Stearman Aircraft Inc.

Probably the most produced single-engine biplane in US history, Stearman’s PT-13/17 and NS-/N2S-series trainers began as a Stearman private venture during 1934, the same year the company became a Boeing subsidiary. An immediate success, these first aircraft would serve as the progenitors of a long line of similar trainers with well over 8,000 being completed by World War II’s end. A switch to the Continental R670-5 gave birth to the definitive PT-17