Displayed at the Museum is an exact replica of Little Boy, the bomb that destroyed Hiroshima, Japan, on August 6, 1945, during World War II.
Little Boy was a relatively simple enriched-uranium weapon designed and built at Los Alamos. Little Boy consisted of two pieces of uranium separated in the barrel of a gun. It exploded when the projectile was fired at the the target piece, creating a total mass that was supercritical, or able to sustain a nuclear chain reaction resulting in an explosion.
Weight - 9,700 pounds
Length - 120 inches
Diameter - 29 inches
Yield -15 Kt, equivalent to 15,000 tons of TNT
Fissile material - Uranium-235
