Type 89 50-mm Incendiary Mortar50-mm Stick Charges
Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition
Chapter 4 – Section 3
ARMY MORTARS
50-mm Finned Bangalore Torpedo
Weight complete round: 17.89 pounds.
Weight man charge: 6.34 pounds.
Main charge: Picric.
Over-all length (without fuze): 78.37 inches.
Base, section length: 33.25 inches.
Length from after end of base to forward bearing surface of base section: 12.75 inches.
Maximum diameter of explosion tube: 1.97 inches (50 mm).
Fins:

Length: 14.75 inches.

Maximum width: 3.5 inches.

Minimum width: 2.5 inches.

Color: Fins and bangalore section are painted tan with a red band at the top of each section. The modified protion of the base section is painted black.

Fuzing: Instantaneous delay fuze for bangalore mortar.

Weapon in which used: Type 89 discharger.

Description: The projectile is constructed in two sections. The nose section is a stan-dard bangalore length, while the base section is a bangalore length cut off and modified to fit into the barrel of the discharger. This section also has three spot-welded brackets to which the sheet metal fins are bolted. A cap, having two circumferential grooves cut into it to divide the surface into three after bearing surfaces, is welded around the after end of the base section. A length of 50-mm tubing is welded to the base section and serves as a forward bearing surface for the projectile. A plate is welded to the bangalore base section to prevent the bangalore from sliding too far down into the launcher tube.

Figure 299 – 50-mm Finned Bangalore Torpedo.

Type 89 50-mm Incendiary Mortar50-mm Stick Charges