TM 9-1985-5; 50-mm Stick Charges

Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition

Chapter 4 – Section 3

ARMY MORTARS

50-mm Stick Charges

	Small	Large
Weight complete round	15.62 pounds	17 pounds.
Weight main charge	7.0 pounds	10 pounds.
Explosive components:
Main charge	Picric	Picirc.
Propellant	Black powder	Black powder.
Over-all length	27.35 inches	25.5 inches.
Length explosive container	6.75 inches	4.5 inches.
Width of explosive container	4.5 inches	6.25 inches.
Height explosive container	4.5 inches	6.25 inches.
Wall thickness	0.05 inch	0.25 inch.
Diameter of stick	1.97 inches (50 mm)	1.97 inches (50 mm).

Color: The metal explosive container is painted black, while the wooden "stick" is left un-painted. The large model has a white stripe for and aft around the explosive box.

Weapon in which used: Type 89 discharger.

Fuzing: Two pull igniters.

Description: The projectile consists of a cast-iron box containing blocks of picric acid mounted on a wooden pole 50 mm in diameter. Two pull igniters are inserted in the burst-ing charge and are tied to metal loops on each side of the launcher tube collar. When the projectile is fired these pull igniters are initiated and will in turn set off the bursting charge after a short delay. The black powder propellant in silk bags is placed in the laun-cher tube below and independently of the projectile. The propellant is fired by a pull igni-ter inserted in the ignition aperture in the side of the launcher tube.

Figure 300 – 50-mm Stick Charges.