Description
Fuze, Proximity: M766 is used with Sergeant York Cartridge, HE, M822 for 40mm gun M247, It is used primarily against aerial targets.
The M766 Proximity Fuze is an electronic fuze that operates on the Doppler principle, It contains a combination of electronic and mechanical devices that provide a safe and reliable air defense munition, The electronic head of the fuze provides both safety and detonation. A mechanical safe and arm device (MS470 S&A) provides bore safety and maintains out of line safety until a safe arm distance is achieved. Electrical arming, which occurs well after muzzle exit, prevents an early ignition signal to the initiator. After electrical arming, the presence of a target that effects the proximity function will result in a firing signal output. The fuze also contains sensitive impact switches that provide fuze function on impact, and an electronic self destruct feature that results in detonation of the round after a fixed time period. A sensitivity regulation device is built into the fuze electronics, so that the triggering threshold is increased as the sea or ground reelection level increases, An inhibition channel (ECCM) allows operation in the presence of potentially interfering signals. The fuze consists principally of three subsystems: the electronic head, the safe and arm device (S&A), and the explosive train, The radome is made of thermoplastic material and the fuze body of aluminum. There are 3 modes of initiation: proximity, impact, and self destruct.
Functioning
No information about functioning.
Hazardous Components
No information about hazardous components.
See Also
Source(s)
TM 43-0001-28, Artillery Ammunition (chg 11, 2003)
