Fat Man (Mk 3) Nagasaki Atomic Bomb:

Another Fat Man Atomic Bomb can be found at the West Point Military Museum in West Point, NY

Length: 128 inches
Diameter: 60 inches
Weight: 10,300lbs
Weight of Fissionable Plutonium: 30lbs, 2.5lbs of which actually fissioned
Explosive Yield: 18-48 kilotons
Configuration: Plutonium implosion bomb
Delivery Method: Boeing B-29 Superfortress BOCKSCAR
Est. # of Mk 3 Atomic Bombs Produced: 120
Target: Nagasaki, Japan
Delivery Date: August 9, 1945 11:02am JSP