Point Detonating PD Artillery Fuzes, Including

These fuzes, located in the forward parts of projectiles, are described in the 1967 edi- 

PDM9 is an Army SQ impact fuze which is used with 4.2-inch HE cartridge M3- It is identical with fuze M9 except that it has a booster instead of a burster tube. The function of the Tetryl booster in fuze M9 is to transmit the shock action to TNT filler in 

Functioning. No action takes place on firing until a prescribed centrifugal force has been set up by rotation of the projectile in its travel, whereupon the plunger pins (G) holding the rotor assembly (F) and those supporting the fire pin (I) move forward. 

Upon release from its detents, the rotor (C) revolves, bringing the detonator (D) into alignment with the firing pin (I) and the booster lead (B). Upon the outward movement of its plunger pins, the firing pin has an unobstructed passage to the detonator, but remains at the forward end of the fuze until impact, due to creep action. On impact 

PD M48A3 and M48A2 are selective SQ-delay types. Either action can be obtd, prior to firing, by turning a setting sleeve in the side of the fuze. These fuzes are similar in construction and action to Fuzes M51A5 and M51A4 (see next item), except that Fuzes M48 series do not include a booster (Ref 52, p 5-15 Ref 17, pp 152-53 Ref 20a, pp 282-83) 

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