (YR-545-1) engine, later converted to YPT-9B.
YPT-9B
One YPT-9 and one YPT-9A re-engined with a 200 hp (150 kW) Lycoming R-680-3 engine.
YPT-9C
YBT-3 re-engined with a 170 hp (130 kW) Kinner YR-720A engine.
YBT-3
One YPT-9 re-engined with a 300 hp (220 kW) Wright J-6-9 Whirlwind, later converted to a YPT-9C.
YBT-5
One YPT-9 re-engined with a 300 hp (220 kW) Pratt & Whitney R-985-1 Wasp Junior engine.
XPT-943
A primary trainer derived from the 6A for evaluation at Wright Field. Formed the origins of the Stearman NS and PT-13 for the US Navy and USAAC respectively.
X-70
Alternative company designation for the XPT-943.

Operators

Flag of the United States (23px).png  United States
United States Army Air Corps

Surviving aircraft

Specifications (YPT-9B)

Data from United States Military Aircraft since 1909 [9]

General characteristics

Performance

See also

Related lists

Notes

  1. ↑ Phillips, Edward (2006). Stearman Aircraft: A Detailed History. North Branch, MN: specialtypress. pp. 95, 97, 106–108. ISBN   9781580070874.
  2. ↑ "Museum". Peach State Aerodrome. Archived from the original on 31 July 2018. Retrieved 25 November 2018.
  3. ↑ "FAA REGISTRY [N787H]". Federal Aviation Administration. U.S. Department of Transportation. Archived from the original on 25 November 2018. Retrieved 25 November 2018.
  4. ↑ "FAA REGISTRY [N788H]". Federal Aviation Administration. U.S. Department of Transportation. Archived from the original on 25 November 2018. Retrieved 25 November 2018.
  5. ↑ "1930 Stearman Cloudboy L-6 / YPT-9". Golden Wings Flying Museum. Retrieved 25 November 2018.
  6. ↑ "Stearman YPT-9B Cloudboy". Yanks Air Museum. Archived from the original on 26 November 2018. Retrieved 25 November 2018.
  7. ↑ "FAA REGISTRY [N795H]". Federal Aviation Administration. U.S. Department of Transportation. Archived from the original on 25 November 2018. Retrieved 25 November 2018.
  8. ↑ "FAA REGISTRY [N786H]". Federal Aviation Administration. U.S. Department of Transportation. Archived from the original on 25 November 2018. Retrieved 25 November 2018.
  9. ↑ Swanborough and Bowers 1963, p. 441.

References

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