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| BRITISH EXPLOSIVE ORDNANCE |
| Part 1 - Chapter 17 |
| Obsolete Bombs |
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G.P. 500-lb. Mks I, II and III (Obsolete) |
| Data |
| Fuzing | Nose Pistol No. 19; Tail Pistol No. 17 or 22 |
| Color markings | Yellow over-all; ½-in. red band around nose and 1-in. light green band around body. Light green bar on body and tail indicates ex-plodering scheme |
| Tail No. | No. 1 Mk I (Mk III bomb only) |
| Over-all length | 68.7 in. |
| Body length | 35.7 in. |
| Body diameter | 13 in. |
| Wall thickness | 7/8 in. |
| Tail width | 13 in. |
| Total weight | 509 lb. TNT filled |
| Charge/weight ratio | 28% |
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Body Construction: The body is a streamlined steel casting of forging threaded at the nose to take the nose adapter, which holds the central exploder tube. At the oppo-site end is a threaded base plug through which the exploder tube passes. Welded to the after end of the body is a streamlined cone of thin metal, containing no explosive, which is tappered to take the tail ring. The exploder also passes through this section. |
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Tail Construction: The tail has a truncated cone, which fits over the rear section of the body and is held to it by a locknut over the exploder tube. Four mild-steel fins are fastened to the cone, and are reinforced by a cylindrical strut. |
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Suspension: The bomb is suspended by a single suspension lug secured to the body by four screws. |
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Explosive Components |
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Detonator – Instantaneous |
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Exploder – TNT and C.E. pellets |
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Filling – 143 lb. of TNT, or 134 lb. Amatol 80/20 |
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Remarks: The tail fins are usually painted red when time pistols are used. |
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