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Douglas B-23 Dragon
The Douglas B-23 Dragon is a twin-engined bomber developed by the Douglas Aircraft Company as a successor to (and a refinement of) the B-18 Bolo.
==Design and development==
Douglas proposed a number of modifications designed to improve the performance of the B-18. Initially considered a redesign, the XB-22 featured 1,600 hp Wright R-2600-1 Twin Cyclone radial engines. The complete B-18 redesign was considered promising enough by the USAAC to alter the original contract to produce the last 38 B-18As ordered under Contract AC9977 as the B-23.〔 The design incorporated a larger wingspan with a wing design very similar to that of the Douglas DC-3, a fully retractable undercarriage, and improved defensive armament. Notably, the B-23 was the first operational US bomber equipped with a glazed tail gun position.〔Mondey 1982, p. 111.〕 The tail gun mounted a .50 caliber machine gun, which was fired from the prone position by a gunner using a telescopic sight.〔("Stinger Gun in Plane's Tail Guards Vulnerable Spot." ) ''Popular Science'', January 1941.〕
The first B-23 flew on July 27, 1939 with the production series of 38 B-23s manufactured between July 1939 and September 1940.
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