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| U.S. EXPLOSIVE ORDNANCE |
| PART 6 - BOMBS AND BOMB FUZES |
| Chapter 17 - EXPLOSIVE BOMBS |
| Section 4 - NAVY "MK" SERIES |
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500-pound G.P. Mk 3 Mod 1, Mk 9, and Mk 12 Mods 0-2 (Obsolescent) |
| Mk 12 Mod 2 | |
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Over-all length, inches |
59.5 |
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Body length, inches |
42.6 |
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Body diameter, inches |
14.0 |
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Tail length, inches |
20 |
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Tail width, inches |
19.4 |
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Filling |
TNT |
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Weight of filling, pounds |
256 |
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Total weight, pounds |
504 |
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Charge/weight ratio |
50% |
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Fuzing |
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Nose - AN-Mk 219 (Instantaneous). Requires Mk 219 adapter ring and one additional Auxiliary Booster Mk 1. Mk 221 (0.01 second delay), Mk 243 Mod 0, Mk 244 Mods 0-1, Mk 239. |
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Tail - 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 bomb-ing. |
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Color and markings: Grey over all with yellow disc between lugs, indicating H.E. |
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Tail construction: Four sheet metal vanes are welded to a cone which is attached to the body by a nut which surrounds the fuze. Box-type struts are used. |
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Remarks: The 500-pound G.P. Bomb Mk 12 Mod 2 is still to be found in the field, but is no longer being manufactured. The other Marks are obsolete. The Mk 12 and Mk 12 Mod 1 differ from the Mk 12 Mod 2 as follows: Trunnions are welded to the body. They also have two hoisting lugs welded to the body, a female base in plate, and a right-angle fin sleeve instead of the conical type. |
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In order to get a wider selection of possible tail fuzings, use an Adapter Booster M102 with a 0.47-inch spacer ring, and install any of the following fuzes: AN-M101A2, M113A1 or M116. |
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Figure 267. 500-pound G.P. Bomb Mk 12 Mod 2 |
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