U.S.N.B.D. - BRITISH BOMBS AND FUZES; PYROTECHNICS; DETONATORS |
GENERAL PURPOSE BOMBS |
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BRITISH BOMB |
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FUZING: |
1000 LB. G.P. |
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Mk I & II - Nose Pistol No. 27, 42, or 44. |
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Tail Pistol No. 28, 30, or 37. |
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Mk III & IV - Tail Pistol No. 28, 30, or 37. |
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COLOR & MARKINGS |
Dark green overall; ½" red |
Mks I - IV |
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band 2" from nose; 2" light |
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green band 9½" from |
(Service) |
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nose. |
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TAIL NO. |
No. 13 Mk I or No. 29 Mk I |
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BODY LENGTH |
52.5" |
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MAX. BODY DIAMETER |
16.15" | |
WALL THICKNESS |
0.77" | |
TAIL LENGTH |
No. 13 Mk I - 35.5" | |
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No. 29 Mk I - 20" |
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TAIL WIDTH |
16" | |
OVERALL LENGTH |
With No. 13 Mk I Tail - 86.5" | |
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With No. 29 Mk I Tail - 71.0" |
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TOTAL WEIGHT |
1072 lbs. (with short tail & Amatol filled | |
CHARGE/WEIGHT RATIO |
33% |
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BODY CONSTRUCTION: |
Mk I – Hollow steel casting open at each end with nose internally threaded to house a nose bush, which is secured and cemented in position, end is bored and threaded for part of its length to take an exploder container screwed and cemented in position. The exploder container is threaded internally in the open end to house a detonator holder, cemented in position and locked with a locking screw. The detonator holder is threaded internally in the open end to take a pistol or a transit plug. The tail end of the bomb only 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 filling plug (male base plate) screws into the tail end of the body, cemented in position. The filling 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 that used in the nose end. |
Mk II – Similar to Mk I, except that the spigot on the tail end of the body for locat-ing 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 the detonator holder are not fitted, the nose being plugged with a special adapter and transit plug which are welded in position. |
Mk IV – Similar to Mk II body, except that the nose is permanently plugged in a simi-lar to the Mk III. |
TAIL CONSTRUCTION: |
No. 13 Mk I – Consists of a tail cone and a cylindrical strut attached to the cone by 4 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 4 wing bolts used for attaching the tail to the bomb body. Arming mechanism consists of an arming spindle at one end of which is attached the fork which engages with the arming fork of the tail pistol. |
No. 29 Mk I – Similar to the No. 13 Mk I, differing only in dimensions, having a short-er tail strut and fins. The fins are not corrugated. Arming vanes protrude beyond cylin-drical strut. |
SUSPENSION: |
Single suspension lug 30" from nose plug tip, consisting of a rectangular stop plate to which is welded a lug. The plate is secured to the bomb body by two screws. |
EXPLOSIVE COMPONENTS: |
Detonators: |
(See Appendix I, page 309) |
Exploders: |
T.N.T. and C.E., with a wax-filled washer between the C.E. and the detonator holder. |
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Filling: |
357 lbs. Amatol 60/40 or 378 lbs. R.D.X./ T.N.T. 60/40 |
REMARKS: |
(1) The Mks I and II may be fuzed at nose or tail or both. Mks III & IV are fuzed in the tail only. The No. 845 anti-disturbance fuze, for-marly incorporated in the nose when the Tail Pistol No. 37 was used, is now obsolate. |
(2) Tail fuze usually painted red when time pistol is used. |
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