 After testing the XF12C-1 was rejected as a fighter, and on 7 December 1933 this aircraft was redesignated in the scout category as the XS4C-1 and re-engined with a 700 hp (522 kW) Wright R-1820-80 radial engine driving a two-blade propeller.In its role as a scouting aircraft, bombing equipment for a 500-pound (227-kilogram) bomb had to be designed and provided.In January 1934 the designation scout bomber (SB) was introduced and the aircraft was finally redesignated XSBC-1.