ALLIED BOMBS AND FUZES

SIZE:

R.A.F. 500 lb. Mark I

TYPE:

G.P.-H.E. (Light Case)

R.L. 520 lb. Mark I

TARGET:

General Bombardement

FUZES:

R.A.F. (Nose):
D.A. No. 8 Mk. I
D.A. No. 19 Mk. I or II

R.L. (Nose):
D.A. No. 19 Mk. I or II
D.A. No. 20 Mk. I, II or III

Both (Tail):
No. 5B Mk. I or II

DATA

R.A.F. 500 lb. Mk. I

R.L. 520 lb. Mk. I

1

OVERALL LENGTH

61.1 inches

60.7 inches

2

LENGHT OF BODY

55.0 inches

54.0 inches

3

DIAMETER OF BODY

19.0 inches

19.6 inches

4

THICKNESS OF WALL

0.15 inches

0.25 inches

5

MATERIAL OF WALL

Mild steel

Mild steel

6

CONSTRUCTION OF BODY

The bomb cases of these types are very similar consisting of: 1) A hemi-spherical nose section which in the R.L. Mark I has a cast steel nose-reinforcing piece attached by screws welded to a 2) Conical body section which in the R.L. Mark I has welded reinforcing around the nose-to-body weld and on each side of the suspension eyebolt. There is a central exploder tube held in place by the nose (or nose-piece) and tail adapters.

7

TYPE OF SUSPENSION

These bombs are suspended horizontally.

8

CONSTRUCTION OF SUSPENSION LUG

A U-shaped suspension eyebolt is attached to the body near the center of gravity by rivets (R.A.F.) or bolts (R.L.) and also to a band which is welded to the bomb body.

9

CLOR & 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 T.N.T., "Totryl" 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

19.0 inches

18.5 inches

11

WIDTH OF TAIL

19.0 inches

19.6 inches

12

MATERIAL OF TAIL

Mild steel

Mild steel

13

CONSTRUCTION OF TAIL

The tail assemblies of these are very similar diffe- ring only in profile of tail cylinder and in the met- hod of attaching to bomb case. The tail consists of four vanes attached to a clamping band (R.A.F. Mk.) or rivetted to the tail adapter; a cylindrical around the vanes, the cylinder having cut-out sections; and stiffening rings at top and bottom of cylinder.

14

WEIGHT OF TAIL

15

TYPE OF FILLING

Two types of fillings may be used in these bombs:
1) Amatol 80/20 filling or; 2) T.N.T. filling.

16

WEIGHT OF FILLING

1) 280.0 lbs.
2) 356.0 lbs.

1) 273.0 lbs.
2) 354.0 lbs.

17

TOTAL WEIGHT OF BOMB

1) 460.0 lbs.
2) 536.0 lbs.

1) 453.0 lbs.
2) 534.0 lbs.

18

CHARGE/WEIGHT RATIO

1) 61%
2) 66.5%

1) 60.0%
2) 66.5%