[1][2] Stearman Aircraft developed the Model 4 from the C3, adding a deeper fuselage and offering a range of more powerful engines.

[3] Stearman sold the Model 4 to commercial operators in the United States, building 41 before ending production.

[5] 1930s socialite aviator Aline Rhonie flew NC796H (which still exists but is now registered as NC774H) out of Long Island, New York, before later joining the British war effort with the Air Transport Auxiliary.

[6] The aircraft's rugged construction helped it survive heavy handling and loads, and thirteen remained on the U.S. Civil Register in 1965.

Reference: Simpson[9] Canada United States Data from Green, 1965, p.298General characteristics Performance