Diagram of the Hiroshima Atomic Bomb with handwritten explanation of its components by the Weapons Officer on the Hiroshima mission
Category: World War II
Item Number: 12578
Hiroshima Bomb Diagram Jeppson
Little Boy was the code name of the atomic bomb which was dropped on Hiroshima, on August 6, 1945 by the 12-man crew of the B-29 Superfortress Enola Gay. 1 page black and white diagram showing the first atomic bomb with handwritten explanations of the components and how it works, in the hand of a crew member who dropped this bomb on Hiroshima, Enola Gay's Weapons Test Officer Jeppson. Jeppson was one of only 2 men who was both at Los Alamos during the development and testing of the bomb and also on board the Enola Gay when it dropped the bomb.
Here Morris Jeppson, the Weapons Officer of the Enola Gay, has made handwritten notations explaining the main different parts of this Atomic Bomb. He draws arrows, labeling the "target U235" where the "projectile 235" should hit the "target": and explains that it will "Become a critical mass with projectile". He adds labels to explain the location of the "electric detonator", the "gun barrel" and "one of 4 radar antennas." He signs at the bottom "Morris Jeppson / Weapon Test Officer / Enola Gay Mission / HIROSHIMA 6 Aug. 1945"