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| BRITISH EXPLOSIVE ORDNANCE |
| Part 1 - Chapter 3 |
| General Purpose Bombs |
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G.P. 1,900-lb., Mks I and II (Service) |
| Data |
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Fuzing |
Nose Pistol No. 27, 42, or 44; Tail Pistol No. 28, 30, or 37 |
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Color markings |
Dark green over-all; ½-in. red band 2 in. from nose; 2-in. light green band 11¼ in. from nose |
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Tail No. |
No. 14 Mk I |
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Over-all length |
98 in. |
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Body length |
63.2 in. |
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Body diameter |
18.7 in. |
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Wall thickness |
1.15 in. |
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Tail length |
35.3 in. |
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Tail width |
18.7 in. |
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Total weight |
1,785 lb. |
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Charge/weight ratio |
26% |
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Body Construction: |
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Mk I – The body consists of a hollow steel casting open at each end, with the nose end threaded internally to house a nose bush, which is screwed and cemented in positi-on. The bush is bored centrally and threaded for part of its length to take an exploder container. The exploder container is locked to the nose bush by a locking screw, and is threaded internally at the open end to house a detonator holder, which takes a pistol or transit plug. The after end of the bomb body is shaped externally to take the tail, and provided with a locating pin to locate the tail when in position on the bomb. A male base plate screws into the base of the body and is cemented in position. It is bored and threaded internally to receive an exploder container, which houses a detonator holder in the same manner as that at the nose. A flat seating at the center of gravity is drilled and tapped to take four screws which secure a suspension lug. |
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Mk II – Similar to the Mk I, except that the spigot on the tail end of the body for lo-cating the transit base, and the seating on the bomb body for the suspension lug, are omitted. |
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Tail Construction: The No. 14 Mk I tail assembly consists of a tail cone, a cylindrical strut attached to the cone by four fins, and an arming mechanism for arming the tail pis-tol. The tail cone is secured to the body by a tail ring, which houses four wing bolts used to attach the tail to the body. Attached to the tail cone at the rear of the tail ring, is a spider in the form of a cross that supports the forked end of the arming mechanism. The rear of the tail cone is closed by a bush, which supports the arming vane end of the arming mechanism. The arming spindle has a fork on one end, which engages the fork in the tail pistol, and an arming vane on the other end which is secured by a nut and washer. The arming vane and spindle are prevented from rotating during transit by a safety clip. |
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Suspension: The bomb uses single suspension in the form of a stop plate with an in-tegral lug. The plate has four holes for the securing screws in attaching to the bomb body. |
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Explosive Components |
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Detonator – (See Part 2, chap. 4, Detonators.) |
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Exploders – TNT and C.E. |
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Filling – 470 lb. Amatol 60/40, sealed at the nose end with a pad of approved compo-sition, and a ¼-in. layer of TNT into which is pressed a felt washer. The tail end is sea-led with a 3/16-in. layer of TNT, a pad, and a glazeboard washer. The exploder contai-ners are protected from the filling by paper tubes. |
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Remarks: The Ant-Disturbance Fuze No. 845, formerly incorporated in the nose when the Tail Pistol No. 37 was used, is now obsolete. |
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The tail fins are usually painted red when a time pistol is used. |
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Figure 13 – G.P. 1,900-lb. Bomb Mk I |
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