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| U.S.N.B.D. - UNITED STATES - BOMBS AND FUZES; PYROTECHNICS |
| SECTION III - BOMB FUZES |
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DATA: |
U.S. ARMY FUZE |
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T75, T75E2 |
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BOMBS USED IN |
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T75 |
VB-1 1000 lb. "Azon" | |
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T75E2 |
VB-3 1000 Lb. "Razon" | |
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FUNCTIONING |
M14 interchangeable pri- |
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| mer detonator with delays |
MECHANICAL IMPACT |
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0f .01, .025, .1 or .24 sec. |
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ARMED CONDITION |
No visible sings or arming | |
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FUZES USED WITH |
AN-M103A1, AN-M103, | |
| M139, AN-M139A1, M140, | ||
| AN-M140A1 | ||
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ARMING DATA |
1200 vane revolutions | |
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VANE SPAN |
1.5 in. |
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MATERIAL |
Cadmium plated steel with brass striker block, primer detonator holder, and other small parts. |
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GENERAL: |
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The T75 is an AN-M100A1 series tail fuze modified to fit the VB-1 and VB-3. An anemometer arming system has been installed, and a spacer ring fits around the upper section of the fuze to provide space and support for the fuze. |
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OPERATION: |
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The arming wire is withdrawn upon release of the bomb from the plane permitting the spring loaded arming pin to fly out and freeing the anemometer vanes for rotation. Rig-idly attached to the vane assembly through a gear reduction system, the flexible shaft revolves with the vanes and turns a stem coupling which fits loosely to it. An arming stem riding in a slot in the coupling is threaded out of the firing plunger as the coupling revolves, arming the fuze. |
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Upon impact, the plunger rides forward on its creep spring, hitting the M14 primer detonator, initiating the explosive train. |
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REMARKS: |
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The T75E2 replaces the T75. This fuze is similar to the T75 except that it has a brackte which is designed for mounting a micro-switch, the flexible shaft is .25 in. lon-ger, and the fuze is attached to the spacer ring in a slightly different manner. |
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The micro-switch is loacted opposite the end of the arming stem and is in contact with the arming stem. This switch is wired into the ignition circuit of the guide flare, and is closed by the arming stem as it turns out, after about 350 feet of air travel, thus providing an additional safeguard against accidental iginition of the flare. |
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