 The Model 74 was a single radial engined high-wing monoplane with trailing-edge high-lift devices for low speed and high lift performance.The prototype aircraft was built with full-span leading-edge automatic slots manufactured by Handley Page, and slotted flaps.The Model V-74 was given the Army designation YO-49 for evaluation, with the first flight by test pilot Al Schramm on 15 July 1940.