 Grumman, having successfully provided the FF and F2F fighters to the Navy, along with the SF scout, submitted an advanced development of the SF-2 in response to the specification's request for a aircraft capable of carrying a bomb.Given the model number G-14 by Grumman, the aircraft received the official designation XSBF-1 by the Navy, and a contract for a single prototype was issued in March 1935.The XSBF-1 was a two-seat biplane, featuring an enclosed cockpit, a fuselage of all-metal construction, and wings covered largely with fabric.