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| VT FUZES FOR PROJECTILES AND SPIN-STABILIZED ROCKETS |
| Chapter 4 - VT FUZES FOR PROJECTILES |
| Mk 32 Mod 0-10, 14, 16-18, 20, 30, 40 (Obsolete) |
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General Data |
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Projectiles Used In 5"/38, 5"/25, 5"/51 A.A. Common. All mods except Mod 30 could be used in the 5"/51 gun at 2600 f/s initial velocity reduced charge only. Mod 30 could not be used in the 5"/51 rounds. |
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Markings |
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Mk 32 Mod ______ |
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Model _____ Lot _____ (and date of designation) |
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Over-All Dimensions and Weight |
| Length | 12 in. (approx.) |
| Diameter at base of ogive | 3.3 in. (approx.) |
| Threaded length | 0.6 in. (approx.) |
| Threads | 2.65 in. 10 R.H. |
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Weight |
6.81 lb. |
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Material. Steel base ring; black lucite plastic nose ogive; aluminum nose cap or metal button tip; steel body cylinder. |
| Arming Range | Mods 0-20, 40 - 700 yd. |
| Mod 30 - 1100 yd. | |
| Type of Energizer | Mods 0-20, 40 - Dry |
| Mod 30 - Reserve | |
| Wave-Suppression-Feature | Mod 40 only |
| Self-Destructive Feature | None |
| Auxiliary Detonating Fuze | Mk 54 (replacing the Fuze Mks 17 and 46) |
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Compression-Type Waterproofing |
No |
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Description |
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This fuze was designed to initiate detonation of the round at the most advantageous point upon approach to a target when passing within the maximum influence radius of about 50 feet. Burst heights above water for all mods without the wave suppression fea-ture were high at most ranges, averaging 130 feet at 12,200 yards in the 5"/38, with burst heights varying widely between rounds. At shorter ranges, burst heights over wa-ter dispersion in burst heights did occur. Those fuzes without the wave-suppression fea-ture were especially affected by water surface conditions. Because of the wave-sup-pression feature, the burst heights above water of the Mod 40 varied between 10 and 50 feet. The Mod 40 had normal sensitivity above about 200 feet from the water, but had automatically reduced sensitivity below that level because of the wave-suppression fea-ture. |
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Employment |
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This fuze was used for antiaircraft fire from 600 yards minimum range (1100 yards for Mod 30) to the extreme range of the gun. The minimum range for employment was less than the arming range given above. The arming range given was the distance at which 90% of the operable rounds would be armed. At the shorter minimum range given for em-ployment, 90% would not be armed; but a sufficient percentage of fuze were armed to make the fire effective at 100 yards less than the arming range given. The Mod 40, with WSF, was recommended for any gun elevation and could be used effectively against tor-pedo bomber attack and PT boat attack. |
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These fuzes are no longer in production or use. They have been replaced by the VT Fuze Mk 53. |
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