The Martin Model 234 was designed originally to meet a US Army Air Force requirement for a close-support bomber, being allocated the designation XA-45. However, it was developed instead as a medium bomber with turbojet power-plant and two prototypes were ordered under the designation XB-51. A cantilever mid-wing monoplane with swept wings and tail surfaces, it was powered by three 2640kg thrust General Electric J47-GE-7 or -13 turbo-jets, one pylon-mounted low on each side of the forward fuselage and the third within the rear fuselage. Other features included pressurised accommodation for the two-man crew, provisi-sions for JATO (jet-assisted take-off) units, and a braking parachute. The first was flown in 1949, but no production order resulted, despite outstanding reliability and handling.
Martin XB-51 on YOUTUBE
3-View
A three-view drawing (452 x 748)
Specification
ENGINE
3 x 2360kg General Electric J47-GE-13
WEIGHTS
Take-off weight
25393 kg
55982 lb
Empty weight
13431 kg
29610 lb
DIMENSIONS
Wingspan
16.18 m
53 ft 1 in
Length
25.93 m
85 ft 1 in
Height
5.28 m
17 ft 4 in
Wing area
50.91 m2
547.99 sq ft
PERFORMANCE
Max. speed
1038 km/h
645 mph
Cruise speed
857 km/h
533 mph
Ceiling
12344 m
40500 ft
Range
2576 km
1601 miles
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