Really frustrated because i had to remake this after it got corrupted but anyway: http://www.aviation-central.com/1919-1939/ada20.htm reads: The B-10 was the first "modern-day" all-metal monoplane bomber to be produced in quantity. It featured such innovations as internal bomb storage, retractable landing gear, a rotating gun turret, and enclosed cockpits. It was 50% faster than its contemporary biplane bombers and as fast as most of the fighters. When the Air Corps ordered 121 B-10s in the 1933-1936 period, it was the largest procurement of bomber aircraft since WW I. It also ordered 32 B-10 type bombers with Pratt and Whitney rather than Wright engines and designated these B-12s. General Henry H. "Hap" Arnold once called the B-10 the air power wonder of its day. In 1934, he led ten B-10s on a 8,290 mile flight from Washington, D.C. to Fairbanks, Alaska and back. Although Air Corps B-10s and B-12s were replaced by B-17s and B-18s in the late 1930s, China and the Netherlands flew export versions in combat against Japan. . Normal controls.