40 lb. G.P. Bomb (Stabilized)250 lb. G.P Bomb Mks I, II & III
U.S.N.B.D. - BRITISH BOMBS AND FUZES; PYROTECHNICS; DETONATORS
GENERAL PURPOSE BOMBS

 

 

 

 

 

BRITISH BOMB

FUZING

Nose Pistol No. 33 Mk I.

40 LB. G.P.

COLOR & MARKINGS

Dark green overall; ½ red

 

band 1" from nose; 1" light

 

green band 5½" from nose.

TAIL NO.

 

(Parachute)

OVERALL LENGTH

27.25"

 

BODY LENGTH

15.90"

Mks I, II, III

MAX. BODY DIAMETER

Mk. I: 5.01"

 

 

II & III: 5.05"

(Service)

WALL THICKNESS

0.47"

 

TAIL LENGTH

11.4"  

TAIL WIDTH

4.88"  

TOTAL WEIGHT

38.5 lb.  

CHARGE/WEIGHT RATIO

17%

 

BODY CONSTRUCTION:

Cast steel body, nose end fitted with an exploder container which is screwed and cemented in position and locked by a locking screw. Exploder container is threaded to take the pistol. Rear end of bomb body is closed; reduced in diameter to form a spigot with a central boss, which is drilled and tapped to receive an eyebolt to secure the parachute tail unit to the body.

TAIL CONSTRUCTION:

Parachute tail unit consists of a cylindrical strut attached to the rear end of a tail tube by four fins. The parachute is packed in a fabric cylinder which is closed at its rear end and fits inside the tail tube. The rear end of the fabric cylinder is connected by pilot lanyards to a flanged cover which fits loosely in the cylindrical strut and is re-tained in position, closing the rear end of the tube, by a wire transit clip.

SUSPENSION:

Mk I:

Normally carried 6 in the 250 lb. Small Bomb Container, through limited number have single suspension lug.

Mk II:

Normally carried 6 in the 250 lb. Small Bomb Container; may be suspended from a band around body.

Mk III:

Single lug welded to body for use when carried on Light Series bomb carrier. Can be loaded 6 into 250 lb. Small Bomb Container.

EXPLOSIVE COMPONENTS:

Detonator: (See Appendix I, page 309)
Exploder: T.N.T. and C.E. retained by a waxed felt washer.
Filling: Mk I - 6.3 lb. Amatol (80/20).
    Mk II - 6.5 lb. T.N.T.
   

Mk III - 6.5 lb. Amatol (60/40).

REMARKS:

Usually used as fragmentation bomb, and is identical with the 20 lb. parachute frag-mentation bomb except for size.

40 lb. G.P. Bomb (Stabilized)250 lb. G.P Bomb Mks I, II & III