Boeing P-12E. Developed by the Boeing Aircraft Co. at its own expense, the P-12 was became one of the most successful American fighters produced between the World Wars. Flown by both the Army and the Navy (as the F4B), the P-12 series consisted of an initial version and five additional models, B through F. The early versions used fabric-covered fuselages of bolted aluminum tubing, but the P-12E and F fuselages employed an all-metal, semimonocoque (stressed skin) construction. However, the P-12 did not complete the evolution into an all-metal aircraft because all variants had wooden wings with fabric covering.
TECHNICAL NOTES:
Armament: Two .30-cal. or one .30-cal. and one .50-cal. machine guns; 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
Ceiling: 26,300 ft.
Span: 30 ft.
Length: 20 ft. 4 in.
Height: 9 ft.
Weight: 2,690 lbs. loaded
Serial number: 31-559