The Waco system of model designation takes some time to understand - the first letter identifies the engine type, the second the wing style, and the third the fuselage design. The Museum's aircraft was manufactured in 1937 at Troy, Ohio as a ZQC-6 model (285 hp Jacobs L-5MB engine) but was converted to an AQC-6 (330 hp Jacobs L-6MB) in 1947.