|The Besler Steam Plane
|A Travel Air 2000 biplane made the world's first piloted flight
under steam power over Oakland, California, on 12 April 1933. The
strangest feature of the flight was its relative silence; spectators
on the ground could hear the pilot when he called to them from
mid-air. The aircraft, piloted by William Besler, had been fitted
with a two-cylinder, 150 hp reciprocating engine.