Description
These adjustable, delayed-arming fuzes are used in 75mm, 105mm, and 4.2 inch deep cavity projectiles fired 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 clock-work 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 sleeve, The setting ring and sleeve are metal, The slot in the setting ring is for time setting 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, M5, 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.
Fuze M513 has a steel sleeve. Fuze M513B1 has an aluminum sleeve.
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)
MIL-HDBK-146, Fuze Catalog (1982)
TM 9-1300-203, Artillery Ammunition (1967)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)
