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T.I. 250-lb. Multi-Flash, No. 7 Mks I and II, and No. 21 Mks l, II, III, and IC (Service) |
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Filler and Weight | ||
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| NA, | |||
| Body and Overall Weight | |||
| NA, 220 lb. (approx.) | |||
| Color | |||
| Black over-all, red filling band and in white letters on the body. | |||
| Type of Round, DODIC | |||
| T.I., NA |
| Description: |
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| The flash units are packed around the central tube in seven layers, each of which contains 26 units; and an eighth layer, containing 28 units, is positioned above the central tube. The flash units are positioned so that the primed ends of each two layers contact one of the four primed cambric washers for purposes of ignition; each of these washers engages a strip of primed cambric, which is secured around a set of holes in the central tube. The Bomb No, 7 Mk K differs from the No. 7 Mk I as the No. 1 Mk II differs from the No, 1 Mk I. No. 31 Mk III and IC Body—The body, tail-plate, buster container, and ejector plate of this bomb are the same as in the T.L Bomb No. 1 Mk I, The interior arrangement of the bomb No. 21 Mk III differs from the No. 7 and No. 21 Mks I and II In that the central flash tube extends completely through the bomb to the tail fuze pocket, thus displacing two of the flash units. The Bomb No. 21 Mk IC differs from the No. 21 Mk III as the No. 1 Mk IC differs from the No. 1 Mk III. |
| Use: |
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| No. 7 Mks I and II and No. 21 Mks I and II Bodies.The actual construction of these bombs is the same as that of the No. 1 T.I. Bomb Mk I except for a different arrangement of the filling, which requires a different type of central flash tube and priming, and eliminates the use of the division disc. |
| Functioning: |
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| No. 7 Mks I and II, and No, 21 Mks I and III The explosion of the fuze magazine ignites the buster charge, which transmits its flash to ignite the primed cambric tube, the primed strips around the central tube, the primed washers, and the flash units. The ejection of the flash units is the same as for the Bomb No. 1 Mk I. No. 21 Mk III and IC Bombs: The operation of these bombs, when nose-fuzed, is the same as that for the Mks I and II of the T.I. Bombs No. 7 and No. 21. When tail-fuzed, the flash is transmitted from the tail fuze to the nose buster by the primed cambric tube which meanwhile ignites the units. Ejection is the same as for the Bomb No. 1 Mk III. |
| 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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