Type 1 Armor-Piercing ProjectileType 90 5.7-cm (57-mm) Substitute Projectile
Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition
Chapter 4 – Section 1
ARMY PROJECTILES
Type 90 - 5.7 cm (57-mm) High-Explosive Projectile
Weight of complete round: 2.91 kg. (6.40 pounds).
Weight of projectile, filled (fuzed): 2.36 kg. (5.18 pounds).
Weight of filling: 0.25 kg.
Filling: TNT.
Diameter of bourrelet: 57 mm (minus tol.).
Length of projectile (without fuze): 181 mm (7 1/8 inches).
Lenght of propellant case: 121 mm (4 3/4 inches).
Lenght of assembled round (without fuze and adapter): 280 mm (11 inches).
Width of rotating band: 9.5 mm.
Weapons in which used: Type 90 tank gun, type 97 tank gun.
Fuzing: Type 88 short-delay fuze.
Propellant: Mk 1 square gain (med.), 113 grams.

Figure 232 – Type 90 5.7-cm High-Explosive Projectile.

Type 1 Armor-Piercing ProjectileType 90 5.7-cm (57-mm) Substitute Projectile