Posted: Fri Jul 06, 2007 1:36 pm
Many spudders have used brushed fans, particularly the small "personal" fans you can get at K-mart and similar stores. They are cheap and work very well.
There is a very slight possibility of a brushed fan igniting the fuel. But people (including me) have tried to use small motors as igniters and nobody has ever gotten it to work. (Like frankrede said.) I've also never seen a report of a brushed fan meant for circulation accidentally igniting the gun.
So, a low voltage brushed fan is A-OK for mixing. Treat the gun as you would any loaded gun and an accidental firing when you turn on the fan is not a problem.
Gun powder in a PVC gun is a pretty stupid idea. But it is unlikely that it will generate thousands of PSI.
1. The spud won't hang around long enough for the pressure to get that high. (At a couple hundred PSI the spud'l vaporize, just ask the hybrid builders.)
2. The chamber of a spud gun is orders of magnitude larger than of a rifle, therefore the peak pressure for a given amount of powder is much less.
Besides, how do you hold the powder in place and how do you ignite it?
There is a very slight possibility of a brushed fan igniting the fuel. But people (including me) have tried to use small motors as igniters and nobody has ever gotten it to work. (Like frankrede said.) I've also never seen a report of a brushed fan meant for circulation accidentally igniting the gun.
So, a low voltage brushed fan is A-OK for mixing. Treat the gun as you would any loaded gun and an accidental firing when you turn on the fan is not a problem.
Gun powder in a PVC gun is a pretty stupid idea. But it is unlikely that it will generate thousands of PSI.
1. The spud won't hang around long enough for the pressure to get that high. (At a couple hundred PSI the spud'l vaporize, just ask the hybrid builders.)
2. The chamber of a spud gun is orders of magnitude larger than of a rifle, therefore the peak pressure for a given amount of powder is much less.
Besides, how do you hold the powder in place and how do you ignite it?