ALLIED BOMBS AND FUZES

SIZE:

4 lb. Mark I

TYPE:

Incendiary Bomb

TARGET:

Frame or non-fireproof construction

FUZES (Nose):

Simple impact fuze contained in rear of body

DATA

4 lb. Mark I

1

OVERALL LENGTH

21.5 inches

2

LENGTH OF BODY

3

DIAMETER OF BODY

1.67 inches

4

THICKNESS OF WALL

approx. 0.5 inches

5

MATERIAL OF WALL

Chromated magnesium body with steel nose.

6

CONSTRUCTION OF BODY

The body is constructed very similar to the American 4 lb. AN-M 50A1. The magnesium case is a hexagonal casting in which a blunt steel nose is secured. The rear of the magne-sium casting is threaded to receive the simple, impact fuze.

7

TYPE OF SUSPENSION

These bombs are carried in a case containing 20 bombs. Three of these cases can be loaded into a 250 lb. small bomb container which therefore carries 60 bombs.

8

CONSTRUCTION OF SUSPENSION LUG

There is no provision for individual suspension.

9

COLOR & MARKINGS ON BOMB AND TAIL

The body of the bomb is painted a dull red for a distance of 3.5 inches from the nose. In the center of dull red portion is painted a 1.5 inch black band and centrally over this is a ½ inch bright red band. Manufacturer's or filler's markings may be stencilled on bomb body.

10

LENGTH OF TAIL

11

WIDTH OF TAIL

1.67 inches

12

MATERIAL OF TAIL

Tinned plate.

13

CONSTRUCTION OF TAIL

The tail assembly consists of a hexagonal tinned plate pressing with a male-type closing cap at the rear. The tail is secured to the fuze body by drive screws and has a side opening for the safety plunger.

14

LENGTH OF TAIL

15

TYPE OF FILLING

The filling is an incendiary composition which melts the magnesium case. The case burns for about 10 minutes.

16

WEIGHT OF FILLING

6.75 oz.

17

WEIGHT OF CASE

Magnesium 1 lb. 9.5 oz.
Steel 1 lb. 8.0 oz.

18

TOTAL WEIGHT OF BOMB

3 lbs. 13.5 oz.

19

CHARGE/WEIGHT RATIO

26.4%