DescriptionGun-type fission weapon numlabels.svg	Gun-type fission weapon (Little Boy). English:   Conventional explosive (cordite) used to throw the bullet. Gun barrel Hollow uranium "bullet" Cylinder target Alemannisch:   Gwöndlichä Sprängstoff (Kordit), zums Gschoss z beschleunigä Lauf Hohls Urangschoss Zylindrischäs "Ziel" Deutsch:   Konventioneller Sprengstoff (Kordit) zum Beschleunigen des "Geschosses" Lauf Hohles Urangeschoss Zylindrisches "Ziel" Français :   Explosif conventionnel (cordite) utilisé pour lancer la balle en uranium. Canon "Balle" creuse en uranium Cible cylindrique
Date	September 2007
Source	Based on an illustration by FastFission (Image:Gun-type Nuclear weapon.png) and a modified version by Howard Morland (Image:Gun-Type Fission Weapon.png). The bullet and the target were slighty modified (the bullet was a stack of rings).
Author	Vector version by Dake.
Permission (Reusing this file)	Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original. This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue
Other versions	(vector) - (bitmap) - (bitmap) - (vector)

The modification is based on the book by John Coster-Mullen, "Atomic Bombs," and his drawing on page 112 of the 2003 printing. His work is accepted and supported by other authors in this field including Richard Rhodes, Robert Norris, Carey Sublette, and Howard Morland.

Unlike all previous published drawings of this type, the Coster-Mullen drawing shows the hollow piece as the projectile, rather than the target. This modification also reverses the direction of motion in the FastFission drawing. FastFission has agreed to accept the modification. -- User:HowardMorland

Gun-type w:nuclear weapon ("w:Little Boy"), created by User:Fastfission in Adobe Illustrator.

This is not, of course, a technically accurate portrayal of the Little Boy weapon that was dropped on Hiroshima -- many aesthetic liberties have been taken for the purpose of explaining the gun-type concept (for example, as far as is known, the bullet fired from the rear of the device to the target in the front of the device, but if had been drawn that way, you could not see the hole in the target into which the bullet would fit). The purpose of this diagram is to explain the concept and still ground it in a real technological object; an attempt to have the benefits of abstraction without the detriment of forgetting that these are real objects. -- User:Fastfission

This image was improved or created by the Wikigraphists of the Graphic Lab (fr). You can propose images to clean up, improve, create or translate as well.