Thin Man

"Thin Man" was the code name for a proposed plutonium-fueled gun-type nuclear bomb that the United States partially developed during the Manhattan Project. Its development was abandoned in 1944 after it was discovered that the spontaneous fission rate of nuclear reactor-bred plutonium was too high for use in a gun-type design due to the high concentration of the isotope plutonium-240.

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The "Thin Man" plutonium gun being tested at Anchor Ranch, at Los Alamos, during World War II.

Thin Man plutonium gun bomb casings

Casings of "Thin man" nuclear bombs

An early scale model created for testing the ballistics of the "Thin Man" gun-type atomic bomb. These early tests used 14/23 scale models made from a standard 500 lb gravity bomb, a 14" diameter pipe, and a box tail. The results were extremely poor.

Type	Subtype	Date	Description	Notes	Source
commons	image		The "Thin Man" plutonium gun being tested at Anchor Ranch, at Los Alamos, during World War II.		Commons
commons	image		Thin Man plutonium gun bomb casings		Commons
commons	image		Casings of "Thin man" nuclear bombs		Commons
commons	image		An early scale model created for testing the ballistics of the "Thin Man" gun-type atomic bomb. These early tests used 14/23 scale models made from a standard 500 lb gravity bomb, a 14" diameter pipe, and a box tail. The results were extremely poor.		Commons