British Cluster Projectile, 270 lb, No. 1 Mk 1




The cluster is a cylindrical metal container consisting of a nose unit, recessed to receive the noses of seven 4.5 inch reconnaissance flares, and a fuze adapter, from which radiate six flash tubes to the flare igniters and three flash channels leading to the explosive pellets in the piston housings. The nose unit is secured to the panel locating plate and the tail plate by the T-section suspension bar and the clamping bars. The clamping bars consist of a bar to which are welded two panels. The clamping bars locate the panels and are secured through the panel locating plates to the tail plate and to the nose unit by spring washers and nuts. The nuts securing the clamping bars to the piston housings are further secured by split pins. The tail tie rod is screwed into the tail plate and the tail unit fastened to it by a spring washer and nut.

The flares, from which the suspension lugs and domed caps have been removed, are located by the recesses in the nose unit and panel locating plate. The flares are fuzed with special igniters, consisting of the body and dome portion of the Fuze No. 42 without the percussion cap and striker mechanism, and sealed with primed cambric.

The Tail No. 69 Mk I consists of a sheet-metal tail cone to which a cylindrical strut is attached by four fins. The tail unit is attached to the tail plate of the cluster by a tie rod, which passes down the center axis of the tail wire.

The cluster is suspended by a single lug secured to a T-section suspension bar, which runs from the nose to the base of the cluster.

See Also

Flare, 4.5 inch Reconnaissance, Mk 1, Mk 2, Mk 3, Mk 4, Mk 7

Flare, 4.5 inch Reconnaissance, Mk 5, Mk 6, Mk 8


OP 1665, British Explosive Ordnance (1946)