Description
Nose fuzes of this type are armed by mechanical time mechanisms. Detonation after release can be preset; time settings range from 5 to 92 seconds. Should the time setting be greater than flight time of the bomb, impact will cause the fuze to function instantaneously, provided it is armed. It takes air travel of 1000 to 1300 feet to arm these fuzes. Fuzes AN-M145A1, AN-M146A1 and AN-M147A1 are identical except for their boosters. The AN-M146A1 has a booster containing black powder; the AN-M145A1 and AN-M147A1 have boosters containing tetryl and a tetryl lead charge. The fuzes have low temperature clockwork mechanisms. These fuzes are detonator safe. A spinner device to force safety blocks to rotate with the arming vane assures positive ejection of the safety block after the arming sleeve has withdrawn.
A detonator, a booster lead-in and a booster constitute the explosive components of this type fuze. The detonator is held out of alignment until arming occurs.
Functioning
No information about functioning.
Hazardous Components
M19A2 detonator, Tetryl lead charge (5.6 grains), Tetryl booster (7.6 grains)
See Also
Nose, MT, M111, M111A1, M111A2
Source(s)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)
TM 9-1325-200, Bombs and Bomb Components (1966)
OP 1664, Volume 2 - US Explosive Ordnance (1947)
USNBD - Bombs and Fuzes, Pyrotechnics (1945)
