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Stearman XA-21

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Title: Stearman XA-21  
Author: World Heritage Encyclopedia
Language: English
Subject: Stearman aircraft, Douglas A-26 Invader, A21, Stearman XBT-17, Boeing XAT-15
Collection: High-Wing Aircraft, Stearman Aircraft, Twin-Engined Tractor Aircraft, United States Attack Aircraft 1930–1939
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Stearman XA-21

Stearman XA-21 (Streamlined Cockpit)
Role Ground attack
Manufacturer Stearman
First flight 1938
Status Prototype
Primary user U.S. Army Air Corps
Number built 1

The Stearman Model X-100 was a competitor in an 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 1
  • Operational history 2
  • Operators 3
  • Specifications (XA-21) 4
  • See also 5
  • References 6
  • External links 7

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] It featured an unusual cockpit arrangement, much like those on most German World War II bombers designed during the war years, with a streamlined 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.


 United States

Specifications (XA-21)

In flight
Front view

Data from Museum of the United States Air Force[4]

General characteristics


  • Guns:
    • 4× wing-mounted 0.30 in (7.62 mm) M1919 Browning machine guns
    • 1× nose-mounted 0.30 in machine gun
    • 4× aft-firing 0.30 in machine guns
  • Bombs: 2,700 lb (1,200 kg)

See also

Related lists


  1. ^ "Stearman XA-21 (Stepped Cockpit)." Museum of the United States Air Force. Retrieved: 16 February 2011.
  2. ^ Bowers 1989, p. 273.
  3. ^ "Swift Attack Bombers Race For Jobs In Army Air Corps." Popular Mechanics, June 1939.
  4. ^ a b "Stearman XA-21 (Streamlined Cockpit)." Museum of the United States Air Force. Retrieved: 16 February 2011.
  • Bowers, Peter M. Boeing Aircraft since 1916. London: Putnam, Second edition, 1989. ISBN 0-85177-804-6.
  • Wagner, Ray. American Combat Planes of the 20th Century, Third Enlarged Edition. New York: Doubleday, 1982. ISBN 978-0-930083-17-5.

External links

  • "Stearman XA-21"
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