Description
The Flash and Sound Signal M74 is designed for simulation of air burst of artillery fire in training troops. It is fired from the Hand Projector M9 or the Pyrotechnic Pistol AN-M8.
The signal consists of an outer case, an expelling charge, and an inner cylindrical case containing the delay fuze and bursting charge. The outer case resembles those of the aircraft double-star type. A percussion primer in the base of the outer case extends into the expelling charge. The expelling charge sets off the delay fuze.
Functioning
When fired, the primer ignites the expelling charge. This ignites the delay fuze and propels the inner case out of the outer case. After a delay of about two and a half seconds, the fuze ignites the burster charge which, in exploding, produces a bright flash and a loud noise.
See Also
Nothing else to see.
Source(s)
OP 1664, Volume 1 - US Explosive Ordnance (1947)
