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| U.S.N.B.D. - UNITED STATES - BOMBS AND FUZES; PYROTECHNICS |
| SECTION IV - PYROTECHNICS |
| PART II - GROUND PYROTECHNICS |
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DATA: |
U.S. ARMY SIGNALS |
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GROUND SIGNALS |
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LENGTH OF SIGNAL |
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(without tail assembly) |
6.0 in. | |
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DIAMETER |
1.6 in. | |
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DELAY |
6 seconds | |
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HEIGHT OF TRAJECTORY |
600 ft. |
M17 through M22 series |
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M27 High Bursting Range |
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Ground Signal |
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USE: |
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Primarily designed for ground use. |
| DESCRIPTION: |
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The signal is assembled in a cylindrical case, and equipped with a finned tail assemb-ly for stabilization purposes. The primer is located in the head of the signal, and the propelling charge is contained in a small cavity under the head. The end opposite the primer is closed by a press-fit cap to which the tail assembly is attached. The signal has a solid tail stem and an X-shaped fin. Embossed letters on the fin indicate the color and type of star(s). |
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Identification of M17 through M22 series is as follows: |
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Designation |
Weight |
Color of Fin |
Embossed Letters |
Color and Type of Star(s) |
| M17 | 0.68 lbs. | White | WP | White-Parachute |
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supported star |
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| M18 | 0.74 lbs. | White | WS | White-Cluster of five |
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stars |
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| M19 | 0.66 lbs. | Green | GP | Green-Parachute |
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supported star |
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| M20 | 0.76 lbs. | Green | GS | Green-Cluster of five |
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stars |
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| M21 | 0.64 lbs. | Yellow | AP | Amber-Parachute |
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supported star |
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| M22 | 0.71 lbs. | Yellow | AS | Amber-Cluster of five |
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stars |
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OPERATION: |
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The signal is inserted nose first into Ground Projector, M3 or M4. The projector is struck smartly on the ground, causing the primer to strike the projector firing pin. The primer ignites the propelling charge which projects the signal tail first for approximately 100 feet. The signal then reverse itself and reaches an altitude of approximately 600 feet. |
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REMARKS: |
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The M27 High Bursting Range Ground Signal is similar to above signals except that it has no tail assembly. It is fired only from the Ground Signal Projector M1A1. The signal explodes at the top of its rise producing a flash and a puff of smoke. |
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