500-pound Incendiary AN-M76

Over-all length, inches

Body length, inches

Body diameter, inches

Wall thickness, inch

Tail length, inches

Tail width, inches

Tail weight, pounds

Filling

Weight of filling, pounds

Total weight, pounds

Charge/weight ratio

38%

Fuzing

Nose - AN-M103A1, AN-M103, M103, M135A1, M136, M136A1, M139, M139A1, AN-M139A1, M140, M140A1, AN-M140A1, M163, M164, M165, M166, T82.

Tail - AN-M101A2, AN-M101A1, M161.

Construction: The body is of one-piece cast-steel constructon, with a base plate welded to body. A burster tube 3.5 inches in diameter, 35.75 inches long, running through the center of bomb, is welded to the nose and to the base plate. The Adapter Booster M115 screws into the base plate. The bomb tail is a cast-steel sleeve with four sheet-steel fins and internal box-type struts. Suspension is accomplished by two sus-pension lugs welded on the body seven inches on each side of center of gravity and by a single lug, 180° removed at the center of gravity.

Operation: On impact, the fuzes function and detonate the 1.25-pound tetrytol burs-ter in the burster tube and initiate the nine-pound white phosphorus igniter, which, in turn, ignites the main filling. The bomb has a dispersal area of about 300 by 600 feet.

Remarks: White phosphorus is present in the igniter, and proper precautions should be taken in disposing of these bombs. The incendiary mixture, PT 1, consisting essentially of paste of magnesium, gasoline, and a thickener, liberates heat at about four times that given off by the usual incendiary mixture IM.

Figure 307. 500-pound Incendiary Bomb AN-M76