|
|
| BRITISH EXPLOSIVE ORDNANCE |
| Part 1 - Chapter 3 |
| General Purpose Bombs |
|
G.P. 1000-lb., Mks I - IV (Service) |
| Data |
|
Fuzing |
Mks I and II – Nose Pistol No. 27, 42, or 44; Tail Pistol No. 28, 30, or 37 |
|
|
Mks III and IV – Tail Pistol No. 28, 30, or 37 |
|
Color markings |
Dark green over-all; ½-in. red band 2 in. from nose; 2-in. light green band 9½ in. from nose. |
|
Tail No. |
No. 13 Mk I, or No. 29 Mk I |
|
Body length |
52.5 in. |
|
Body diameter |
16.15 in. |
|
Wall thickness |
0.77 in. |
|
Tail length |
No. 13 Mk I, 35.5 in.; |
| No. 29 Mk I, 20 in. | |
|
Tail width |
16 in. |
|
Over-all length |
With No. 13 Mk I Tail, 86.5 in.; with No. 29 Mk I Tail, 71.0 in. |
|
Total weight |
1,072 lb. (with short tail and Amatol filled) |
|
Charge/weight ratio |
33% |
|
Body Construction: |
|
Mk I – The body consists of a hollow steel casting open at each end, with the nose end internally threaded to house a nose bush, which is screwed and cemented in positi-on. The bush is bored and threaded for part of its length to take an exploder container which is screwed and cemented in position. The exploder container is threaded internally in the open end to house a detonator holder, which is also cemented in position and locked with a locking screw. The detonator holder is threaded internally in the open end to take a pistol or transit plug. The after end of the bomb body is shaped externally to take a tail, and is provided with a locating pin to locate the tail when in position on the bomb. A male base plate screw into the tail end of the body and is cemented in position. The filing plug is bored and threaded internally to receive an exploder container, which houses the detonator holder and is inserted and locked in the same manner as the one used in the nose of the bomb. |
|
Mk II – Similar to the Mk I, except that the spigot on the tail end of the bomb body for locating the transit base and the seating on the bomb body for the suspension lug, are omitted. |
|
Mk III – Similar to Mk I, except that the exploder container and detonator holder are not fitted; the nose being plugged with a special adapter and transit plug which are wel-ded in position. |
|
Mk IV – Similar to Mk II body, except that the nose is permanently plugged in a man-ner similar to the Mk III. |
|
Tail Construction |
|
The No. 13 Mk I tail assembly consists of a tail cone, a cylindrical strut attached to the cone by four corrugated fins, and an arming mechanism for arming the tail pistol. A tail ring near the base of the tail cone is drilled to house four wing bolts used for attach-ing the tail to the bomb body. The arming mechanism consists of an arming spindle, one end of which is attached to the fork that engages the arming fork of the tail pistol. |
|
No. 29 Mk I – Similar to the No. 13 Mk I, differing only in dimensions by having a shor-ter tail strut and fins. The fins are not corrugated Arming vanes protrude beyond the cy-lindrical strut. |
|
Suspension: The bomb has a single suspension lug 30 inches from nose plug tip, con-sisting of a rectangular stop plate to which is wekled a lug. The plate is secured to the bomb body by two screws. |
|
Explosive Components |
|
Detonator – (See Part 2, chap. 4, Detonators.) |
|
Exploders – TNT and C.E., with a wax-filled washer between the C.E. and the detona-tor holder. |
|
Filling – 357 lb. Amatol 60/40, or 378 lb. RDX/TNT 60/40. Each end of the bomb has the same sealing arrangement as the 1,900-lb. G.P. |
|
Remarks: The Mks I and II may be fuzed nose or tail, or both. Mks III and IV are fu-zed in the tail only. The Anti-Disturbance Fuze No. 845, formerly incorporated in the nose when the Tail Pistol No. 37 was used, is now obsolete. |
|
The tail fins are usually painted red when a time pistol is used. |
|
|
|
Figure 12 – G.P. 1,000-lb. Bomb Mk I |
|
|
