ALLIED BOMBS AND FUZES

SIZE:

250 lb. Mark I

TYPE:

G.P.-H.E.

500 lb. Mark I

TARGET:

General Bombardement

FUZES:

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

TAIL:
No. 22 Mk. I or II

DATA

250 lb. Mark I

500 lb. Mark I

1

OVERALL LENGTH

54.1 inches

68.7 inches

2

LENGTH OF BODY

28.0 inches

35.7 inches

3

DIAMETER OF BODY

10.2 inches

12.9 inches

4

THICKNESS OF WALL

0.6 inches

7/8 inch

5

MATERIAL OF WALL

Steel

Steel

6

CONSTRUCTION OF BODY

The bomb body consists of the following: a stream-lined steel casting or 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, con-taining no explosives, 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

U-shaped eyebolt is attached to body at center of gravity by cap screws.

9

COLOR & MARKINGS OF 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 stencilled 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

11

WIDTH OF TAIL

10.2 inches

12.9 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 a casting, fits over rear section of bomb body and held to it by a lock nut over the exploder tube; four 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.

16

WEIGHT OF FILLING

1) 67 lbs.
2) 54 lbs.

1) 142 lbs.
2) 112 lbs.

17

TOTAL WEIGHT OF BOMB

1) 247 lbs.
2) 234 lbs.

1) 508 lbs.
2) 478 lbs.

18

CHARGE/WEIGHT RATIO

1) 27%
2) 23%

1) 28%
2) 23.6%