10.5 cm l.F.H. 18 (gun howitzer).

s. 10 cm K. 18 (10.5 cm medium gun). The shell is fired with the highest propellant charge in this gun.

The shell is painted black and marked with a red band above the driving band, which as of the copper and iron type. The weight of the shell, filled and fuzed is 34 lb. 10 oz.

The construction of the shell with its ballistic and penetrative caps is the same as that of the 7.5 cm described and illustrated (Fig. 15) in Pamphlet No. 4. The pad of inert com-position in the front end of the cavity for the bursting charge is also included.

The bursting charge is contained in an aluminium container shaped to fit the wall of the shell cavity. The exterior of the container is marked "Sprldg 10 cm Pzgr. rot". The charge of ethylene-diamine-dinitrate is made up in three pressed pellets. These takes the form of a solid pellet in the forward part of the container, followed by an annular pellet con-taining the exploder, and hastly a ring pellet inserted in the annular pellet behind the ex-ploder. The blue exploder pellet of Cyclonite/Wax weighs 633 grains and is cylindrical with a cavity at the base to receive the head of the fuze. The total weight of the filling is ap-proximately 8 oz. 6 dr.

The base fuze with tracer is the same as that used in the 7.5 cm shell (see Pamphlet No. 4, Fig. 16) accept that the body is of bigger dimensions to suit the larger shell, and is accordinaly stamped Bd.Z. f. 10 cm Pzgr. (i.e. base fuze for 10 cm A.P.) The maximum diameter of the fuze body is 3.5 inches and its length 2.56 inches.

The tracer fitment which screws into the base of the fuze is described in the section on German tracers in this pamphlet.