Between 1929 and 1932, the Army Air Corps received a total of 366 P-12s produced in six basic models: P-12 and series -B through -F. The P-12 was developed by Boeing, at their own expense, as the Model 89. The P-12 was also flown by the Navy as the F4B. Boeing used experienced gained during the construction of the XP-9, to develop a semi-monocoque all-metal fuselage version of the P-12 (Boeing Model 218). The Model 218 was tested with the designation XP-925 and resulted in an order for 135 more P-12s (-E and -F models).
TECHNICAL NOTES (P-12E): Armament: Two .30-cal. machine guns or one .30-cal. and one .50-cal.; 244 lbs. of bombs carried externally Engine: Pratt & Whitney R-1340-17 of 500 hp Maximum speed: 189 mph Cruising speed: 160 mph Range: 570 miles Length: 20 ft. 4 in. Span: 30 ft. 0 in. Height: 9 ft. 0 in. Maximum weight: 2,690 lbs.