Projectile used in

Over-all length

Maximum diameter

Thread diameter

Markings

This fuze is very similar to the Nose Time Fuze M900/34 and M900/14 in shape and ope-ration, and is only slightly different in construction. There are two types, one with a ta-pered projection at the base and the other with the end flash with the screw threads. Setting graduations extend from 0 to 13.2. The fuze set to 13 gave burning time of 26.6 seconds at rest. A soldered alloy cover with tear-off wire and ring is sometimes fitted to the fuze. The fuze is made of aluminum and has a locked upper time ring and lower de-justable ring for setting. Both time rings are held down by a tension cap which screws onto the forward end of the fuze. The detonator holder with a split brass ring and the firing are located in the recess in the forward portion of the fuze.

On acceleration, detonator holder sets back through the split brass ring, and the deto-nator is impinged on the firing pin. The flash produced passes through the flash channel in the recess and ignites the powder in the flash channel in the upper ring, thus igniting the fuze powder, which starts to burn along the groove. The pressure set up by the burning fuze powder dislodges the closing disc of the first vent, and thus prevents varia-tion in rate of burning as the result of heat and pressure. The distance between the commencement of the powder groove in the upper ring and the powder-filled flash-hole depends on the angle through which the lower ring is turned in setting. When the fuze powder has burned around to the flash-hole in the lower ring, the lower ring ignites and burns around to the delay in the base of the fuze. From the delay, the flash is passed on to the solid powder pellet in the flash channel, and then to the main charge.

Figure 215
Nose Time Fuze O.T. 32