Douglas B18 to the right of the C124. The Douglas Aircraft Co. developed the B-18 to replace the Martin B-10 as the U.S. Army Air Corps' standard bomber. Based on the Douglas DC-2 commercial transport, the prototype B-18 competed with the Martin 146 (an improved B-10) and the four engine Boeing 299, forerunner of the B-17, at the Air Corps bombing trials at Wright Field in 1935. Although many Air Corps officers judged the Boeing design superior, the Army General Staff preferred the less costly Bolo (along with 13 operational test YB-17s). The Air Corps later ordered 217 more as B-18As with the bombardier's position extended forward over the nose gunner's station.
TECHNICAL NOTES:
Armament: Three .30-cal. guns (in nose, ventral and dorsal positions), plus 4,500 lbs. of bombs carried internally
Engines: Two Wright R-1820-53s of 1,000 hp each
Crew: Six
Maximum speed: 215 mph at 15,000 ft.
Cruising speed: 167 mph
Range: 2,100 miles
Ceiling: 23,900 ft.
Span: 89 ft. 6 in.
Length: 57 ft. 10 in.
Height: 15 ft. 2 in.
Weight: 27,000 lbs. loaded
Serial number: 37-0469