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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.
Boeing XB-39 „Spirit of Lincoln” – doświadczalna wersja amerykańskiego bombowca Boeing B-29 Superfortress używana jako latające laboratorium dla silników Allison V-3420. Zbudowano tylko jeden samolot.
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.
The Northrop YB-35/XB-35, Northrop designation N-9[1] or NS-9, [2] were experimental heavy bomber aircraft developed by the Northrop Corporation for the United States Army Air Forces during and shortly after World War II.
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.
Boeing XB-39 Bomber Prototype. The Boeing XB-39 was a development of the Boeing B-29 Superfortress, designed to prove that the B-29 could be powered by alternate engines if the preferred option was unavailable.
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.
