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| U.S.N.B.D. - UNITED STATES - BOMBS AND FUZES; PYROTECHNICS |
| SECTION IV - PYROTECHNICS |
| PART I - AIRCRAFT PYROTECHNICS |
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DATA: |
ARMY - NAVY GRENADE |
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WHITE SMOKE |
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LENGTH OF SIGNAL |
5.7 in. | |
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DIAMETER OF SIGNAL |
2.57 in. | |
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WEIGHT OF SIGNAL |
1.68 lb. | |
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BURNING TIME |
3.5 minutes |
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DELAY TIME |
3 seconds |
HC, AN-M8 |
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USE: |
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To attract attention to aviation personnel who have made a forced landing. |
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DESCRIPTION: |
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The cylindrical sheet metal case is nearly full of a solid smoke mixture. A circular zinc cup containing a starting mixture is located in a depression left in the top of the smoke mixture, and is designed to be initiated by a bouchon type of grenade firing mechanism. Adhesive tape covers four 1/4 inch holes in the top of the case until the signal is ready for firing. |
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The grenade is painted gray and marked in yellow with one band, the symbol of the filler, "HC", and the word "smoke". |
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OPERATION: |
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The release lever cotter pin having been removed the release lever is freed by the operator as the grenade is thrown, and is forced off by the striker which is at all times under tension of its spring. The striker moves on its hinge and fires the primer which ig-nites a delay element that in turn ignites the starting mixture. |
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The starting mixture burns through the zinc cup and starts a chemical reaction in the smoke mixture generating considerable heat with the formation of zinc chloride. The zinc chloride escape into the air as a gray-white smoke composed of finely divided solid particles. These particles are highly hygroscopic and become very obscuring liquid part-icles. The grenade burns for about three and a half minutes at full volume. |
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OTHER SMOKE GRENADE SIMILAR TO AN-M8 |
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Colored Smoke Grenade, M16 (obsolescent) |
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Same as AN-M8, may have red, yellow, green, orange, violet, or black smoke. |
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Colored Smoke Grenade, M18 |
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Same as the M16 with burning reduced to one minute for a more dense smoke. Available colors are red, green, yellow, violet. |
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Colored Streamer Smoke Bomb, M87 |
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Eight M18 grenades are inserted into a tube to form a grenade train providing a colored smoke stream type bomb for use as a visual signal for Oboe equipped aircraft. For complete data and illustration see page 323. |
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Red Smoke Grenade, AN-M4 |
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Has a shorter fuze lever and issued in a metal container with three flaps designed to be bent outward to proivde additional bearing surface for use in mud or snow. |
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The AN-M4 is not produced by the Navy. |
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