Stearman XA-21
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The Stearman XA-21 (Model X-100) was a competitor in a United States Army Air Corps competition for a twin-engined attack aircraft which (after redesigns) led to the Douglas A-20 Havoc, Martin A-22 Maryland and North American B-25 Mitchell.
Design and development
The X-100, designated XA-21 following purchase by the Army Air Corps, was a twin-engined high-winged monoplane of all-metal construction.[1] Its initial design featured an unusual "stepless cockpit" arrangement, much like those on most German World War II bombers designed during the war years from the He 111P onwards, with a streamlined, well-framed greenhouse canopy enclosing both the pilot and bombardier stations.[2]
Operational history
The XA-21 was first tested with the streamlined cockpit but this configuration was found to restrict the pilot's forward vision, and the aircraft was rebuilt with a conventional (stepped) nose and cockpit structure.[3] Although this change in the cockpit did not significantly affect performance, the XA-21 was not ordered into production.'[4] The sole XA-21 had serial number 40-191.[5]
Operators
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Specifications (XA-21)
See also
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References
Notes
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- ↑ "Stearman XA-21 (Stepped Cockpit)." Museum of the United States Air Force. Retrieved: 17 July 2017.
- ↑ Bowers 1989, p. 273.
- ↑ "Swift Attack Bombers Race For Jobs In Army Air Corps." Popular Mechanics, June 1939.
- ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
- ↑ Script error: No such module "citation/CS1".
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Bibliography
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- Bowers, Peter M. Boeing Aircraft since 1916. London: Putnam, Second edition, 1989. Template:ISBN.
- Wagner, Ray. American Combat Planes of the 20th Century, Third Enlarged Edition. New York: Doubleday, 1982. Template:ISBN.
External links
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