(Fig. 19)

This shell is fired from the 10.5 cm l.F.H. 18 gun-howitzer. The filled and fuzed shell weighs 33 lb. 1 oz.

The streamlined shell is an annealed steel casting, machined externally overall. The cavi-ty surface is unmachined except for provision of an internal thread at the nose to recei-ve the exploder container and fuze.

The exploder container, which is 2.9 inches deep, consists of a drawn steel cup pressed into a threaded collar.

The single driving band is of the bimetallic type, no base plate is fitted. The empty shell and exploder container weigh 28 lb.

The shell is direct filled with 3.8 lb. cast 40/60 Amatol. The central exploder cavity is 6.5 inches deep, 1 inch diameter and carries below the exploder container an 85 gram card-board smoke box. This is unnumbered and contains 2 oz. 10 drs. smoke mixture of the following components:–

Red phosphorus

Paraffin wax

Magnesium phosphates

The A.Z. 23 fuze used with this shell was described in Pamphlet No. 1, page 7.

Fig. 19