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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 |
Nose fuze No. 848 or 860 |
250 LB. SEA MARKER |
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COLOR & MARKINGS |
Black overall with ½" red | |
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band near the nose; words | |
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"Sea Marker Flame" sten- | |
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cilled in white on both |
No. 19 Mk I |
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body and nose, with the |
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number "19" three places |
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on the nose. |
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TAIL NO. |
No. 35 Mk I |
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OVERALL LENGTH |
34.5 in. |
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MAX. BODY DIAMETER |
12 in. |
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FILLING |
Sodium phosphide and | |
| phosphorous. |
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DESCRIPTION: |
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This bomb consists of the normal 250 lb. T.I. bomb casing (see page 131) without the candles and with an altered internal construction. The canister is divided into two parts by a thin dished plate, the upper part acting as buoyancy chamber and the lower containing the filling. Water inlet holes and a charging hole are drilled through the lower part of the canister. Each inlet hole is covered with wire netting soldered to the inside of the canister, and the charging hole is sealed with a plug. The canister is seated on an ejector plate and is retained in position by a thin metal diaphragm soldered to the bomb body below the tail plate and by six equi-spaced wooden battens extending bet-ween the ejector plate and the diaphragm. |
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FUNCTIONING: |
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On release from the aircraft, the bomb falls in a normal manner until the fuze funct-ions. The explosion of the burster charge forces off the tail plate and ejects the canis-ter. On impact, the water percolates through the inlet holes, and on surfacing, the ge-nerated phosphine gas burns spontaneously, giving a luminous flame about 3 ft. long. At the same time a cloud of white smoke is emitted for about 5 - 8 minutes. |
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