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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 3 - PROJECTILE FUZES |
| Section 4 - V.T. FUZES |
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Mk 45 Mods 11 and 12 (Obsolete) |
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Projectiles used in |
3"/50 A.A. |
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Over-all length, inches |
7.7 (approx.) |
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Diameter at base ogive, inch |
2.4 (approx.) |
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Threaded length, inch |
1.0 (approx.) |
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Threads |
12 R.H. |
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Material |
Plastic ogive molded integral to steel base; perforated nose cap molded into forward end of plastic ogive |
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Weight, pounds |
2.40 |
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Minimum range, yards |
600 |
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Energizer |
Wet |
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Centrifugal handling safety switch |
Present |
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Description: This fuze initiates detonation within the maximum influence radius of fifty feet. Burst heights over water at long range will average around 75 feet, with wide variations in burst hight occuring as a result of wave effect and variations in sensitivity between rounds. Burst heights over water at shorter ranges will generally average to lo-wer levels. |
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Random bursts will occur along the trajectory after arming; so that approximately 30 per cent of the rounds will have burst prematurely before approach to a target at extre-mely long range. At long range, after 30 per cent of the rounds have functioned prema-turely, 50 per cent of the rounds will function when passing the target within the sensi-tivity limits of the fuze. |
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These fuze have wet energizers of the reserve type. |
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Employment: This fuze is used for antiaircraft work from a minimum range of 600 yards to the extreme range of the gun. The V.T. Fuze Mk 45 is useful for low-level at-tack against torpedo bombers of surface craft, if it is realized that the fuze functions on approach to water as outlined above. The fuze is less-sensitive at shorter ranges. |
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Remarks: The original V.T. Fuze Mk 45 Mod 11, with longer stem, has been declared unserviceable and recalled, to be replaced by the Mod 12. |
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The V.T. Fuze Mk 45 Mod 12 is currently being replaced by the V.T. Fuze Mk 58. |
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The Auxiliary Detonating Fuze Mk 44 is used in conjunction with these fuzes. |
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Figure 96A. V.T. Fuze Mk 45 (and above) Type |
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