- Stearman Cloudboy
__NOTOC__ Infobox Aircraft
name=Model 6 Cloudboy
caption=
type=Training biplane
manufacturer=Stearman Aircraft Company
designer=
first flight=1931
introduced=
retired=
status=
primary user=United States Army Air Corps
more users=
produced=1930-1931
number built=7
variants with their own articles=The Stearman Model 6 Cloudboy was a 1930s American training biplane designed and built by the Stearman Aircraft Company of Wichita, Kansas.Development
The Cloudboy was designed as a commercial or military trainer. It was a two-seat biplane with tandem open-cockpits and powered by nose-mounted 165hp (123kW)
Wright J-6 Whirlwind 5 engine. It had a fixed tailwheel landing gear. The aircraft was only built in small numbers due to the American economic climate in the early 1930s. Three civil aircraft were built followed by four similar aircraft for evaluation by theUnited States Army Air Corps . Designated the YPT-9 by the Army it failed to gain any orders. With only a few aircraft built they all went through a number of engine changes resulting in new designations for both the military and civil aircraft.Variants
;Model 6A Cloudboy:Initial civil production with a 165hp (123kW)
Wright J-6 Whirlwind 5 engine, three built.;Model 6C Cloudboy:Re-engined with a 300hp (224kW)Wright J-6-9 Whirlwind (R-975-1), also designated YBT-3.;Model 6D Cloudboy:Re-engined with a 300hp (224kW)Pratt & Whitney Wasp Junior , also designated YBT-5;Model 6F Cloudboy:Re-engined with a 165hp (123kW)Continental A70 engine., also designated YBT-9A.;Model 6H Cloudboy:Re-engined with a 170hp (127kW)Kinner YR-720A engine, also designated YBT-9C.;Model 6L Cloudboy:Re-engined with a 200hp (149kW)Lycoming R-680-3 engine, also designated YBT-9B;Model 6P Cloudboy:One 6F re-engined with 1 220hpWright J-5 engine;YPT-9:Military production variant of the Model 6A with a 165hp (123kW)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 165hp (123kW)Continental A70 (YR-545-1) engine, later converted to YPT-9B.;YPT-9B:One YPT-9 and one YPT-9B re-engined with a 200hp (149kW)Lycoming R-680-3 engine.;YPT-9C:YBT-3 re-engined with a 170hp (127kW)Kinner YR-720A engine.;YBT-3:One YBT-9 re-engined with a 300hp (224kW)Wright J-6-9 Whirlwind and fitted with an enclosed canopy, later converted to a YPT-9C.;YBT-5:One YBT-9 re-engined with a 300hp (224kW)Pratt & Whitney Wasp Junior engine.Operators
;USA:
United States Army Air Corps pecifications (YBT-9)
aerospecs
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met or eng?= engcrew=2
capacity=
length m=7.52
length ft=24
length in=8
span m=9.76
span ft=32
span in=0
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lift kg=
lift lb=eng1 number=1
eng1 type=Wright J-6 Whirlwind 5
eng1 kw= 123
eng1 hp= 165
eng1 kn=
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eng2 number=
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eng2 lbf-ab=max speed kmh=177
max speed mph=110
max speed mach=
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cruise speed mph=
range km=563
range miles=350
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*List of military aircraft of the United States References
*
*cite book |last= |first= |authorlink= |coauthors= |title= The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)|year= |publisher= Orbis Publishing|location= |issn=|pages=2958
*External links
* [http://www.aerofiles.com/_stear.html Aerofiles - Stearman]
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