Type 3 250-kg. "Skipping Model" bomb.

Type 3 500-kg. "Skipping Model" bomb.

Material of construction: Brass except for steel arming vanes tightening pins and firing pin.

Position and method of fixing in bomb: Screwed into nose of bomb and tightened by a wrench that fits over the protruding pins.

Components of Explosive Train: Primer, delay gaine, and booster. Relay incorporated in gaine.

Fuzes likely to be found with: B-8 (a).

Delay times: 2 seconds.

Threads: 8 thread per inch, RH, diameter 1 5/8 inches.

Description: The upper fuze body houses a striker spindle that has a firing pin at its lo-wer end and a threaded segment at the upper end that protrudes above the body. The vane assembly consisting of four black vanes attached to a brass hub screws onto this threaded portion. Just below this threaded portion, a part of the spindle is enlarged. A rubber gasket fits down over this shoulder and a threaded washer screws down in a hole in the top of the fuze body and bears on the gasket. The spindle is drilled to receive a brass shear wire 2.5 milimeters in diameter.

The lower fuze body houses a threaded plug containing the primer and below that a threaded delay carrier. The delay train runs across the diameter of the carrier and relays on the top and bottom of the carrier serve to lead the flash away from and back to the center line of the fuze. The gaine abuts against the delay carrier. The booster housed in a brass cylinder threads onto the lower fuze body.

Operation: The safety fork is withdrawn allowing the vanes to rotate up the threaded spindle and fall clear. On impact with a solid target the shear wire is sheared and the firing pin is driven into the primer. The flash ignites the delay train which in turn fires the gaine.

Figure 101 – A-8 (b) Bomb Fuze.