Description
Fuze M129 is used only with the fragmentation (butterfly) bomb. It is armed by the butterfly wings of the bomb and can be preset to detonate either in the air or instantaneously upon impact. Fragmentation bombs are assembled into clusters which require mechanical time fuzes for cluster opening. Approximately 50 feet of air travel is required to arm the fuze. If set for aerial burst, the fuze is detonated 2.5 seconds after arming. For ground burst, the delay train action is initiated after the fuze has completed 50 feet of air travel. Two and one-half seconds later, the delay train is halted and is not reactivated until impact occurs, resulting in detonation. The words AIR and GROUND are embossed on the outside of the fuze cap and indicate the position of the setting plug. The embossing is a distinguishing feature of this type of fuze and differentiates it from similar fuzes.
Functioning
No information about functioning.
Hazardous Components
Primer M41A1, Detonator M31, Tetryl booster.
See Also
Source(s)
MIL-HDBK-146, Fuze Catalog (1982)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)
TM 9-1325-200, Bombs and Bomb Components (1966)
OP 2216, Volume 1 - Aircraft Bombs, Fuzes, and Associated Components (1960)
OP 1664, Volume 2 - US Explosive Ordnance (1947)
USNBD - Bombs and Fuzes, Pyrotechnics (1945)
