Nose Pistol No. 19 Mk I and II, and No. 20 Mks I - III (Obsolescent)

Description: The pistol consists of an aluminum upper body and a brass lower body which are bored to receive the striker. The striker has a flange, which can move in an enlarged channel in the lower body. There is a 5/32-in. brass shear pin through the strik-er and the upper body, holding the striker up. On the upper part of the striker is a pres-sure plate, which is screwed on and which has eight notches in its circumference. The vane cap, to which is riveted the vane bush and the vanes, threads into the upper part of the striker. The vane cap and pressure plate are provided with stop pins to prevent the vane cap from screwing down and binding on the pressure plate. Opposite sides of the vane cap are cut away to receive the safety clip, in which is a clip spring that goes around the striker to hold the safety clip on. The stop pin of the safety clip fits into one of the notches in the pressure plate. A safety pin goes thriugh the ends of the arms of the safety clip.

Operation: The safety pin is pulled when the bomb is put in the plane, as is the safety clip when the bomb is released. The vanes and vane cap are them free to rotate, and fall off after six revolutions, leaving the end of the striker and the pressure plate ex-posed. On impact the shear wire is sheared, and the firing pin forced against the detona-tor.

Remarks: The Fuzes No. 20 are similar to the No. 19, except that they have Admiral-ty taper nose threads instead of standard threads. Pistol No. 19 Mk I is being reintrodu-ced into service use to be employed in the nose of the G.P. 250-lb. bombs Mks, I, II, and III, which were recalled to service status.

Figure 123 - Nose Pistol No. 19 Mk I

Figure 124 – Safety-clip arrangement of Nose Pistol No. 19 Mk I