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| U.S.N.B.D. - UNITED STATES - BOMBS AND FUZES; PYROTECHNICS |
| SECTION II - INCENDIARY & CHEMICAL BOMBS |
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DATA: |
AN-M78 (Service) |
U.S. ARMY BOMB |
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500 LB. CHEMICAL |
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OVERALL LENGTH |
59.25 in. |
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BODY LENGTH |
46.7 in. | ||
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BODY DIAMETER |
14.0 in. | ||
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WALL THICKNESS |
0.3 in. |
AN-M78 |
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TAIL LENGTH |
13.9 in. |
(Service) |
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TAIL WIDTH |
18.9 in. | ||
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TAIL WEIGHT |
12.3 lbs. | ||
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WEIGHTS: |
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Type of Filling |
Hydrocyanic acid | Phosgene | Cyanogen Chloride |
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Weight of Filling |
100 lbs. (AC) | 250 lbs. (CG) | 165 lbs. (CK) |
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Total Weight |
383 lbs. (AC) | 488 lbs. (CG) | 448 lbs. (CK) |
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Chg/Wt. Ratio |
26.1% |
42.0% |
36.8% |
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FUZING: |
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Regular Missions: |
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Nose: |
AN-M103A1, AN-M103, M103, M127 (Army only, with M117 adapter booster); M128 (Navy only), M135, M135A1, M136, M136A1, M139, M139A1, AN-M139A1, M140, M140A1, AN-M140A1, M163, M164, M165 |
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Tail: |
AN-M101A2, AN-M101A1, M161 |
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VT Missions: |
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Nose: |
T50E4, T90, T92, M166, T82 |
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Tail: |
AN-M101A2 (to ensure detonation in event of VT fuze failure) |
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BOMB CONSTRUCTION: |
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In construction, the AN-M78 resembles the 500 lb. G.P. AN-M64. The body is one piece cast steel with a M15 burster well running the entire length of the bomb. The burster is threaded internally at the nose to receive the nose fuze and at the rear to receive the M115 adapter booster. The base plug consists of a special forg-ing welded to the case containing the M1 needle valve. The tail is a standard box type fin assembly secured to the bomb by a locking nut which threads on to the base plug. Suspension is by two lugs 7 inches on either side of the center of gravity or by a single suspension lug 180° removed at the center of gravity. |
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REMARKS: |
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The M117 adapter booster is used in conjunction with the M127 nose fuze. This nose fuze is required for serial bursts with persistent gas agents. |
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For Color and Markings, see Introduction, page 100. |
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