 Power was provided by a Pratt & Whitney R-1535 Twin Wasp Junior air-cooled radial engine driving with a variable-pitch propeller.Armament was planned to be two forward-firing M1919 Browning machine guns, one of which could be replaced by a M2 Browning; the prototype carried only a single gun.A single .30 in weapon was fitted in the rear cockpit for defense, and one bomb to be carried in a launching cradle under the fuselage.