Fat Man

This weapon casing is identical to that used for the Fat Man Atomic bomb.

Fat Man was the second, and last nuclear weapon used in warfare. Dropped on Nagasaki, Japan on August 9, 1945, Fat Man devastated more than two square miles and caused more than 45,000 immediate deaths. Fat Man was an implosion device. Several thousand pounds of conventional high explosives surrounded a ball shaped, sub-critical mass of plutonium (Pu-239). At the time of detonation, implosion - which had been tested at the Trinity Site - again took place. The plutonium then went into the supercritical stage. It exploded with the force of approximately 20 kilotons of TNT.

Length	10 feet 8 inches (3.25 m)
Diameter	60 inches (1.52 m)
Weight	10,800 pounds (4898.8 kg)
Yield	20 kilotons

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