The Mark 18 nuclear bomb, also known as the SOB or Super Oralloy Bomb, was an American nuclear bomb design which was the highest yield fission bomb produced by the US. The Mark 18 had a design yield of 500 kilotons. Nuclear weapon designer Ted Taylor was the lead designer for the Mark 18.
The Ivy King test firing of the Mark 18 SOB design
The Mark 18 was tested once, in the Ivy King nuclear test at the Enewetak atoll in the Pacific Ocean on November 16 1952. The test was a complete success at full yield.
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