National Museum of the USAF   Right Corner Banner
Join the Air Force

Home > Fact Sheets > Stearman XA-21 (Stepped Cockpit)

STEARMAN XA-21 (STEPPED COCKPIT)

Posted 12/30/2008 Printable Fact Sheet
 
Photos
Previous ImageNext Image
Stearman XA-21
Stearman XA-21 in flight. (U.S. Air Force photo)
Download HiRes

The Army Air Corps requested design proposals from five aircraft manufacturers for a twin-engine light attack bomber in the late 1930s. Stearman submitted its model X-100. The Air Corps did not order any production aircraft, but did buy the prototype and designate it XA-21. The aircraft originally had a streamlined greenhouse nose compartment covering both the pilot and bombardier's positions; however, the forward vision of the pilot was restricted by the arrangement and the Air Corps requested a change to a more conventional nose. Stearman, which by this time had become a division of Boeing, modified the aircraft and returned it to Wright Field for further flight testing.

The top speed of the XA-21 was slightly reduced with the new nose, but the overall performance of the aircraft was roughly the same as with the original nose. Although the Stearman XA-21 wasn't ordered into production, some of its design competitors had better luck. The North American NA-40 eventually evolved into the B-25 Mitchell. The Martin Model 167F wasn't ordered by the Army, but was successful as an export attack aircraft becoming the Maryland when in service with the Royal Air Force. The Douglas Model 7B became the A-20.


Type Number built/
converted
Remarks
XA-21 1 Attack bomber prototype


TECHNICAL NOTES:
Armament: Provisions for four wing-mounted .30-cal. machine guns, one nose-mounted .30-cal. machine gun and four rear-firing .30-cal. machine guns (dorsal, left waist, right waist and ventral) plus 2,700 lbs. of bombs
Engines: Two Pratt & Whitney R-2180-7 radials of 1,400 hp each at takeoff power
Maximum speed: 257 mph
Cruising speed: 232 mph
Combat range: 720 miles with 1,200 lbs. of bombs
Maximum range: 1,500 miles
Service ceiling: 20,000 ft.
Span: 65 ft. 0 in.
Length: 53 ft. 1 in.
Height:
14 ft. 2 in.
Weight: 18,230 lbs. gross weight
Crew: Three (pilot, bombardier, and radio operator/gunner)
Serial number: 40-141

Click here to return to the Attack Aircraft index.







 Inside the Museum

ima cornerSearch

ima cornerAircraft

 


tabCategories
tabRelated Links
tabConnect

Museum Virtual TourMuseum Facebook PageMuseum Twitter PageMuseum Instagram
Museum Google Plus PageMuseum Pinterest PageMuseum YouTube ChannelMuseum Flickr Page
Museum PodcastsMuseum E-newsletter Sign-upMuseum RSS Feeds



Site Map      Contact Us     Questions     USA.gov     Security and Privacy notice     E-publishing  
Suicide Prevention    SAPR   IG   EEO   Accessibility/Section 508   No FEAR Act