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| U.S.N.B.D. - BRITISH BOMBS AND FUZES; PYROTECHNICS; DETONATORS |
| AIRCRAFT PYROTECHNICS |
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BRITISH |
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FUZING |
Percussion igniter |
SMOKE GENERATOR |
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COLOR & MARKINGS |
Light green overall | |
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OVERALL LENGTH |
7.13 in. | |
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MAX. BODY DIAMETER |
2.42 in. | |
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SMOKE COLOR |
Orange |
No. 6 Mks. I & II |
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TOTAL WEIGHT |
1 lb. |
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EMISSION TIME |
2½ min. |
(Service) |
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DESCRIPTION: |
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This smoke generator is designed to be dropped from an aircraft to enable the pilot to ascertain the direction of the wind on the ground before making an emergency land-ing. It consists of a cylindrical metal body containing smoke composition, a plugged composition, and a length of quickmatch. When prepared for use, a percussion igniter replaces the adapter plug. A tail unit is formed intergrally with the body, and the upper end of the body is closed by a lid. The igniter consists of an igniter body, a striker sup-ported above the cartridge base by a shear wire, and a safety pin. The cartridge base includes a small quantity of cap composition located between a percussion cap and an anvil |
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FUNCTIONING: |
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The safety pin is removed just before the generator is dropped. On impact the stri-ker moves downwards, breaks the shear wire, and fires the cap composition in the cartridge base. The flash from the cap composition ignites the quickmatch which, in turn, ignites the priming composition in the adapter. The priming composition ignites the igniter composition which, in turn, ignites the smoke composition. The heat due to the combustion of the smoke composition loosens the metal discs covering the smoke emis-sion holes in the top lid, and the pressure of the smoke forces the discs off the top lid, allowing the smoke to escape to the atmosphere. Orange colored smoke is emitted for about 2½ minutes. |
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