15-cm (150-mm) Armor-Piercing High-Explosive Projectile30-cm (305-mm) Armor-Piercing High-Explosive Projectile
Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition
Chapter 4 – Section 1
ARMY PROJECTILES
Type 13 Year Smoke (W.P.) Projectile
Weight of projectile, filled (without fuze): 33.63 kg. (74.25 pounds).
Bursting charge (cast picric acid): 1 kg. (2.2 pounds).
Chemical agent: 3.62 kg. (8 pounds).

W.P. is contained in a brass cylinder fitted below the bursting charge. To prevent move-ment within the projectile, the container is surrounded by wax.

Diameter at bourrelet: 149.2 mm (5 7/8 inches).
Length over all (without fuze): 487.4 mm (19 7/16 inches).
Length protruding from case (without fuze): 471.5 mm (18 9/16 inches).
Width of rotating band: 15.0 mm (19/32 inch).
Fuzing: Type 88 instantaneous nose fuze (howitzer, mortar).
Weapons in which used:

4th-year type howitzer: Case A, 10 3/16 inches; case B, 8 7/8 inches.

Type 96 howitzer: Case 12 5/8 inches.

Type 38 howitzer: Case 4 1/4 inches.

Figure 292 – Type 13-Year Smoke (W.P.) Projectile.

15-cm (150-mm) Armor-Piercing High-Explosive Projectile30-cm (305-mm) Armor-Piercing High-Explosive Projectile