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| U.S. EXPLOSIVE ORDNANCE |
| PART 3 - PYROTECHNICS |
| Chapter 9 - GROUND PYROTECHNICS |
| Section 1 - SIGNALS |
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Projector Type M17 - M22 Series (Obsolete) |
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Length without tail, inches |
6.0 |
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Diameter, inches |
1.6 |
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Delay, seconds |
6 |
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Height of trajectory, feet |
600 |
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Description: The signal is assembled in a cylindrical case, and equipped with a finned tail assembly 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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Operation: The signal is insert nose-first into Ground Projector M3 or M4. The projec-tor 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 approxi-mately 100 feet. The signal then reverses itself and reaches an altitude of approximately 600 feet. |
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Weight |
Fin |
Embossed |
Star(s) |
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M17 |
0.68 |
White |
WP |
White - parachute-supported star |
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M18 |
0.74 |
White |
WS |
White - cluster of five stars |
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M19 |
0.66 |
Green |
GP |
Green - parachute-supported star |
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M20 |
0.76 |
Green |
GS |
Green - cluster of five stars |
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M21 |
0.64 |
Yellow |
AP |
Amber - parachute-supported star |
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M22 |
0.71 |
Yellow |
AS |
Amber - cluster of five stars |
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Figure 198. Signal, Ground, White Star, Parachute, M17 |
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