| B-23 Dragon / UC-67 | |
|---|---|
 | |
| A B-23 Dragon in USAAC markings during the early 1940s | |
| Role | Medium bomber |
| National origin | United States |
| Manufacturer | Douglas Aircraft Company |
| First flight | 27 July 1939 |
| Primary user | United States Army Air Corps |
| Number built | 38 |
| Developed from | Douglas B-18 Bolo |
The Douglas B-23 Dragon is an American twin-engined bomber developed by the Douglas Aircraft Company as a successor to (and a refinement of) the B-18 Bolo.
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. [1] The design incorporated a larger wingspan with a wing design very similar to that of the DC-3, a fully retractable undercarriage, and improved defensive armament. The B-23 was the first operational American bomber equipped with a glazed tail gun position. [1] The tail gun was a .50 calibre (12.7 mm) machine gun, which was fired from the prone position by a gunner using a telescopic sight. [2]
The first B-23 flew on July 27, 1939 with the production series of 38 B-23s manufactured between July 1939 and September 1940. [3]
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While significantly faster and better armed than the B-18, [4] the B-23 was not comparable to newer medium bombers like the North American B-25 Mitchell and Martin B-26 Marauder. For this reason, the 38 B-23s built were never used in combat overseas, although for a brief period they were employed as patrol aircraft stationed on the west coast of the United States. [1] The B-23s were primarily relegated to training duties, although 18 of them were later converted as transports and redesignated UC-67 [4]
The B-23 also served as a testbed for new engines and systems. For example, one was used for turbosupercharger development by General Electric at Schenectady, New York. Another was used for testing cabin pressurization. [5]
After World War II, many examples were used as executive transports, with appropriate internal modifications, and as a result a large number have survived, both in public and private collections. [4] Howard Hughes (among others) used converted B-23s as personal aircraft.
United States 
Data from McDonnell Douglas Aircraft since 1920 [17]
General characteristics
Performance
Armament
Related development
Aircraft of comparable role, configuration, and era
Related lists
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