The Boeing B-29 Superfortress entered combat less than two years after its first flight in 1942. It was the largest bomber to go into production during the war and had the longest range. The B-29 used the high-speed Boeing 117 airfoil, and its larger Fowler flaps added to the wing area as they increased lift. Modifications led to the B-29D, upgraded to the B-50, and the RB-29 photo reconnaissance aircraft. The B-29 crew areas were pressurized and connected by a long tube over the bomb bays. The tail gunner had a separate pressurized area that could only be left during unpressurized flight.

The B-29 Superfortress had a top speed of 365 mph, a range of 5,830 miles and a ceiling of 31,850 feet.