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Home > Fact Sheets > Douglas XB-31
DOUGLAS XB-31
Posted 6/26/2009
Printable Fact Sheet
The Douglas XB-31 was the third of four engineering designs resulting from U.S. Army contracts issued on June 27, 1940. Two of the engineering designs (XB-29 and XB-32) resulted in prototype contracts; however, the XB-31, like the XB-30, was withdrawn from competition. The XB-31 never progressed past the basic engineering design phase.
The XB-31 design was never finalized, but the basic parameters were the same for all projects in the very long range bomber competition. The aircraft was to be powered by four Wright R-3350-13 radials of 2,200 hp each and had an estimated gross weight of 88,500 pounds. A crew of 12 was projected, but some Douglas design studies had as few as eight crew members.
| Type |
Number built/
converted |
Remarks |
| XB-31 |
0 |
B-29 competitor; never built |
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