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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 29 | Mk 37 |
650 LB. DEPTH |
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OVERALL LENGTH |
70.0 in. | 63.0 in. | |
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BODY LENGTH |
41.0 in. | 41.0 in. | |
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BODY DIAMETER |
17.7 in. | 17.7 in. | |
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WALL THICKNESS |
0.12 in. | 0.12 in. | |
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TAIL LENGTH |
36 in. | 29 in. |
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TAIL WIDTH |
17.7 in. | 17.7 in. |
Mk 29 (Obsolete) |
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TAIL WEIGHT |
Mk 37 (Obsolete) |
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WEIGHTS: |
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Type of Filling |
T.N.T. |
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Weight of Filling |
Mk 29: 464 lbs.; Mk 37: 454 lbs. |
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Total Weight |
MK 29: 657 lbs.; Mk 37: 659 lbs. |
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Chg/Wt. Ratio |
Mk 29: 70%; Mk 37: 70% |
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FUZING: |
Nose: |
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AN-M 103 (Instantaneous); AN-M 103A1 |
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| AN-Mk 219 (Instantaneous); Mk 221; Mk 239 | |
| Athwartship: | |
| AN-Mk 224 or AN-Mk 234 | |
| Tail: | |
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Mk 229; Mk 229 Mod 3; AN-Mk 230, Mods. |
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BODY CONSTRUCTION: |
Bombs are manufactured with a hemispherical nose reinforced with steel discs. The suspension lugs are reinforced with a steel strip. Flat nose attachment in the shape of a bucket and fitting down under the nose of the bomb, can be used to improve underwater trajectory. The facant spaces are then filled with plaster of paris. These attachments increase the weight by 72 lbs. |
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SUSPENSION: |
Horizontal suspension by the usual two suspension lugs, with threaded holes on each side 90° removed to receive trunnion lugs for displacment gear of dive-bombing. |
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COLOR AND MARKINGS: |
Painted olive drab or grey overall with an 11 inch yellow disc between the two suspension lugs. May be light grey overall. |
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TAIL CONSTRUCTION: |
Four sheet steel vanes welded to tail cone which is secured to the body by locking nut screwing onto the rear of the body. Annular strut is used around rear of vanes. The tail of the Mk 37 was shortened by 7 inches so that the Mk 229 tail fuze could arm more readily. Otherwise the tail is similar to that of the Mk 29. |
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REMARKS |
(1) |
AN-Mk 219 will not arm under 2500 feet altitude if flat-nose attachment is used. |
| (2) |
Use Mk 219 adapter ring and insert additional auxiliary booster when using AN-Mk 219. |
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| (3) |
AN-M103 or AN-M103A1 will not arm with flatnose attach-ment, unless special arming vanes are used. |
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| (4) |
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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| (5) |
The Mk 29 converted to the Mk 37 by replacing the tail. |
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| (6) |
Because of numerous instances in water crash landings where depth bombs fuzed with the AN-Mk 224 or AN-Mk234 exploded, these two fuzes have been suspended from use. As a consequence, the Mk 29 and Mk 37 may be used only if a nose impact fuze is installed.
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