Fire Bombs500 lb. Chemical AN-M78
U.S.N.B.D. - UNITED STATES - BOMBS AND FUZES; PYROTECHNICS
SECTION II - INCENDIARY & CHEMICAL BOMBS

DATA:

AN-M76 (Service)

U.S. ARMY - NAVY BOMB

 

   

500 LB. INCEND.

OVERALL LENGTH

59.2 in.

 

BODY LENGTH

45.3 in.  

BODY DIAMETER

14.0 in.  

WALL THICKNESS

0.3 in.  

AN-M76

TAIL LENGTH

13.9 in.  

(Service)

TAIL WIDTH

14.8 in.    

TAIL WEIGHT

12.3 lbs.    

 

     

 

     

 

     

WEIGHTS:

 

 

Type of Filling

Oil gel PT 1

Weight of Filling

180 lbs.    

Total Weight

475 lbs.    

Chg/Wt. 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

BOMB CONSTRUCTION:

The body is of one piece cast steel construction with a base plate welded to body, and a burster tube 3.5 inches in diameter, 35.75 inches long running through the center of bomb welded to the nose and to the base plate. The M115 adapter booster 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 suspension lugs welded on body seven inches on each side of cen-ter of gravity and by a single lug, 180° removed at the center of gravity.

OPERATION:

On impact, the fuzes function and detonate the 1.23 lb. tetryltol burster in the burster tube and initiate the 9 lb. white phosphorous igniter which, in turn, ignites the main filling. The bomb has a dispersal area of about 500 x 600 feet.

REMARKS:

Attention is drawn to the fact that white phosphorous is present in the igniter and proper precautions should be taken in disposiong of these bombs. The incen-diary mixture, PT 1, consisting essentially of paste of magnesium, gasoline, and a thickener, liberates heat at about 4 time that given off by the usual incendiary mix-ture IM.

For COLOR AND MARKINGS, see

INTRODUCTION, Page 100.

Fire Bombs500 lb. Chemical AN-M78