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Fat Man Replica of the original Fat Man bomb Type Nuclear fission gravity bomb Place of origin United States Production history Designer Los Alamos Laboratory Produced 1945–1949 No. built 120 Specifications Mass 10,300 pounds (4,670 kg) Length 128 inches (3.3 m) Diameter 60 inches (1.5 m) Filling Plutonium Filling weight 6.2 kg Blast yield 21 kt (88 TJ) "Fat Man" (also known as Mark III) was ...
Related: Iconic photos from WWII: Fat Man was the second nuclear weapon to be deployed in combat after the US dropped a 5-ton atomic bomb, called " Little Boy ," on the Japanese city of Hiroshima.
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The Trinity bomb was officially a Y-1561 device, as was the Fat Man used later in the bombing of Nagasaki. The two were very similar, though the Trinity bomb lacked fuzing and external ballistic casing. The bombs were still under development, and small changes continued to be made to the Fat Man design. [59]
The Mark 4 nuclear bomb was an American implosion-type nuclear bomb based on the earlier Mark 3 Fat Man design, used in the Trinity test and the bombing of Nagasaki.With the Mark 3 needing each individual component to be hand-assembled by only highly trained technicians under closely controlled conditions, the purpose of the Mark 4 was to produce an atomic weapon as a practical piece of ordnance.
The 1945 photo shows Manhattan Project physicist Harold Agnew holding the heart of one of the most devastating weapons in the world.
Replacing the pump would take hours; moving the Fat Man to another aircraft might take just as long and was dangerous as well, as the bomb was live. Group Commander Colonel Paul Tibbets and Sweeney therefore elected to have Bockscar continue the mission. [11] [12] Preserved Tinian "bomb pit #2", where Fat Man was loaded aboard Bockscar
Atom Bombs: The Top Secret, Inside Story of Little Boy and Fat Man John Coster-Mullen (21 December 1946 – 24 April 2021) was an American industrial photographer, truck driver and nuclear archaeologist who played an important role in creating a public record of the design of the first atomic bombs .