ALLIED BOMBS AND FUZES

SIZE:

50 lb. Mark I

TYPE:

G.P.-H.E.

120 lb. Mark I

TARGET:

General Bombardement

FUZES

NOSE: D.A. No. 19 Mk. I or II

TAIL: No. 21 Mk. I or II

DATA

50 lb. Mark I

120 lb. Mark I

1

OVERALL LENGTH

30.7 inches

42.3 inches

2

LENGTH OF BODY

15.0 inches

21.5 inches

3

DIAMETER OF BODY

5.9 inches

8.1 inches

4

THICKNESS OF WALL

0.38 inches

0.5 inches

5

MATERIAL OF WALL

Steel

Steel

6

CONSTRUCTION OF BODY

The bomb consists of the following: A streamlined steel casting of forging, threaded at the nose to take the nose adapter which holds the central exploder tube and at the other end of the casting is a threaded base plug through which the exploder tube passes; welded to the end of the casting is a streamlined section of thin metal, containing no explosive, but which is tapered to take the tail ring. The exploder passes through this section also.

7

TYPE OF SUSPENSION

These bombs are suspended horizontally.

8

CONSTRUCTION OF SUSPENSION LUG

The 50 lb. bomb has two U-shaped eyebolt attached to bomb case with screws. The eyebolts are 180 degrees re-moved and at right angles to each other. The 120 lb. bomb has only one eyebolt attached by cap screws.

9

COLOR & MARKINGS ON BOMB AND TAIL

The bomb case and tail assembly are painted yellow; the bomb case having a green band around the largest diameter and a red band around the nose. If the filling is T.N.T., "Trotyl" is stencellid in three places on the green band or if Amatol is used, the fraction 80/20 appears in three places on the green band.

10

LENGTH OF TAIL

15.7 inches

11

WIDTH OF TAIL

5.9 inches

8.0 inches

12

MATERIAL OF TAIL

Mild steel.

Mild steel.

13

CONSTRUCTION OF TAIL

The tail is constructed of the following parts:
A truncated cone which appears to be casting, fits over rear section of bomb body and held to it by a lock nut over the exploder tube; three mild steel vanes are fastened to the cone and are reinforced by a cylinder rivetted to the vanes.

14

WEIGHT OF TAIL

15

TYPE OF FILLING

Two types of filling may be used: 1) Trotyl (T.N.T.) or 2) 80/20 Amatol. The figures given below are for Mark I bombs only.

16

WEIGHT OF FILLING

1) 9.3 lbs.
2) 11.8 lbs.

1) 25.0 lbs.
2) 32.0 lbs.

17

TOTAL WEIGHT OF BOMB

1) 45.3 lbs.
2) 47.8 lbs.

1) 113.0 lbs.
2) 120.0 lbs.

18

CHARGE/WEIGHT RATIO

1) 20.4%
2) 24.3%

1) 22.1%
2) 26.6%