If all else fails use primer first, primer sticks to everything and it also opens up the door for different types of paint because basically everything sticks to primer. And if possible use a heat gun in between layers of painting, it speeds up the curing process and just makes your life easier :wink:

Do some research first, a propane metering device would work, but please research before you ask questions like that.

If it was that easy then Joel from spudtech wouldn't be selling and making money off of them. you need a lathe or something similar to a lathe, plus you need lot of experience. Just buy a barrel from spudtech, it willl turn out a lot better then what you can do with 5 bucks.

Gort: ABS may take pressure just fine, but it would never stand long against a piston. So NEVER use ABS in a piston cannon. Ok, if abs took the pressure fine like you said, it would be perfectly fine to use for a piston cannon. PVC is very brittle and can break very easily, ABS is flexible and has a...

Well I'm from Ontario and I phoned the other day and they said as long as its under the muzzle velocity of 500fps it is perfectly fine. Also it doesn't matter what propellant is used (air, combustion)

well, that seems way off, lucky13 got 250 with a 3 times.

I think people are becoming to afraid of hybrids.

Well, it's all up to you on what pressure you want it and the size of the meter. Also yes you can make an offboard meter, you can find two on advanced spuds and also one on neospuds, they're both offboard but different styles. Hopefully that was helpfull to you.

yes, I know how the chemical process works, but I just thought it needed a different glue cause its a thicker pipe.

you can put a regulator on the propane and reg it to a lower pressure, then you can have the meter at a longer length. If you need good instructions go to burnt latke's website.

I'm not that familar with pvc ( live in Canada) but I'm getting some schedule 80 pipe and fittings and wondering if you need a different type of glue for it, besides regular pvc glue.

lmao.....Thats what I've been going by for the past couple of years. Fire a few tennis balls out of my cannon, than run into my garage and wait a hour to use it again.

does anyone know if its legal or not in Canada, cause I can't seem to find a straight answer...

I use mini cat toy tennis balls, i get three for a dollar at the dollar store. they fit perfectly into the pipe, and have a great seal.

hey gort take a look at my original post, first I'm not using abs, and second its going to be a 2" chamber, I'm not making a large cannon at all...And can we get back on topic and finally forget about the abs pipe!!!