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| U.S.N.B.D. - ROCKETS AND FUZES |
| ROCKET HEADS |
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U.S. ARMY ROCKET |
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OVERALL LENGTH |
17.16 in. |
2.36" ANTI-TANK |
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LENGTH OF HEAD |
8.25 in. | |
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LENGTH OF MOTOR |
7.5 in. | |
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LENGTH OF FIN |
3.93 in. | |
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WEIGHT OF FILLING |
0.5 lbs. | |
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WEIGHT OF PROPELLANT |
0.14 lbs. | |
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WEIGHT OF ROCKET |
3.72 lbs. |
T12 |
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MAXIMUM RANGE |
700 yds. |
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COLOR |
Olive drab | |
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EXPLOSIVE |
Pentolite | |
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GENERAL: |
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The T12 was developed to incorporate the good qualities of other 2T36 rockets and to achieve greater stability in flight, safe operation through a greater temperature range, a bore safe fuze, and a more sensitive fuze to ensure detonation of rocket on ground impact. |
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CONSTRUCTION OF HEAD: |
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The head is similar to the M6A3 with a hollow ogive crimped onto the body, a body union fitting into the base of the body with external threads to receive the motor, and the fuze which is located in the forward end of the motor tube. |
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MOTOR ASSEMBLY: |
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The tail is seamless steel tube 7.5 inches long and 1.3 inches in diameter, internally threaded on the forward end with a rein ring shrunk onto the forward end of strengthe-ning. The fin assembly consists of six fins, six brackets, and a fin ring. The brackets are spot welded to the motor tube and the fins are held in place between the brackets by rivets. The fins are free to rotate 120 degrees. The fin ring which holds the fins in place along the motor, is removed when the rocket is placed in the launcher. |
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The propellant consists of five sticks of ballistite, each 0.37 inches in diameter and 4.15 inches long. |
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FUZE: M400 |
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The safety pin passes through the firing pin and holds it in place. The slider presses forward against the shoulder of the slider. The slider, which is slotted in its forward rim, hocks into a groove in the inner end of the arming pin, holding the arming pin in posi-tion. |
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When the safety pin is withdrawn, the firing pin is held in place by the arming pin. On setback, the slider is forced back against the tension of the slider spring to release the arming pin. The arming pin spring forces the arming pin out until it strikes the wall of the launcher, the inner end of the arming pin still partially engaging the firing pin for bore safety. |
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As the rocket clears the launcher, the arming pin and cap are forced out by the arming spring; the firing pin is held in position by the anti-creep spring. On impact, the firing pin moves forward by inertia to overcomes the anti-creep spring and strike the detonator. |
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The M400 fuze is also used in the M6A4 rocket. |
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