This is a hollow charge anti-tabk hand grenade stabilized in flight by four fabric fins. The fins are held close to the handle, but open out immediately the grenade thrown. The overall length of the grenade is 20.9 inches and its maximum diameter 4.2 inches. The complete grenade weighs 3 lb. 1 1/4 oz. The grenade body is painted buff colour and stencilled "PWM 1 (L)" in black; the handle is unpainted. The top of the fuze cover is stamped: "Kappe nicht zum Tragen benutzen (Do not carry by cap)" and painted red.

Grenade body filled cyclonite/Wax 50/50.

Wood handle filled PETN/Wax 90/10.

Four fabric fins.

Fuze.

Gaine.

The grenade body is a thin steel cone tapering to a tubular opening 1.18 inches in dia-meter to receive the end of a wooden handle, whilst the other end is closed by a thin hemispherical outer casing forming the head. The cone and head are secured together by turning the cone opening over a flange in the hemispherical head. The head is strengthe-ned by an inner liner in the form of a thin hemispherical segment cut so that only the outer casing cover the impact area of the hand.

The cone portion of the body contains the main bursting charge consisting approximately 18.5 ozs. of cast cyclonite wax 50/50, and a thin flanged cavity liner. The liner is of pressed steel 0.069 inches thick shaped to form a 30 degree cone 2.4 inches in length, with a base of 1.57 inches which opens into a hemispherical recess 2.8 inches in diame-ter. The detonative impulse from the fuze is transmit-ted to the bursting charge through an explosive filling carried in the wooden handle.

The tubular handle is made from beech wood and is approximately 11.75 inches in length; it contains six pellets of PETN/Wax 90/10, each weighing approximately 7 drams. The end pellets are secured by nitrocellulose varnish and are in contact with the bursting charge and gaine respectively. The forward end of the handle is enclosed in a metal collar which fits into the tubular opening at the base of the grenade body; it is secured by two screws. The rear end of the handle is increased in diameter both internally and externally to form a cavity to accommodate a gaine, and is encased in a metal tube forming part of the fuze holder.

Four steel spring ribs are secured rquidistant around the handle, and each carries a trian-gular stabilizing fin made from textile material. The ends of the ribs are housed in grooves in the forward end of the handle and are secured by the metal collar.

The fins are made of either white or red dyed twill woven viscose ravon and are tacked along the handle opposite its rib. The long edge of the material is turned over the rib and stitched with cotton. A semicurcular metal collar fitted with a pin, is attached by a length of string to the free end of one rib. The collar secures the tape of the fuze safety pin and prevents the latter falling out before the grenade is thrown.

The fuze holder consists of a tube with two thin sheet metal cones attached to one end. One is inserted in the tube apex first, and the other closes the end of the tube. The fuze is held longitudinally between the apexes of the cones. Both cones are perforated at their apexes, one to form a flash hole between the fuze detonator and the gaine, an the other for the insertion of the fuze safety pin. A metal tongue attached to the side of the tube secures a safety cover.

The metal safety cover protects the fuze assembly and retains the spring ribs and fins closes to the handle during transport. The cover consists of an inner cap inside a larger cap, the former fits closely over the top cone of the fuze holder, and the latter covers the end of the ribs. The inner cap appears to be spot welded to the larger cap. The cover is held by the metal tongue, attached to the fuze holder, which passes through a slit in the top of the cover and is bent over to secure it.

The fuze consists mainly of a body, detonator holder, detonator, striker, safety pin, 2 balls, spring, needle.

The body is a steel tube 0.6 inch long, and accommodates the striker; it is screwthrea-ded externally at the forward end for the attachment of a cup shaped non-ferrous deto-nator holder. The base of the holder is perforated to form a flash hole.

The igiferous detonator is a thin cup-shaped aluminium body 0.24 inch in diameter and 0.12 inch high with a flash hole in the base closed by a thin aluminium disc. It is filled with two compositions, approximately equal in weight and volume. That in the base is a yellow green composition consisting of lead styphnate and barium nitrate 84 per cent, calcium silicide 12 per cent, and organic matter 4 per cent; above this is a purple brown composition consisting of lead peroxide 50 per cent and calcium silicide 50 per cent. The detonator is closed by a tinfoil disc laquered green, and is inserted upside down in the holder. Above the detonator are three steel washers under a paper washer.

The cylinder striker is a sliding fit in the fuze body and is provided with a mushroom head and coned end to hold the needle; it is bored centrally to receive the safety pin with a length of tape attached and, near the head, radially to accommodate partially two steel safety balls.

The safety pin thrust the balls outward to foul the fuze body and prevent the forward movement of the striker thereby holding the needle off the detonator. During transport the tape is secured under a metal collar attached by string to one of the spring ribs. When the grenade is thrown, the drag of the tape with-draws the safety pin.

The weak helical spring surrounds the fuze body and is held in compression between a step on the underside of the striker head and the detonator holder.

The short steel needle is provided with a sharp pyramidal point and small shank, it is held in the striker by burring the coned end of the striker around its small shank.

The small PETN gaine (kl.Zdlg. 34 Np) is used. This was described in Pamphlet No. 11.

It is estimated that the grenade will penetrate 80 mm, of homogeneous plate (I.T. 80) at normal.

The safety cover is removed and immediately the bomb is thrown the fins open out and the metal collar releases the tape of the fuze safety pin. The drag on the tape with-draws the safety pin thereby releasing the two steel balls. The needle is held off the de-tonator by the striker spring. On impact, the striker compresses the spring and impinges the needle on the detonator. The flash from the detonator detonates the gaine which in turn detonates the filling in the handle and the grenade.

Fig. 20