File:LittleBoy Diagram.png

Summary
This image was created by George William Herbert on April 27, 2006, based on publicly available information on the Mark-1 Little Boy (Model 1850) gun-type nuclear bomb design (primarily Carey Sublette's Nuclear Weapons FAQ section 8, but also Rhodes, Hansen, Serber, et al.)

Reflector and fissile component dimensions have been completely omitted to avoid US Restricted Data status (not that you can't find them elsewhere...).

This image is released for Wikipedia or any other usage under the Creative Commons Attribution/Share Alike License version 2.5.