FUZING

COLOR & MARKINGS

TAIL NO.

OVERALL LENGTH

BODY LENGTH

MAX. BODY DIAMETER

WALL THICKNESS

TAIL LENGTH

TAIL WIDTH

TOTAL WEIGHT

CHARGE/WEIGHT RATIO

66%

BODY CONSTRUCTION:

Welded cylindrical case closed at each end by a cover welded on. Central primar tube is welded in an opening in the rear cover and extends approximately half way through the body. Equispaced the rear cover are three lugs, each drilled and tapped to receive a stud used for securing the tail to the depth charge. The filling holes, each closed by a bung, in the rear cover. The front cover is dished inward to prevent rico-chet.

TAIL CONSTRUCTION:

Mk III: Cylindrical drum open at both ends. Strengthening ring is welded to the front end and provided with 3 equispaced brackets, weakly riveted on, which fit over the studs in the corresponding lugs on the rear end cover of the body. Tail strengthened by six circumferential corrugations. Tail breaks off on impact with water. Front of tail has one large port for fuze-setting control link and two small ports to give access to pistol and valve unit when fitting the fuze-setting control link.

Mk IV: Designed with arming vanes and reach rod to arm pistols Mks XIX and XX, which are of the air arming type and are replac-ing the Mks XIV and XVI tail hydrostatic pistols. This tail is constructed with a three segment cone, to which are revited three fins supporting the three segment cylindrical strut. Three hand clearance holes are equispaced around the forward end of the cone.

SUSPENSION:

Mk XI:

Single lug welded to case at center of gravity for Bri-tish aircraft.

Mk XI*:

Dual lugs welded to case for suspension from U.S. air-craft.

EXPLOSIVE COMPONENTS:

Detonators:

Mk VII detonator of A.S.A. and C.E.

Primer:

Mk VIII primer, 1 perforated and 1 solid C.E. pellet.

Filling:

175 lbs. Torpex.

REMARKS:

The Mk XIX and XX hydrostactic pistols are armed by vanes on a reach rod extend-ing through the tail unit, consequently requiring the Mk IV tail, which is considerably different than the Mk III.