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Navigation Flame Float Mk I (Obsolescent) |
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Filler and Weight | ||
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| NA, | |||
| Body and Overall Weight | |||
| NA, 3.2 lb. | |||
| Color | |||
| Cylinder painted red with yellow label on lid | |||
| Type of Round, DODIC | |||
| Navigation Flame Float, NA |
| Description: |
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| The float consists of a cylindrical tin-plate canister with a tin-plate lid, having a central aperture, soldered over the top of the canister, and a slotted brass sealing patch soldered over the aperture. Soldered to the lid is an iron gauze tube, which extends axially nearly to the bottom of the canister, and is closed at its lower end. The annular space outside the gauze tube is filled with granular calcium phosphide. At its base the canister is closed by a cap, which fits over its outside. The canister is surrounded by an outer fabric bag, which is considerably longer than the canister. Secured by a double row of stitching inside the outer fabric bag and above the canister, is a second fabric bag, termed the inner fabric bag. Two eyelets are located above the top of the canister in the walls of the inner and outer fabric bags at different levels. The pull-off line passes through the aperture in the leather patch at the top of the inner fabric bag and through the neck of the outer fabric bag. The aperture has a fairly snug fit on the line. |
| Use: |
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| The float consists of a cylindrical tin-plate canister with a tin-plate lid, having a central aperture, soldered over the top of the canister, and a slotted brass sealing patch soldered over the aperture. |
| Functioning: |
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| When the flame float has been prepared for use by removing the brass sealing Patch and has been dropped into the sea, water enters the canister through the aperture in its J id and passes through the eyelets. The water enters the gauze tube, through which it penetrates into the calcium phosphide filling, Phosphine is then evolved, inflating the inner fabric bag, and providing sufficient buoyancy to bring the flame float to the surface of the sea. The gas escapes from the neck of the outer fabric bag, and takes fire spontaneously on contact with the air, producing a highly luminous flame. |
| Munition Components: |
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| Data Source: |
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| OP 1665 Explosive Ordnance British |
| Munitions Tech Data Sheet: |
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