Boeing B-29 Superfortress. The B-29 on display, Bockscar, dropped the Fat Man atomic bomb on Nagasaki on Aug. 9, 1945, three days after the atomic attack against Hiroshima. Bockscar was one of 15 specially modified "Silverplate" B-29s assigned to the 509th Composite Group. Most B-29s carried eight .50-cal. machine guns in remote controlled turrets, two .50-cal. machine guns and one 20mm cannon in a tail turret, and up to 20,000 pounds of bombs. Silverplate B-29s, however, retained only the tail turret and had their armor removed to save weight so that the heavy atomic bombs of the time could be carried over a longer distance.
TECHNICAL NOTES:
Armament: Eight .50-cal. machine guns in remote controlled turrets plus two .50-cal. machine guns and one 20mm cannon in tail; 20,000 lbs. of bombs
Engines: Four Wright R-3350s of 2,200 hp each
Maximum speed: 357 mph
Cruising speed: 220 mph
Range: 3,700 miles
Ceiling: 33,600 ft.
Span: 141 ft. 3 in.
Length: 99 ft.
Height: 27 ft. 9 in.
Weight: 133,500 lbs. maximum
Serial number: 44-27297