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Martin B-57 Canberra

Role Tactical bomber
Manufacturer Martin
First flight 20 July 1953
Introduction 1954
Retired 1983 (USAF)1985 (Pakistan)
Status Retired from military service; 3 in use by NASA
Primary users United States Air Force
Pakistan Air Force
Republic of China Air Force
Number built 403
Developed from English Electric Canberra
Variants Martin RB-57D Canberra
Developed into Martin/General Dynamics RB-57F Canberra
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History Martin Aircraft Company
Martin B-57 Canberra



The Martin B-57 Canberra is an American-built, twin-engined tactical bomber and reconnaissance aircraft that entered service with the United States Air Force (USAF) in 1953. The B-57 is a license-built version of the British English Electric Canberra, manufactured by the Glenn L. Martin Company. Initial Martin-built models were virtually identical to their British-built twinjet counterparts; Martin later modified the design to incorporate larger quantities of US-sourced components and produced the aircraft in several variants

The B-57 Canberra holds the distinction of being the first jet bomber in U.S. service to drop bombs during combat.[3] The Canberra was used extensively during the Vietnam War in a bombing capacity; specialized versions of the type were also produced and served as high-altitude aerial reconnaissance platforms (the Martin RB-57D Canberra), and as electronic warfare aircraft. The B-57 Canberra was also sold to export customers abroad; further combat use was seen by the Pakistani Air Force during the Indo-Pakistani War of 1965 and the Indo-Pakistani War of 1971..

Further development

B-57B Canberras of the 345th Bombardment Wing in flight, 1957
In place of the curtailed B-57A, a more refined bomber variant, the B-57B, was developed. Having a more lengthy development time, this model incorporated the structural and system changes that had been recommended by WADC, which resulted in the aircraft being more adaptable than its B-57A predecessor. Of the external changes, the most significant was the adoption of a fighter-style canopy accompanied by a flat-panel windshield and a tandem seating arrangement, providing for greater transparency and an improved view for both the pilot and navigator, as well as allowing for a gunsight to be equipped. The corresponding glazed bombing nose of the B-57A was deleted along with the starboard crew entrance to the cockpit..

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Martin B-57 Canberra

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General characteristics

    • Crew: 2 (pilot, navigator)
    • Length: 65 ft 6 in (20.0 m)
    • Wingspan: 64 ft 0 in (19.5 m)
    • Height: 14 ft 10 in (4.52 m)
    • Wing area: 960 sq ft (89 m2)
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Powerplant

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Specifications

    • Maximum speed: 598 mph (960 km/h, 520 kn) at 2,500 ft (760 m)
    • Maximum speed: Mach 0.79
    • Cruise speed: 476 mph (765 km/h)
    • Stall speed: 124 mph (200 km/h
    • Combat range: 950 mi (1,530 km, 825 nmi) with 5,250 lb (2,380 kg) of bombs
    • Ferry range: 2,720 mi (4,380 km,
    • Service ceiling: 45,100 ft (13,745 m)
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Performance

  • Guns:20 mm (0.787 in) M39 cannon, 290 rounds/gun
  • Bombs: ** 4,500 lb (2,000 kg) in bomb bay, including nuclear bombs
    • 2,800 lb (1,300 kg) on four external hardpoints, including unguided rockets
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