The Porterfield Collegiate is an American-built two-seat training and touring monoplane built by the Porterfield Aircraft Corporation of Kansas City. Developed originally as the Porterfield Zephyr, under Approved Type Certificate (ATC) 2-530, it is a light-weight version of the earlier Model 35 Flyabout for use as a pilot trainer. Powered by a 40 hp (30 kW) Continental A-40 engine it was later re-designated the Porterfield CP-40. Though roughly in the same general class with the tandem-seat Piper Cub, Aeronca Champ, and Interstate Cadet -- and the side-by-side seating Aeronca Chief, Taylorcraft BC-12D and Luscombe 8 -- the tandem-seat Porterfield is visually distinguishable from them by its twin parallel wing struts on each side (compared to the V-shaped struts on the other planes), and by its largely symmetrical airfoil wing (similar curvature top and bottom). Number built 476 For details of development, production, operation history and 9 variants, click here.
