The B-36 is the largest bomber and the last piston engine powered bomber produced by the United States. First designed to meet a World War II requirement for a plane capable of hitting targets in Germany from bases in the United States the prototype did not fly until August 8, 1946.
The tricycle gear conversion to the Model 18 gave the aircraft significantly better ground handling characteristics. Because the aircraft was now close to its in-flight attitude while sitting on the ground, a new doorway with integrated stairs was made to assist ingress and egress. It also meant greater passenger comfort while boarding and during ground maneuvers as the aircraft's floor was no longer on an incline, but level with the ground.
