geardog32 wrote:whats the impedance of the fan? and whats wrong with just using a 1.5 volt battery for the igniter and separate battery for the fan you already have two switches and this would be simpler and less loss through a bunch of resistors trying to get down to 1.5 volts.

Who said anything about a fan?

I was wondering if anyone new the theory, or even more useful, some equations, to figure out how many times a CO2 cylinder with a defined amount of CO2 can fill a chamber with a defined volume to a defined PSI. For example, a 9 oz (avoirdupois ounces) CO2 cylinder, and a chamber with a volume of 188...

If you have a table saw, that seems like your best bet. The second best would probably be a dremel/roto-tool mounted in some kind of jig to hold it in the correct position. There was a thread with a video on here somewhere about how to do it with a table saw, but I can't seem to find it.

Good practice for implementing the concept, but maybe try something more powerful (like a Dremel or drill, maybe).

I like PCGuy too. Maybe if your company expands, you can call it PCPeople. ...Windows Whisperer Dealing with Windows computers, I usually get a little more aggravated than whispering (screaming at it and kicking the crap out of it comes to mind). It's hard to fix something that is fundamentally flaw...

Wait..is this for a car? The car should really do this for you.. Ha ha ha! I have a feeling that he means something different. A car that didn't mix air with the gasoline would obviously be pretty useless... Maybe you should start mixing some nitrous oxide or potassium nitrate with your gas... Or a...

It's not like you often max out the pressure of the pipe anyway. if you need more strength, use stronger pipe. Coaxials look sweet, are compact, and make it easy to implement a powerful diaphragm valve. It is ypur choice if you want to make a coax or not. I personally love them.

Looks nice! The video is still processing though, so I'll watch it later.

Well, welcome back to the spud gun community! I used to use spudtech, but not as much as spudfiles. it was a pain to keep up on both, and important threads were often posted to both.

Yeah ball valves have great flow. The bad thing is the crap opening time... Most people spring load theirs and a few have made pneumatic rams... It'd be cool to see two together with a ram. You'd have a beast! They'd be great for a first gun, but I think pneumatic rams are a bit overkill (ball valv...

Mr.Sandman wrote:Well a lot of people use a sprinkler valve, but I would recommend a tee piston piston valve piloted by a ball valve as a pilot. Or, you could be really revolutionary and incorporate a qdv as a pilot.

Is the "piston piston valve" something I've never heard of, or do you like redundancy?

yet another relevant thread/link to mention and I don't believe bluetooth should attempt the supah valve without a lathe I think one important question is do you have a belt sander or similar instrument of decent grinding power to slightly trim down the outer diameter of pipes and pipe fittings? Si...

Ohms law: I=V/R where I is current in amps, V is voltage, and R is resistance in ohms. For a standard LED, you don't want to go above .060A, .040A is good. The fans are rated .120A, so its still a good idea to put resistors in series. Keep in mind 9v batteries die really quickly, so you dont need t...

I say you just build a stirrup pump cuz they can get high pressures and in the end there really isn't any chance that they won't work, and your idea doesn't sound very good anyway (no offense). Hand cranking when you can do the same thing with a few strokes of a stirrup pump. Just my opinion. Haha ...

600 psi is nothing to one of these. I believe either Brian or Poland (or both) once took theirs over the 900 psi mark. These things are designed to do a lot of work. Oh! It's one of those high-pressure hand pumps used for pellet guns, or other (some of those go up to 4000PSI or so)! I though it was...