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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: |
M77 |
U.S. ARMY BOMBS |
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10 LB. SMOKE |
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OVERALL LENGTH |
19.5 in. |
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BODY LENGTH |
19.5 in. | ||
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BODY DIAMETER |
2.9 in. | ||
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WALL THICKNESS |
M77 |
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TAIL LENGTH |
(Service) |
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TAIL WIDTH |
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TAIL WEIGHT |
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WEIGHTS: |
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Type of Filling |
HC | ||
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Weight of Filling |
9.5 lbs. | ||
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Total Weight |
13 lbs. | ||
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Chg/Wt. Ratio |
73% |
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FUZING: |
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M150 |
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BODY CONSTRUCTION: |
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The body is a sheet steel casing extending the entire length of the bomb. The tail cup fits into the aft end of the casing, having a dome housing the M4 fuze. The bomb does not have a device for stabilization in flight and therefore an all-ways fuze is employed. |
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SUSPENSION: |
| Cluster | Cluster Adapter | Size | No. of Bombs Carried | Status | |
| M25 | M4 | 100 lb. |
14 M77 |
Service | |
| Ouick opening | |||||
| E67 | M23 | 500 lb. |
38 M77 |
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| Aimable | |||||
| E62 | E6R2 | 500 lb. |
38 M77 |
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Aimable |
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OPERATION: |
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As the bomb are released from the cluster, the arming pin is forced out by its spring, permitting the safety pin to enter the cavity in the striker. Impact forces the striker and sleeve together, piercing the primer which in turn ignites the first fire mixture and subsequently the HC Smoke Mixture. The heat generated by the burning of the first mixture and the HC Smoke Mixture melts the zinc alloy fuze body. The smoke is the emitted through the fuze hole in the tail group. |
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REMARKS: |
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Once the arming pin jumps out, the fuze is armed and any attempt to reinsert the pin may cause the fuze to function. |
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For Color and Markings, see Introduction, page 100 |
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