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| U.S.N.B.D. - UNITED STATES - BOMBS AND FUZES; PYROTECHNICS |
| SECTION I - HIGH EXPLOSIVE BOMBS |
| PART III - U.S. NAVY "MK" SERIES BOMBS |
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DATA: |
U.S. NAVY BOMB |
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Mk 12 Mod 2 |
500 LB. G.P. |
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OVERALL LENGTH |
59.5 in. | |
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BODY LENGTH |
42.6 in. | |
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BODY DIAMETER |
14.0 in. | |
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WALL THICKNESS |
0.36 in. |
Mk 12 |
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TAIL LENGTH |
20 in. |
Mk 12 Mod 1 |
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TAIL WIDTH |
19.4 in |
Mk 12 Mod 2 |
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TAIL WEIGHT |
(Obsoletescent) |
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WEIGHTS: |
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Type of Filling |
T.N.T. |
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Weight of Filling |
256 lbs. |
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Total Weight |
504 lbs. |
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Chg/Wt. Ratio |
50% |
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FUZING: |
Nose: |
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AN-Mk 219 (Instantaneous) (Requires Mk 219 adapter ring and one additional Mk I auxiliary booster) |
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Mk 221 (0.01 second delay), Mk 243-0, Mk 244-0-1, Mk 239 |
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| Tail: | |
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Mk 223 (0.01 second delay), Mk 229, Mk 229 Mod 3 |
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BODY CONSTRUCTION: |
One piece steel, forged or drawn; cylindrical with ogival nose. |
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SUSPENSION: |
Horizontal suspension by two lugs or trunnions on band for dive bombing. |
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COLOR AND MARKINGS: |
Grey overall with yellow disc between lugs indicating H.E. |
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TAIL CONSTRUCTION: |
Four sheet metal vanes welded to one which is attached to body by a nut which surrounds the fuze. Box type struts. |
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REMARKS |
Three other 500 lb. G.P. bombs, now obsolete, are: |
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500 lb. Mk III, Mod 1 |
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500 lb. Mk XII, Mod 1 |
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500 lb. Mk IX |
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The 500 lb. Mk 12 Mod 2 is still to be found in the field, but is no longer being manufactured. |
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In order to get a wider selection of possible tail fuzings, use an M 102 adapter booster with a 0.47 inch spacer ring, and install any of the following fuzes: AN-M102A2, M113A1 or M116. |
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The Mk 12 and Mk 12 Mod 1, also declared obsolete, differ from the Mk 12 Mod 2 in that the trunnions are welded to the body, in the former type.
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