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Proximity fuse MK53 removed from shell, circa 1950s. A Proximity Fuse (also VT fuse [1] [2] [3] or "variable time fuze") is a fuse that detonates an explosive device automatically when it approaches within a certain distance of its target.
Mk 53 Proximity fuze for an artillery shell, circa 1945. The benefits of a fuze that functioned when it detected a target in proximity are obvious, particularly for use against aircraft. The first such fuze seems to have been developed by the British in the 1930s for use with their anti-aircraft 'unrotated projectiles' – rockets.
M734 fuze cross section Amplifier (top) and oscillator. The M734 multi-option fuze [1] is a rangefinder and collision detection system used on 60 mm, 81 mm, and 120 mm mortar shells as a trigger to detonate the shells at the most damaging heights of burst when combating four types of battlefield threats:
Mk 53 Proximity fuze for an artillery shell, c. 1945 Proximity fuzes cause a missile warhead or other munition (e.g. air-dropped bomb, sea mine , or torpedo ) to detonate when it comes within a certain pre-set distance of the target, or vice versa.
An aerial shell loaded with many such pieces results in a myriad of pieces flying and sparking high in the air. A spolette is a delay fuse consisting of a hollow wooden dowel or a paper tube rammed full of black powder. A spolette is glued into the wall of a fireworks shell and ignited by the lift charge that launches the shell into the air.
The M982 Excalibur was fielded as a guided shell that effectively hit within 6 m (20 ft) of a target, but the Army developed the XM1156 as a cheaper alternative. The PGK fuse can be screwed onto existing M549A1 and M795 projectiles, be fired from M109A6 Paladin and M777A2 Howitzer artillery systems, and hits within 50 m (160 ft) of the target ...
PFF: anti-missile projectile, with proximity fuze and tungsten balls embedded in the shell for defined fragmentation effect; SAPOM: 6.35 kg (0.46 kg HE), range 16 km (SAPOMER: 20 km) semi-armour piercing; DART: guided projectile for anti-aircraft and anti-missile manoeuvering targets [12]
The proximity fuze was a small device on an artillery shell that would detonate the shell when close to the target, without requiring a difficult direct hit. [3] Previously fuzes had releid on a time or altitude setting in the fuze and an estimated target height close enough that the shrapnel cloud would impact the target.
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