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The Boeing XB-15 (Boeing 294) was a United States bomber aircraft designed in 1934 as a test for the United States Army Air Corps (USAAC) to see if it would be possible to build a heavy bomber with a 5,000 mi (8,000 km) range. For a year beginning in mid-1935 it was designated the XBLR-1. When it first flew in 1937, it was the most massive and ...
XB-19A at Davis-Monthan Air Force Base before scrapping. The new U.S. Air Force had plans to save the XB-19 for eventual display, but in 1949 the Air Force did not have a program to save historic aircraft and the Air Force Museum had not yet been built. [10] [11] The XB-19 was therefore scrapped, but two of its enormous main tires were saved. [c]
The XB-38 was the result of a modification project undertaken by Vega (a subsidiary of Lockheed) on a Boeing B-17 Flying Fortress to fit it with liquid-cooled Allison V-1710-89 V-12 engines. It was to be an improved B-17, and an alternative if the normally fitted air-cooled Wright R-1820 radial engines became scarce. Completing the ...
Martin XB-27 heavy bomber: n/a: abandoned project: 0: Martin XB-33 Super Marauder heavy bomber: n/a: abandoned project: 0: Naval Aircraft Factory SBN dive bomber: 1936: retired 1942: 31: North American A-27 attack: 1940: retired 1941: 10: North American T-6 Texan light attack: 1940: retired: 15,495 [notes 4] North American XB-21 medium bomber ...
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. It was intended to demonstrate that the B-29 could still be put into service even if the first choice of engine, the air-cooled Wright R-3350 radial engine, ran into development or production difficulties.
The Boeing XB-55 (company designation Model 474) was a proposed Boeing aircraft designed to be a strategic bomber. The XB-55 was intended to be a replacement for the Boeing B-47 Stratojet in United States Air Force (USAF) service.
The XB-55 project had started in 1947, but by the end of the decade it was apparent that if strategic penetration in warfare were to be successful at all, it would require aircraft much faster than the jet fighter aircraft which were then being placed into operation. Thus, the funding made available by the XB-55 cancellation was earmarked for ...
In 1935, Boeing drafted several configurations of aircraft loosely based on both the Boeing XB-15 research and experience with the Boeing 314 Clipper aircraft. Each design was a "tailless" variation of those existing models with a flying wing layout, or a creative extension of the theme.