Bomb Nose Fuze

Nose Fuze AN-M103A1, shown in Fig 4-1, is cylindrical in shape, ca 2-inches in diameter and 7.23-in long (including the vane assembly). The fuze contains two explosive trains one for delay action, and another for instantaneous action. The delay action train consists of a primer, a delay element, 

It is aligned with one of the expl trains during arming operation and its final position depends upon how the setting pin is inserted 

When the fuzed bomb is dropped, the arming wire is retained in the bomb rack in order to free the arming vane assembly, thus causing it to rotate in the airstream. After traveling thru the air at a predetermined distance, the arming of delay mechanism is completed and further rotation unscrews the arming mechanism from the fuze 

If the fuze has been set for delay action (usually 0.1 sec), the detonator is aligned with the delay expl components. Impact fires the delay primer. The flash from the primer sets off the BkPdr delay element which burns thru and sets off, respectively, the relay, the detonator, the booster lead-in, the booster and the main charge of the bomb. More detailed description of the AN-M103A1 fuze, especially of its arming mechanism is given in Ref 51a, pp 4-1 to 4-6 

Nose Fuze AN-M103A1 is used in 1000-lb SAP Bomb AN-M59A1, in AN-M59 Bomb and in some other bombs. A cutaway view of bomb AN-M59A1, showing location of both nose and tail fuzes is given here in Fig 2-1. One of the tail fuzes, AN-M102A2 used with 

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Fig 4-8 BOMB NOSE FUZE, M157 (Installed in Igniter M15)... 

Bomb Nose Fuze, M111A2 is similar in appearance (but shorter in length) and operation to the fuzes AN-Ml46-series (shown here in Figs 4-27 4-28), except for the absence of the detonator slider and its cover plate and lock pin assembly. Its percussion primer is always in line with the firing pin. 

Bomb Nose Fuzes, AN-M146 are MT fuzes of the combined vane-armed, pin-initiated type. The impact element constitutes a self-destroying feature which operates only when the time setting exceeds the time of flight or in case the time mechanism fails to operate... 

Italian Bomb Nose Fuzes, Mechanical Time, pp 49 50 Types 1 T... 

Italian Bomb Nose Fuzes, Time, pp 144-45, 147-48 151-52 M900/14, M900/34, OT32, M06/17, M36 OT33 Nose Fuzes, Time and Percussion, pp 146-50 ADE M99, ADE M06, ADE M12,... 

US Bomb Nose Fuze Arming Type With Booster... 

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