DATA:

BOMBS USED IN

FUNCTIONING

ARMED CONDITION

FUZED USED WITH

ARMING TIME

VANE SPAN

MAX. BODY DIAMETER

OVERALL LENGTH

MATERIAL

vane hub is of brass. Detonator cup may be of brass or plated

steel.

OPERATION:

Upon release from the plane an arming wire is pulled to allow the vanes to rotate in the air stream. The reduction gear carries this rotation to the arming screw, which un-threads from the striker to lift the vane cup. After 450-460 vane revolutions, the cap will be lifted high enough to allow the spring loaded safety discs to be expelled from be-neath the striker head. Additional rotation will cause the arming screw to thread out of the striker, allowing the arming mechanism to pull away from the bomb. Upon impact, the striker block is forced down, cutting the shear wire and forcing the two strikers aganist the firing assembly. If the setting pin is in the deep slot, the fuze is set for de-lay action and the striker point over the instantaneous channel merely protrudes into the empty recess with no effect; the delay cap being fired, setting off the delay and relay element, detonator, and bomb filler. If setting pin is in shallow slot, fuze is set for instantaneous action, and the instantaneous firing pin sets off the primer cap, detona-tor, and main filler, before the delay can function.

REMARKS:

No. 4 primer caps are used to initiate both trains of explosive. The delay channel and detonator assembly are as follows: delay train of 0.32 grains of black powder, the relay charge of 1.47 gains of lead azide.