Main charge: Picric.

Booster: P.E.T.N.

Propellant: Black powder and nitrocellulose.

Color: The projectile is painted black over-all with a red nose tip and a yellow band around the rear of the nose section.

Fuzing: Type 98 Interior Fuze.

Weapons in which used: Special spigot-type projector.

Description: The projectile, which resembles a bomb, is made in three parts. The nose section, ogival shape, is externally threaded at its base to screw into the center section and is internally threaded to receive a steel base plate. It has a booster cup fitted with a fuze adapter screwed into the nose.

The center section is a short cylinder, solid on the base and threaded externally to screw into the tail section. It is closed at the forward end, with a steel plate having a fuze-adapter ring, fitted with a booster cup, welded in its center.

The tail section screws onto the center section and has a gradual taper toward the rear from a point 14.5 inches below the forward end. It is hollowed out to fit over the projec-tor tube. Four sheet-steel tail fins, each braced by two stabilizing wires, are welded to the tail section.

For convenience in handling and assembling, steel bands, each fitted with two double handles, are provided. Before the firing of the projectile, the carrying bands are removed.

The propellant charge is placed in a brass pot which fits into the recessed portion of the projector tube. The charge is contained in a cardboard container having a brass flash tube passing through its vertical axis, through the brass pot, and being screwed into the spigot. There is a drilled and tapped hole near the forward end of the tail section of the projectile into which the igniter tube screws. When in position, the end of the igniter tube in in close proximity to the end of the brass flash tube which leads into the propel-lant charge.

Figure 314 – 32-cm Spigot type Mortar.