ALLIED BOMBS AND FUZES

SIZE:

20 lb. Mark I, II, III

TYPE:

Anti-personnel (Fragmentation)

(Stabilized)

20 lb. Mark I, II, III

(Parachute-equipped)

TARGET:

Personnel, motor con-voys, airplanes on the ground etc. Used against ground targets by air-plaines flying at low alti-tudes.

FUZES (Nose):

D.A. No. 16 Mark I
(20 lb. Mark I only)
D.A. No. 29 Mark I

DATA

20 lb. (Stabilized)

20 lb. (Parachute)

1

OVERALL LENGTH

21.35 inches

2

LENGTH OF BODY

12.8 inches

12.8 inches

3

DIAMETER OF BODY

Mk. I – 5.1 inches
Mk. II & III – 3.95 inches

3.95 inches

4

THICKNESS OF WALL

0.4 inch

0.4 inch

5

MATERIAL OF WALL

Steel

Steel

6

CONSTRUCTION OF BODY

The body consists of a cast or forged steel case, streamli-ned in shape, threaded at the nose to take the fuze adapter and fitted with a base plug shaped to receive the tail as-sembly.

7

TYPE OF SUSPENSION

These bombs are susbended horizontally.

8

CONSTRUCTION OF SUSPENSION LUG

The Mark I and II bombs are equipped with eyebolts which consist of U-shaped bare rivetted to the case. The Mark II bombs do not have eyebolts but all of the 20 lb. bombs are designed to be carried in standard small bomb containers.

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 filler is T.N.T., "Totryl" is stencilled in three places on the green band or if Amatol is used, the fraction 80/20 ap-pears in three places on the green band.

10

LENGTH OF TAIL

Mk. I – 10.5 inches
Mk. II & III – 9.0 inches

Parachute case

11

WIDTH OF TAIL

Mk. I – 6.5 inches
Mk. II & III – 3.8 inches

12

MATERIAL OF TAIL

Mk. I – Wood & Mild steel
Mk. II & III – Mild steel

Parachute case - Steel.
Parachute - White silk.

13

CONSTRUCTIN OF TAIL

The tail of the Mark I bomb consists of a wooden cone secured to the base plug by a single bolt with four mild steel vanes attached to cone. Mark II & III bombs differ in that the cone is of steel.

A cylindrical steel parachute case to which four narrow vanes are welded is secured to the bomb body by a bolt. A circular ring welded to the vanes directs the wind a-gainst a closing cap which is held in place by transit clip.

14

WEIGHT OF TAIL

15

TYPE OF FILLING

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

WEIGHT OF FILLING

1) 5 lbs. 4 oz.
2) 4 lbs. 2 oz.

TOTAL WEIGHT OF BOMB

1) 22 lbs. 12 oz.
2) 21 lbs. 10 oz.

CHARGE/WEIGHT RATIO