SpudFiles

Well "innertube valves" (snap-in schraders) work ok, but Schrader Tank valves work better, I believe that's what he used...

Go to McMaster.com and search for Tank Valve... 1/8" NPT threads are the kind most people use also... only about $2 from McMaster, but about $4 shipping because they send them in big boxes (you could literally fits hundreds of Schraderes in 1 box)...

http://www.geocities.com/cyqlist/valve.html ,look at the valve on the right.It is mostly used on bike tyre and care tyre tubes.They are called scharder valves and are very popular for filling PNEUMATIC cannons.

how big do you need your air chamber any one tell me i busting to know iv got a 2" PVC by 400mm

please HELP

Great gun for a first, a lot better than my first one! I also like the mini feel to it and you have inspired me to make onother mini 8) Nice work! Well done for keeping it clean and aesthetically pleasing, makes it look much better! Now for the next project .......

Please tell me, where did you get the gauge and how to you put it in?

e1337 wrote:Please tell me, where did you get the gauge and how to you put it in?

You can get pressure gauges at almost any hardware store (near the air compressor tools and accessories) or online.

To install one, drill out a hole in the PVC just smaller than the threads on the gauge, where a pipe and fitting overlap - where there are two layers of PVC (this gives the gauge's threads more plastic to grip into, making a more secure bond). If you have a thread tap and die set, that's by far the best way to go, but many of us don't, so we just carefully thread the gauge into the drilled out hole using a wrench. Don't forget to use several layers of Teflon tape around the threads. If you don't have teflon, you can use epoxy on the threads, but Teflon is preferred.

is it the same for the ball valve?

Don't bump year old topics.

Ok for your first, but you need to design it so you can have a stock as well.

Also, I think you should have a much longer barrel. That one is too small, the bullet will not go as far, the barrel should be more like 50cm in length

(Edited to delete double post, and to correct grammar by Pete Zaria)

hey i think you should have a much bigger barrel that is to small the bullet will not go as far the barrel should be 50cm in length

I know but I made this gun with things i had lying around...

cool pretty good looking for a first keep up the good work mate.

I just finished my new combustion cannon check it out:

http://www.spudfiles.com/forums/my-new- ... t8642.html

where did you get the 3 eight of an inch copper tubing from

That gun makes me feel all warm and fuzzy inside... Is that a butterfly valve or a ball valve? Sometimes I just can't tell the difference between the two types of valves from the outside. Beautiful gun! I wish I had a mini that nice looking and simple.

Prosniper: you can get 1/8" copper from Lowes, its there...