The Pitcairn "Mailwing" PA-5 : a single-seat commercial biplane
This 1927 technical report from NASA's Technical Reports Server, catalogued as a study of the Pitcairn Mailwing PA-5, a single-seat commercial biplane, is a government aeronautical document aimed at engineers and aviation researchers. Its photographs show the aircraft from several angles on an airfield, with a close view of a wing-bracing structure and an engine mount, giving a designer clear reference for early biplane form, strut layout and exposed radial engine detail.
