|
B. 250.lb. Mk IV {Service) |
|---|
 |
Filler and Weight | ||
|---|---|---|---|
| Torpex, TNT, | |||
| Body and Overall Weight | |||
| NA, 50 lb. | |||
| Color | |||
| Dark green, Red Band, Light green band | |||
| Type of Round, DODIC | |||
| B.,Mk IV, NA |
| Description: |
|---|
| The bomb consists of a trun¬cated, cone-shaped charge case with a concave rose welded on, a buoyancy chamber secured to the charge ease by twelve nuts, and a clip-on tail. A convex nose attachment can be fitted to the nose by means of three brackets, equi-spaced around the edge of the nose. The buoy¬ancy chamber has twelve band clearance pock¬ets around the forward end to permit access to the-twelve bolts securing the charge case. In¬ternal reinforcements are spot welded to the interior forward half of the buoyancy chamber, and two circular stiffeners extend athwart-ships through the chamber, spot welded to the chamber wall. An exploder tube extends cen¬trally through the buoyancy chamber and charge case. It is welded at the rear to the joint ring fitting inside the fuze pocket, and supported by the stiffening ring in the middle of the buoy¬ancy chamber. |
| Use: |
|---|
| Only the 250-lb. buoyancy bomb has been used by the British. The bomb is designed to be dropped in front of ships under way, and to rifle and detonate on contact with the ship's bottom. The bomb consists primarily of an explosive charge, a buoyancy chamber, and a clip-on tail, It is fazed with y Tail Fuze No, 850. The bomb is painted dark gray over-all, and has a red nose band and a green band at the base of the ogive. |
| Functioning: |
|---|
| The Tail No. 23 Mk I, used on the Mk III body, consists of a tail cone with cylindrical strut secured by four fins riveted to the strut and tack welded to the tail cone. The tail assembly is attached to the body by spring clips, and breaks free on water impact, On striking the water, the nose attachment is dished in and the tail breaks away. When the tail breaks away, it uncovers a wheel-shaped disc on the base of the bomb. This is the contact disc, to which are attached three chains, the opposite ends being fastened to the support ring on the bomb base. If these chains are tight, the fuse is armed as the contact disc rises during the arming process. If the bomb fails to hit a ship upon rising, it sinks after a short flotation period, |
| Munition Components: |
|---|
|
| Data Source: |
|---|
| OP_1665ExplosiveOrdnanceBritish1946 |
| Munitions Tech Data Sheet: |
|---|
