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| U.S. EXPLOSIVE ORDNANCE |
| PART 6 - BOMBS AND BOMB FUZES |
| Chapter 18 - CHEMICAL, INCENDIARY, AND SMOKE BOMBS |
| Section 2 - "M" Series |
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10-pound Smoke M77 |
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Over-all length, inches |
19.5 |
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Body length, inches |
19.5 |
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Body diameter, inches |
2.9 |
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Filling |
HC |
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Weight of filling, pounds |
9.5 |
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Total weight, pounds |
13 |
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Charge/weight ratio |
73% |
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Fuzing |
M150 |
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Construction: The body is a sheet-steel casing extending the entire length of th bomb. The tail cup fits into the after end of the casing, having a dome housing the Fuze M4. The bomb does not have a device for stabilization in flight; therefore, an all-ways fuze is employed. |
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Suspension |
| Cluster | Adapter | Size | Bombs |
| M29 | M4 |
100# |
14 M77 |
| Quick opening | |||
| E67 | M23 |
500# |
38 M77 |
| Aimable | |||
| E62 | E6R2 |
500# |
38 M77 |
| Aimable |
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Operation: As the bombs 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 H.C. smoke mixture. The heat generated by the burning of the first mixture and the H.C. smoke mixture melts the zinc-alloy fuze body. The smoke is then emitted through the fuze hole in the tail cup. |
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Remarks: Once the arming pin jumps out, the fuze is armed, and any attempt to re-insert the pin may cause the fuze to function. |
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Figure 301. 10-pound Smoke Bomb M77 |
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