Military Wiki
1946 design then designated XA-44
Role Attack aircraft
Manufacturer Convair
First flight n/a
Status Cancelled in 1949
Primary user United States Air Force
Number built 0

The Convair XB-53 was a proposed jet-powered medium bomber aircraft, designed by Convair for the United States Army Air Forces.[1] With a radical tailless, forward-swept wing design, the aircraft appeared futuristic; however, the project was canceled before either of the two prototypes was completed.[1]

Design and development

The project was originally designated XA-44 in 1945 under the old "attack" category. An unusual forward-swept wing-design powered by three J35-GE turbojets, the project was developed in parallel with Convair's XB-46. It would have a wing with a 30° forward-sweep and 8° dihedral that was borrowed from German wartime research. The swept-forward configuration would give the aircraft a greater climb rate and maneuverability. It looked promising enough at one point for the Army Air Force to consider canceling the XB-46 in favor of the XA-44, since there was not enough funding for both.[1]

Classified as a medium bomber, the XB-53 would have carried up to 12,000 pounds of bombs as well as 40 High Velocity Aerial Rockets (HVAR) mounted on underwing pylons.[1]

Convair argued for completion of the XB-46 prototype as a flying testbed, sans armament and other equipment, and with the substitution of two XA-44s for the other two B-46 airframes on contract. The Air Force ratified this in June 1946 but the project did not progress, nor were additional B-46s built. The XA-44 was re-designated XB-53 in 1948 when the "attack" category was dropped, but the project was canceled before the two prototypes were completed. The XA-44 program was reinstated in February 1949 but only for a short while.

Specifications (XB-53 estimated)

Data from [2]

General characteristics

  • Crew: 4
  • Length: 79 ft 5 in (24.2 m)
  • Wingspan: 80 ft 9 in (24.6 m)
  • Height: 23 ft 8 in (7.22 m)
  • Wing area: 1,370 sq ft (127 m2)
  • Empty weight: 31,760 lb (14,406 kg)
  • Max takeoff weight: 60,000 lb (27,216 kg)
  • Powerplant: 3 × General Electric J35 turbojets, 4,000 lbf (18 kN) thrust each


  • Maximum speed: 504 kn; 933 km/h (580 mph)
  • Service ceiling: 44,000 ft (13,000 m)


  • Bombs: 12,000 lb (5,443 kg)

See also



  1. 1.0 1.1 1.2 1.3 "Fact sheet: Convair XB-53." National Museum of the US Air Force. Retrieved: 23 May 2010.
  2. Jones 1974, p. 1980–1982.


  • Andrade, John M. U.S. Military Aircraft Designations and Serials since 1909. Earl Shilton, Leicester: Midland Counties Publications, 1979. ISBN 0-904597-22-9.
  • Jones, Lloyd S. U.S. Bombers, B-1 1928 to B-1 1980s. Fallbrook, California: Aero Publishers, 1962, second edition 1974. ISBN 0-8168-9126-5.
  • Knaack, Marcelle Size. Encyclopedia of U.S. Air Force Aircraft and Missile Systems, Volume II - Post-World War II Bombers 1945-1973. Washington, D.C.: Office of Air Force History, USAF, 1988. ISBN 0-912799-59-5.
  • Wagner, Ray. American Combat Planes - Second Edition. Garden City, New York: Doubleday and Company, 1968. ISBN 0-370-00094-3.

External links

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