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Just ordered 80 Firewire "Initiators" from MJG. Question for Mr. Electricmatch: You also have a product called "Composite Rocket Starter". Not clear what the difference is. I assume that the Firewires can be fired with a 9V battery and the Starters require 12V. Is that correct?
firewire requires just less than a volt to fire, and is a quick flame. used for altimiters, and any motor that they fit in, that has black powder, they will work for.
we have found composite motors are harder to light. so the red hot, and composite starters require 12 volts to fire, but as long as you keep the voltage applied, they will continue to burn(up to about 6 seconds) and light the harder to light motors.