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| U.S.N.B.D. - BRITISH BOMBS AND FUZES; PYROTECHNICS; DETONATORS |
| PRACTICE BOMBS |
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BRITISH BOMB |
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FUZING |
Simple striker arrangement |
8.5 LB. PRACTICE |
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with detonator-burster | |
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No. 28 Mk I. | |
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COLOR & MARKINGS |
White overall, with two ½" | |
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green bands ½" apart |
Mks I, II, III |
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around center of tail unit |
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OVERALL LENGTH |
16" |
(Service) |
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BODY LENGTH |
12" |
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MAX. BODY DIAMETER |
3.0" |
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WALL THICKNESS |
0.5" |
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TAIL LENGTH |
4" |
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TAIL WIDTH |
3" | |
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TOTAL WEIGHT |
8.5 lbs. |
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BODY CONSTRUCTION: |
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Mks I & III - Molded plastic body, made in three parts - nose section housing striker, center section housing detonator-burster and filling plug, and rear section which is hol-low and closed at rear end. Perforated disc inside rear section supports the end of the detonator burster holder. The center part of the body is filled with lead-antimony balls, with the interstices between tem and all but a 10% air space in the rear section cone, filled with titanium tetrachloride of gunpowder and magnesium turnings. Striker head is retained in handling by a cotter pin, safety pin and shear wire. An annular groove inside the nose portion is filled with lead shot secured by wax. |
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Mk II - Nose fitted for an extension rod. |
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TAIL CONSTRUCTION: |
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Tail assembly consists of a tube moulded into the rear section of the body, with a cylindrical strut attached to the tube by four fins. |
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SUSPENSION: |
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Single suspension lug on a band which fits in a groove in the body and secured in place by a securing screw. |
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EXPLOSIVE COMPONENTS: |
Detonator burster: |
10 grains fulminate of mercury and 7 C.E. |
| Main filling: |
Mks I, II - Tetanium tetrachloride, which, when exposed to atmosphere as detonator-burster breaks open body, froms a cloud of white smoke, marking the point of impact, |
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Mk III - Flash filling, gunpowder and magnesium turnings. |
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REMARKS: |
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1. This bomb is for use against certain targets where a bomb is required to break on impact without causing damage to the target. Due to its low terminal velocity, the bomb is only suitable for low altitude bombing. |
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