Specification of the Boeing B-29 Superfortress:
Powerplant:
Four Wright R-3350-23 Duplex Cyclone eighteen-cylinder air-cooled radial engines each with two General Electric turbosuperchargers, delivering 2200 hp for takeoff and having a war emergency rating of 2300 hp at 25,000 feet.
Performance:
Maximum speed 357 mph at 30,000 feet, 306 mph at sea level. Maximum continuous cruising speed 342 mph at 30,000 feet. Economical cruising speed 220 mph at 25,000 feet. Initial climb rate 900 feet per minute at combat weight. An altitude of 20,000 feet could be attained in 38 minutes. Service ceiling 33,600 feet. Maximum range was 3250 miles at 25,000 feet with 5000 pound bomb load. Practical operational radius was 1600-1800 miles. Maximum ferry range was 5600 miles, rising to 6000 miles with the extra fuel.
Weights:
74,500 pounds empty, normal loaded 120,000 pounds, maximum overload 135,000 pounds.
Dimensions:
Wingspan 141 feet 3 inches, length 99 feet 0 inches, height 27 feet 9 inches, wing area 1736 square feet.
Armament:
Twelve 0.50-inch machine guns in four remotely-controlled turrets (two above and two below the fuselage) and in the tail, each with 1000 rounds of ammunition. In addition, early production blocks had a single rearward-firing 20-mm M2 Type B cannon with 100 rounds in the tail position. Later, two more guns were provided for the forward top turret. Maximum internal short-range, low-altitude bomb load was 20,000 pounds. A load of 5000 pounds of bombs could be carried over a 1600-mile radius at high altitude. A load of 12,000 pounds of bombs could be carried over a 1600-mile radius at medium altitude.