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The Boeing XB-39 Superfortress was a United States prototype bomber aircraft, a single example of the B-29 Superfortress converted to fly with alternative powerplants.
XB-39 was a single example of the B-29 converted to fly with alternative powerplants. The aircraft was a modification of the first YB-29. Similar to the XB-38, the original Wright R-3350-21 piston radial engines were replaced with liquid-cooled Allison V-3420-11 V-engines.
Photos of the Boeing XB-39 was a development of the B-29 Superfortress using Allison V-3420-17 rather than Wright R-3350 engines.
In 1944, Fisher Body (General Motors) modified the YB-29 aircraft to produce the XB-39 "Lincoln Spirit" prototype bomber. Its basic form and function remain the same as the original Boeing design, but the engines are now centered around 4 x Allison V-3420-17 series liquid-cooled engines (the original B-29 relied on the aforementioned Wright air ...
Aircraft Version: MBB BO-105CB-4. C/n (msn): S-239. Operator Titles: Netherlands - Air Force. City / Airport: Kleine Brogel (EBBL) Map. Country:
Earlier, Lockheed had modified the Boeing B-17 with the Allison V-1710 in-line, liquid-cooled, twelve-cylinder engines to increase performance and power in the Lockheed XB-38 and the Boeing Company atttempted to do the same thing with the Boeing B-29.
29 lip 2020 · Page details technical specifications, development, and operational history of the Boeing XB-39 (Spirit of Lincoln) Heavy Strategic Bomber Prototype Aircraft including pictures.
