Encyclopedia · Fuzes, primers, and ignition

Percussion fuze

A percussion fuze detonated an explosive projectile on impact rather than after a set time. Many patterns were used, generally relying on a plunger driven onto a primer at the moment of striking.

Also known as: percussion fuse, impact fuze.

In the Half Shell Book: This subject is treated in Civil War Artillery Projectiles: The Half Shell Book, pp. 13-23.
ClassPercussion
ActionDetonates on impact with the target
Common mechanismA plunger or slider driven onto a primer at the moment of striking
ExamplesParrott, Schenkl, Sawyer, Hotchkiss, Britten, and James patterns

Operation

A percussion fuze was designed to fire the projectile's bursting charge at the moment of impact. Most patterns worked on the same principle: firing set up or released a plunger, slider, or weight that was thrown forward when the projectile struck, driving it onto a percussion primer that ignited the charge.

Percussion fuzing suited rifled fire against fortifications, vessels, and hard targets, where a burst on impact was more effective than a timed air-burst. Both Federal and Confederate ordnance produced many patterns.

Patterns and identification

The war produced a wide range of percussion fuzes, among them the Parrott, Schenkl, Sawyer, Hotchkiss, Britten, and James types, made in brass, zinc, and other metals. Identification rests on the body form, threads, internal mechanism, and any maker's markings.

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Sources & further reading

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