Description
Base Detonating Fuzes M91 series are nondelay type used with HEAT-T cartridge in 105mm howitzers and with HEP cartridge in 106mm guns when tracer is required.
Fuzes of the M91 series consist of a steel head and body, brass booster cup, and a tracer, The head contains a spring-loaded plunger assembly with a rotor-mounted firing pin. The firing pin is retained in the unarmed position by spring-loaded safety pins. The body contains a detonator, a slider assembly with slider charge, a booster lead charge and a tetryl booster charge retained by a threaded cup. The tracer is contained in a steel or aluminum alloy cup threaded into the head. Bore safety is provided by the spring-loaded slider. In the unarmed position the slider acts as an interrupter, but in the armed position the slider charge is aligned between the detonator and the booster lead charge to become part of the detonation train.
Fuze M91 contains a M22 detonator and an integral press fit tracer. Fuze M91A1 contains a M22 detonator and a M5A2B1 tracer assembly. Fuze M91A2 contains a M58 detonator and a M5A2B1 tracer assembly.
Functioning
No information about functioning.
Hazardous Components
No information about hazardous components.
See Also
Nothing else to see.
Source(s)
Iraq Ordnance Identification Guide (2004)
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)
