8.5 lb. Practice Bomb Mks I, II & III11.5 lb. Practice Bomb Mk I & II
U.S.N.B.D. - BRITISH BOMBS AND FUZES; PYROTECHNICS; DETONATORS
PRACTICE BOMBS

 

 

 

 

 

BRITISH BOMB

FUZING

Simple striker arrangement

10 LB. PRACTICE

 

with detonator-burster

 

No. 28 Mk I.

COLOR & MARKINGS

White overall. 2 light green

 

bands ½ wide around tail

Mk I - Smoke

 

cone.

Mk III - Flash

OVERALL LENGTH

18 in.

 

MAX. BODY DIAMETER

3 in.

(Service)

WALL THICKNESS

Solid body

 

TOTAL WEIGHT

10 lbs.

 

 

 

 

 

   

BODY CONSTRUCTION:

Solid cast iron nose with an axial bore housing striker head and rod, with a guide bush threaded into rear cavity, and internal rear threads to take central plug. Striker retained by cotter pin (removed when loaded on aircraft), safety pin, and shear wire through rod and guide bush. Central plug houses central burster tube.

TAIL CONSTRUCTION:

Tail cone closed at rear by conical tail plug and at front end by the central plug to which it is attached. Central tube extends through the tail cone to the tail plug and holds the detonator-burster. A tapped hole, fitted with a plugm is provided in the cen-tral plug for filling. Taul tube, with four fins carrying cylindrical strut, projects from tail plug, its rear end closed by a cap.

SUSPENSION:

Single eyebolt which screws into bomb body opposite cavity, for suspension from Light Series bomb carrier.

EXPLOSIVE COMPONENTS:

Detonator burster:

10 grains fulminate of mercury and 7 C.E. pellets.

  Smoke Filling, Mk I:

1 lb. Titanium Tetrachloride, which forms white cloud on exposure to at-mosphere upon detonation of tail cone.

 

Smoke Filling, Mk III:

1 lb. mixture of gunpowder and mag-nesium turnings, which causes brill-iant white flash on detonation.

REMARKS:

(1) Smoke filling used for daytime practice operations. Flash filling used at night. These bombs, because of solid iron nose, should not be used against lightly armored targets.

(2) Mk II had a plastic tail, but was not satisfactory so all were scrapped.

8.5 lb. Practice Bomb Mks I, II & III11.5 lb. Practice Bomb Mk I & II