Description
The vane and vane assembly of the Fuze No. 849 Mk II consist of a vane cap, which is held by three retaining clips, the vanes, and the arming spindle. A steel ring is soldered to the retaining clips to prevent damage to the vanes, which are of sheet steel and are staked to the arming spindle. The spindle threads into the arming vane support and down onto the ball retaining cap, which holds four retaining balls in the groove in the top of the spring loaded striker. A safety pin passes through the arming vane support and the striker. Below the striker is a percussion cap which flashes down to the primary powder pellet. At right angles to the flash channel below the cap, is a vent hole and vent hole pellet. This vent hole leads to the outside, but is sealed by the outer cover in the unfired condition. At the outer end of the primary pellet chamber is a short powder pellet, which flashes through a flash channel in the fuze drum to the length of Bickford type safety fuse contained in a lead foil sheath surrounding the fuze drum. A short fire hole leads from the safety fuse to the long powder pellets which lead to the magazine. The magazine is housed in the lower fuze body. On the outer side of the fuze is a scale graduated from 0 to 95 seconds, with an indicator which moves around it to set the fuze. A red sealing strip joins the outer cover and fuze body.
The No. 849 Mk III time-setting disc is calibrated from 0 to 70 seconds and includes a safe setting.
Functioning
No information about functioning.
See Also
Nothing else to see.
Source(s)
OP 1665, British Explosive Ordnance (1946)
