Description
These adjustable, delayed-arming fuzes are used in deep cavity projectiles fired in 90mm and 120mm guns, 105mm howitzers, and 4.2-inch mortars against surface targets.
The fuze contains a radio continuous wave transmitter/detector with antennas and a power supply which performs the target detection function. A plastic nose cone is fixed to a rotatable setting ring with a single index line. The setting ring is connected to a clockwork timing mechanism within the fuze sleeve which energizes the proximity element upon approach to the target. The safety line, S, and graduations from 5 to 100, representing seconds to target are inscribed around the shoulder of the [text missing] only. Slots in the fuze sleeve are for the fuze wrench when assembling the fuze to the projectile. The fuze is shipped with the index mark set at "S". A fuze desensitizing metal cap, M59 may be pressed on the nose cone when the fuze is used with 105mm, HE cartridges, if burst heights are expected or observed to exceed 50 feet. The M5 cap reduces the burst height by a factor of about 4.
Models are similar in appearance but Fuze M513A2 has greater extreme temperature tolerance than Fuze M513A1.
Functioning
No information about functioning.
Hazardous Components
No information about hazardous components.
See Also
Proximity, M514, M514A1, M514B1
Source(s)
TM 43-0001-28, Artillery Ammunition (chg 11, 2003)
TM 9-1300-203, Artillery Ammunition (1967)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)
