Specifications for Boeing B-29A Superfortress:
Dimensions:
Wing span: 141 ft. 3 in (43.05 m)
Length: 99 ft. 0 in (30.17 m)
Height: 29 ft. 7 in (9.02 m)
Wing Area: 1,736 sq ft (529.13 sq m)
Weights:
Empty: 72,208 lb (32,752 kg)
Maximum Take-Off: 140,000 lb (63,502 kg)
Performance:
Maximum Speed: 399 m.p.h. (642 km/h) at 30,000 ft (9,144
m)
Service Ceiling: 23,950 ft (7,299 m)
Combat Ceiling: 36,150 ft (11,018 m)
Normal Range: 4,200 miles (6,759 km) (with 18,000 lbs.
(8,164 kg) bombs)
Powerplant:
Four Wright Aeronautical R-3350-57 Twin Row Radial 2,200
hp (1,640 kw) take-off, 2,500 hp (1,864) WE, Air Cooled
Armament:
Eight or twelve 50-cal. machine-guns. One 20mm cannon.
Maximum bomb Load: 20,000 lbs. (9,0710 kg).
Boeing B-29 Superfortress 
