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| BRITISH EXPLOSIVE ORDNANCE |
| Part 1 - Chapter 3 |
| General Purpose Bombs |
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G.P. 250-lb., Mks I, II, and III (Service) |
| Data |
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Fuzing |
Nose Pistol No. 19; Tail Pistol No. 22, or Tail Pistol No. 17 |
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Color markings |
Yellow over-all with a ½-in. red band around nose, 1-in. light green band around body; longitudinal green bar on body and tail indicates explodering scheme. |
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Tail No. |
No. 1 Mk I (Mk III only) |
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Over-all length |
54.2 in. |
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Body length |
28 in. |
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Body diameter |
10.3 in. |
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Wall thickness |
0.6 in. |
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Tail width |
10.2 in. |
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Total weight |
247 lb. (TNT) |
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Charge/weight ratio |
27% |
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Body Construction: This bomb body consists of a streamlined steel casting or forging threaded at the nose to take a nose adapter, which holds the central exploder tube. At the other end of the casting is a threaded base plug through which the exploder tube passes. Welded to the end of the casting is a streamlined section of thin metal, contain-ing no explosive, but tapered to take the tail ring. The exploder also passes through this section. |
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Tail Construction: Four mild steel fins are fastened to a truncated cone, and are re-inforced by a cylindrical strut. The cone fits over the rear section of the bomb body and is held to it by a lock nut over the exploder tube. |
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Suspension: A sinlge suspension lug is secured to the body by four screws. |
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Explosive Components |
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Detonator – Instantaneous. |
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Exploders – TNT, and C.E. pellets. |
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Filling – 68 lb. TNT, or 63 lb. Amatol 80/20. |
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Remarks: Tail fins are usually painted red when a time pistol is used. |
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This bomb, previously declared "Obsolete", has recently been returned to service use by the R.A.F. |
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Figure 9 – G.P. 250-lb. Bomb Mk I |
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