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Image: HotchkissMkIVBasePercussionFuze

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Description: Diagram of British Hotchkiss Mk IV base percussion fuze. Body is of copper alloy Class A. Height approximately 40mm, diameter 25mm (widest), 12.5mm (narrowest), 17mm (cap). Action : On shock of discharge, the pellet sets back over the needle holder, thus allowing the steel needle to project beyond it. The alloy at the bottom of the pellet cushions against the bottom of the fuze, and a small portion of it dovetails into the undercut recess, round the base of the needle. This forms a weak connection between the pellet and fuze body, and assists the spring in checking rebound action. On graze or impact the pellet and needle set forward, the needle pierces the detonator, and the flash passes through to the bursting charge of the shell. For use with Common and Steel shells in the following guns : QF 3 pounder Hotchkiss QF 6 pounder Hotchkiss
Title: HotchkissMkIVBasePercussionFuze
Credit: Figure 85, Page 298-299, 304 in "Treatise on Ammunition" 10th Edition, 1915 Facsimile reprint by Imperial War Museum and Naval & Military Press, 2003
Author: War Office, UK
Permission: Crown Copyright expired (50 years)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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