ALLIED BOMBS AND FUZES

SIZE:

8½ lb. Mark IV

TYPE:

Practice Smoke of Flash bomb

11½ Mark I

TARGET:

FUZE:

Simple impact fuze which is armed by removal of cotter key but held safe by shear plug.

Data

8½ lb. Mark II

11½ lb. Mark I

1

OVERALL LENGTH

16.0 inches

18.0 inches

2

LENGTH OF BODY

12.0 inches

3

DIAMETER OF BODY

3.0 inches

3.0 inches

4

THICKNESS OF WALL

½ inch

5

MATERIAL OF WALL

Iron and steel

Cast Iron

6

CONSTRUCTION OF BODY

The body of these bombs is constructed in two parts: 1) a cast iron nose section with a stiffening rib at rear of this section and 2) a sheet steel cone welded to a cast iron plate which is threaded to screw into the nose piece. This plate contains the filling plug by which the charge is put into the conical section. Another cast iron plate closes the tail end of the bomb. The only difference in the two sizes of bombs is the filling of the cast section of the bomb with lead and difference in dimensions.

7

TYPE OF SUSPENSION

These bombs are always held horizontally.

8

CONSTRUCTION OF SUSPENSION LUG

Eyebolt is screwed into body of bomb.

9

COLOR & MARKINGS ON BOMB AND TAIL

The bomb is painted white and has two ½ inch green bands ½ inch apart painted around the center of the tail unit.

The bomb is painted white and has two ½ inch black bands ½ inch apart painted around container in the tail and a red ring around the nose.

10

LENGTH OF TAIL

11

WIDTH OF TAIL

3 inches

3 inches

12

MATERIAL OF CAST

Tinned plate and mild steel.

Tinned plate and mild steel.

13

CONSTRUCTION OF TAIL

A cylindrical steel tube to which are attached four vanes. A cylinder is then attached to the four vanes. The entire unit is held to bomb by a small pin.

14

WEIGHT OF TAIL

15

TYPE OF FILLING

Three types of fillings may be used in these bombs: 1) Stannic chloride (smoke), 2) Titanium Tetrachloride (smoke), and 3) Magnesium turnings and gunpowder (flash).

16

WEIGHT OF FILLING

1) 1 lb. 3 oz.
2) 1 lb. 0 oz.

1) 1 lb. 3 oz.
2) 1 lb. 0 oz.

17

TOTAL WEIGHT OF BOMB

1) 8 lb. 7 oz.
2) 8 lb. 4 oz.

1) 11 lb. 8 oz.
2) 11 lb. 5 oz.

18

CHARGE/WEIGHT RATIO