Type 4 Super Detonating FuzeType 88 Small Instantaneous Fuze
Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition
Chapter 4 – Section 4
ARMY PROJECTILE FUZES
Ho 301 - Impact Fuze
Use: 40-mm projectiles for the Ho 301 aircraft cannon.
Description:

Over-all length (with gaine): 1 5/8 inches.

Over-all length (without gaine): 1 1/8 inches.

Maximum diameter: 1 1/2 inches.

Threaded length: 1/4 inch.

Number of threads: 6.

Construction: The fuze body is made of one piece. The striker is supported by a centri-fugal detent which is held under a shoulder of the striker by two locking centrifugal de-tents. The gaine threads into the bottom of the fuze.

Operation: Centrifugal force causes the locking detents to more out, thus freeing the striker detent which moves out arming the fuze. On impact the striker is driven into the primer.

Figure 320 – HO 301 Impact Fuze.

Type 4 Super Detonating FuzeType 88 Small Instantaneous Fuze