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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 ...
The Bockscar and its crew, who dropped a Fat Man atomic bomb on Nagasaki. The city of Nagasaki had been one of the largest seaports in southern Japan, and was of great wartime importance because of its wide-ranging industrial activity, including the production of ordnance, ships, military equipment, and other war materials.
The mission included three B-29 bombers and their crews: Bockscar, The Great Artiste and The Big Stink. Bockscar was flown on 9 August 1945 by Crew C-15, which usually manned The Great Artiste; piloted by Major Charles W. Sweeney, commander of the 393d Bombardment Squadron; and co-piloted by First Lieutenant Charles Donald Albury, C-15's aircraft commander. [7]
Weighing 14 pounds and responsible for 80,000 deaths, the heart of the "Fat Man" atomic bomb was detonated on August 9, 1945, over the Japanese city of Nagasaki. Related: Iconic photos from WWII:
Fat Man was a strategic nuclear weapon dropped on the Japanese city of Nagasaki during the final stages of World War II. It was the second and last (as of January 12, 2025) nuclear weapon to be used in combat. The nuclear strike killed an estimated 35,000–40,000 people outright, including 23,200–28,200 Japanese civilian factory workers ...
For both the Trinity device and the Fat Man (Nagasaki) bomb, nearly identical plutonium fission through implosion designs were used. The Fat Man device specifically used 6.2 kg (14 lb), about 350 ml or 12 US fl oz in volume, of Pu-239, which is only 41% of bare-sphere critical mass (see Fat Man article for a detailed drawing).
The EBW was invented by Luis Alvarez and Lawrence Johnston for the Fat Man–type bombs of the Manhattan Project, during their work in Los Alamos National Laboratory.The Fat Man Model 1773 EBW detonators used an unusual, high reliability detonator system with two EBW "horns" attached to a single booster charge, which then fired each of the 32 explosive lens units.
A replica of the "Fat Man" atom bomb design similar to the "Third Shot" bomb. The Third Shot was the first of a series of American nuclear weapons intended for use against Japan in World War II, subsequent to the nuclear attacks on Hiroshima and Nagasaki. It was intended to be used on 19 August 1945, ten days after the bombing of Nagasaki. [1]