Travel Air 2000

 
A 1920s biplane.

 

In 1933 a Travel Air 2000 was modified by George and William Besler where the usual inline or radial gasoline piston engine was replaced by an oil-fired, reversible 90° angle V-twin angle-compound engine of their own design, which became the first fixed-wing airplane to successful fly using a steam engine of any type. The Beslers are thought to have sold the plane to the Japanese in 1937.

Engine: Curtiss C-6, 160-hp (119-kW)