6-pound Incendiary AN-M69 and AN-M69X

Over-all length, inches

Body length, inches

Body diameter, inches

Wall thickness, inch

Tail length (streamer), inches

Filling

Weight of filling, pounds

Total weight, pounds

Charge/weight ratio

Fuzing

M1

Construction: The bomb body is a hexagonal case with a nose cup welded to the forward end. The nose cup, fuze and powder charges are sealed off from the rest of the case by an impact diaphragm and plug held in a cup-shaped sealing diaphragm. The in-cendiary oil filling is held in a cheesecloth sock situated between the forward sealing dia-phragm and the tail cup.

The tail assembly consists of a tail cup, tail retainer, and disc. The tail cup is secured to the hexagonal case by beading, crimping, and heating. Four gauze streamers, each 54 inches long, are attached to the tail retainer by the tail disc to stabilize the bomb and reduce the terminal velocity.

Suspension

AN-M12

M5

100#

14 AN-M69

AN-M13

M7

500#

60 AN-M69

M19

M23

500#

38 AN-M69

Aimable

E28

E6R2

500#

38 AN-M69

Aimable

M21 (E74)

M23

500#

36 AN-M69X

Operation: The spring-loaded safety plunger jumps out of the Fuze M1 upon release from the cluster, arming the fuze. On impact, the striker overcomes its spring and deto-nates the primer cap, which ignites a lead-coated spitter fuse. The spitter fuse burns from three to five seconds, allowing penetration, and ignites the black-powder booster charge. This ignites the igniter-ejector charge consisting of two bags of black powder and oiled magnesium powder. The combustion blows off the tail cup, ignites the incendi-ary filling and ejects it for a maximum of 75 yards.

Remarks: The bomb and the delay are calculated to permit penetration inside a structure before detonation. The incendiary oil filling is of a very sticky composition and will normally adhere to any object, including vertical walls. The AN-M69X incorporates a 4.5-ounce charge of tetryl to produce an anti-personnel effect. Over-all dimensions of the AN-M69X duplicate those of the AN-M69, but the amount of incendiary mixture is re-duced (0.4 pound less). Operation of the Fuze M1 ignites a safety fuse lead terminating in the Detonator M106, which explodes the tetryl, fragmenting 65% of the bomb case after ejection of the incendiary material, following a pre-determined time delay of 0.5 to 6 minutes (30% - ½ minute; 30% - 2 minutes; 40% - 6 minutes). The time delay is va-ried by adjusting the length of the safety fuse.

Figure 306. 6-pound Incendiary Bomb AN-M69