The B90 was an American thermonuclear bomb designed in the mid to late 1980s and cancelled prior to introduction into military service. The mushroom cloud of the atomic bombing of Nagasaki, Japan, 1945, rose some 18 km (11 mi) above the hypocenter. ...
The B90 design was intended for use as a naval aircraft weapon, for use as a nuclear depth bomb and as a land attack strike bomb. It was intended to replace the B57 nuclear bomb used by the Navy. The B90 bomb design entered Phase 3 development engineering and was assigned its numerical designation in June 1988. The B57 nuclear bomb was a low-yield tactical nuclear weapon used by the United States during the Cold War. ...
The B90 was 13.3 inches in diameter and 118 inches long, and weighed 780 pounds. The B90 had a design yield of 200 kilotons. A megaton or megatonne is a unit of mass equal to 1,000,000 metric tons, i. ...
The B90 was cancelled in September 1991 along with the W89 and W91 nuclear warheads and AGM-131 SRAM II and SRAM-T missile models. No B90 production models were built, though test units may have been; US nuclear weapon testing continued until 1992. The W91 was an American thermonuclear warhead intended for use on the SRAM-T variant of the AGM-131 SRAM II air to ground missile. ... The SRAM II (Short-Range Attack Missile) was a nuclear air-to-surface missile intended as a replacement for the AGM-69 SRAM, but it was cancelled by President George H.W. Bush for geopolitical reasons just as the first flight-test missile was delivered. ... The SRAM II (Short-Range Attack Missile) was a nuclear air-to-surface missile intended as a replacement for the AGM-69 SRAM, but it was cancelled by President George H.W. Bush for geopolitical reasons just as the first flight-test missile was delivered. ...
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