I was fiddling around with my paintball gun, and I was about to install a QEV in it (makes the bolt cycle faster, among other things), and I thought to myself, "Hey, this is a QEV. QEV=Cannon!" This could make building a mini pneumatic cannon quite easy. What do you guys think? The only thing I coul...

I have a couple of suggestions/questions.

First, blowguns can leak out the side, where the button is. This would be bad for a flamethrower.

Second, I haven't used quick disconnects with propane, but there could be a little leakage around them=no fun.

Just my .02

Good luck! Be safe!

No, I'm not referring to hotgluing the pipe together . I was referring to the bristles. It just seemed like hotglueing the bristles in would lead to them getting popped out.

Ok then, I'm sorry for my question. I hope you feel better for belittling me.

Alright, I will search in the future.

That's basically it right there. I'm going to have a very large air tank, and also it will be filled using a regualted HPA tank. So all in all, lots of air through a small hole. It won't empty like a regular gun since it's only a 1/2" barrel to a large chamber. Barrel choke takes a big role here.

Haha, that's one of the funniest things I've heard in a while. That's actually a good idea, a lot of people could benefit from that.

Oh man, I read that and I just started cracking up.

Well, thanks for that link jack. I suppose I will go with the tooth brush bristle idea. Any idea as to how high of pressures hot glue would go up to on copper pipe? Or should I use epoxy?

BTW the sarcasm wasn't necessary, as the search button isn't always reliable, but thanks for the link anyway.

Hey, I have a couple of questions/ideas that I would like to bounce off you guys. My design is for a burst/full-auto marble gun. It's relatively simple. Look at the picture first. Should I sleeve the copper into PVC, or should I bore out a copper tee and slide the barrel through? Also, and this is t...

Wow, I've been away for way too long. I completely forgot about that . Thanks DYI.

I'm currently working on a marble machine gun, and I would like to sleeve 1/2" copper tubing (it has a 5/8" OD) into another pipe. 3/4" SCH 40 has a loose fit over the copper. My question is, what is the ID of 3/4" SCH 80 pipe?

Thanks in advance.

Thanks guys, I just wanted to be sure. Whenever I thread into a cannon, I try to go through the pipe and a fitting. I should also teflon this like always, correct?

I am currently working on a new project. It is a metered propane combustion launcher built out of ABS cell core pipe. Can I thread my meter directly into the ABS? I haven't worked extensivley with ABS, as I
usually use pressure rated PVC.

Thanks

Thanks for the info, but I'm looking for a regulator like the ones used for CO2, nitrogen, etc. These are adjustable to a certain output. Do these even exist for propane? Could I use one intended for CO2 for propane?

Hey, I'm back after a slight hiatus from spudding due to my pockets being emptied from my copper piston gun. I've built mainly pneumatics, and kinda skipped combustions (I've made your generic one, but I'd like to make an advanced one). My question is, where do I find a pressure regulator for propan...