Boeing XB-56
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The Boeing XB-56 was a proposal by Boeing for a re-engined version of the American jet-powered medium bomber aircraft, the B-47 Stratojet. The original designation for this modification was YB-47C.
Picture of a B-47E. Clearly visible are the four engine nacelles with the six engines, which were to be replaced by four uniform nacelles and engines
Boeing B-52 Stratofortress
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The Boeing B-52 Stratofortress is an American nuclear-capable subsonic jet-powered strategic bomber. The B-52 was designed and built by Boeing, which has continued to provide support and upgrades. It
Boeing XB-56
…B-56A. The Pratt & Whitney J57, eventually rated at 17,000 lbf (76 kN) thrust, was also considered, but that engine was still in development, and the Boeing B-52 Stratofortress, which was being concurrently developed (first flight was April 1952), had priority for this engine. The B-56 program was canceled in December 1952…
A B-52H from Barksdale AFB flying over Texas
XB-52 prototype on flight line (X-4 in foreground; B-36 behind). Note original tandem-seat "bubble" style canopy, similar to Boeing's earlier B-47 Stratojet.
Side view of YB-52 bomber, still fitted with a tandem cockpit, in common with other jet bombers in US service, such as the B-45 Tornado, B-47 Stratojet and Martin B-57 Canberra
B-52H Stratofortress undergoing maintenance to its rudder with its fin folded