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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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650 LB. DEPTH |
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OVERALL LENGTH |
58.5 in. | |
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BODY LENGTH |
36.4 in. | |
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BODY DIAMETER |
17.7 in. | |
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WALL THICKNESS |
0.12 in. |
Mk 38 (T.N.T) |
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TAIL LENGTH |
29.0 in. |
Mk 49 (Torpex) |
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TAIL WIDTH |
17.7 in. | |
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TAIL WEIGHT |
(Obsolete) |
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WEIGHTS: |
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Type of Filling |
Mk 38: T.N.T.; Mk 49: Torpex |
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Weight of Filling |
Mk 38: 425 lbs.; Mk 49: 472 lbs. |
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Total Weight |
Mk 38: 634 lbs.; Mk 49: 681 lbs. |
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Chg/Wt. Ratio |
Mk 38: 67%; Mk 49: 69% |
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FUZING: |
Nose: |
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AN-M103; AN-M103A1 (Instantaneous setting obly) with modified arming vane. |
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| AN-Mk 219 (Instantaneous) | |
| Athwartship: | |
| AN-Mk 224 or AN-Mk 234 | |
| Tail: | |
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Mk 229; Mk 229 Mod 3 (See Remarks); AN-Mk 230 and Mods. |
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BODY CONSTRUCTION: |
The body is constructed in three pieces, the flat nose and tail piece being welded onto the sheet center tube. The suspen-sion lugs are reinforced with a strip of sheet steel. |
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SUSPENSION: |
Horizontal suspension by the usual two suspension lugs, with threaded holes on each side 90° removed to receive the trun-nion lugs for suspension from dive bombers. |
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COLOR AND MARKINGS: |
T.N.T. loaded bombs have Mark numbers and weight stencilled in yellow; Torpex loaded bombs have marking in blue. |
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TAIL CONSTRUCTION: |
Four vanes supported by a circular strut. |
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REMARKS |
(1) |
AN-Mk 219 will not arm if dropped under 2500 feet. A Mk 219 adapter and an additional Mk 1 auxiliary booster must be used with this fuze. |
| (2) |
Mk 221 arms with difficulty, and should not be used be-cause of delay. |
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| (3) |
An extender is supplied with each bomb to permit installa-tion of the AN-Mk 224 or AN-Mk 234 hydrostatic fuze in the longer athwartship tube. |
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| (4) |
AN-M103 and AN-M103A1 must have special flat nose depth bomb vane. |
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| (5) |
Because of numerous instances in water crash landings where depth bombs fuzed with the AN-Mk 224 or AN-Mk 234 exploded, these two fuzes have been suspended from use. As a consequence, the Mk 38 and Mk 49 may be used only if a nose impact fuze is installed.
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