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US Signal, Ground, Parachute, M17A1, M18A1, M19A1, M20A1, M21A1, M22A1, M51A1, M52A1, M17A1B2, M18A1B2, M19A1B2, M20A1B2, M21A1B2, M22A1B2 |
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Description
The signal is assembled in a cylindrical case and equipped with a finned tail assembly for stabilization purposes. It is similar to the projector type, but modified to be fired from a service rifle or carbine. This type has a hollow stem, which is closed by a cork plug and a wheel-shaped fin. The "A1B2" series is the same as the "A1" series, except that the former indicates steel construction. Special cartridges are used to ignite the propelling charge. Embossed letters on the closing cap indicate color and type of star(s).
Functioning
Remove the cork plug from the tail and place the signal on a rifle launcher. Place the butt of the rifle on the ground as far away as practicable. When the rifle is fired, the cartridge fires the primer, which in turn ignites the propelling charge. The signal travels approximately 100 feet and then reverses itself and reaches an altitude of approximately 600 feet.
See Also
Nothing else to see.
Source(s)
OP 1664, Volume 1 - US Explosive Ordnance (1947)
USNBD - Bombs and Fuzes, Pyrotechnics (1945)
