Pistonsss

[Mr.Russ]

Im gonna make a barrel sealing piston gun, vent it with a blowgun.

THe piston will only be 40mm so that would be okay for venting.


My question is, what do i do with the T? do i put 40mm pvc in it so the piston has a smooth surface with no lumps in it?

what about the third socket? that would be covered from the pipe.

thanks

[Rudesill Ballistics]

One socket is the barrel/outlet, the opposite socket is the pilot (hook another valve to this part), the third socket is connected to your tank/chamber.

Your piston must seal against the barrel port if it is a barrel sealer.

[MrCrowley]

Im gonna make a barrel sealing piston gun, vent it with a blowgun.

THe piston will only be 40mm so that would be okay for venting.


My question is, what do i do with the T? do i put 40mm pvc in it so the piston has a smooth surface with no lumps in it?

what about the third socket? that would be covered from the pipe.

thanks

I suggest you learn your piston valves a bit better before starting out.
Read <A HREF="http://www.spudfiles.com/forums/how-to- ... l">This</a>

[Mr.Russ]

thanks mrcrowley that helped alot.

im going to make one like that but with a marble barrel and a 2" chamber.

My deodorant can has about 2mm difference to the ID of my 2" pipe. could i just wrap it in tape to make the difference?

[MrCrowley]

You could, but it could jam up after awhile, do you have Lynx over there? My can is actually from some foot spray stuff, I figured it fit slightly better then a Lynx can.

Lynx is a pretty good fit, it slides so well it builds up pressure and when you let it go, it flys out the pipe...Good times

[Mr.Russ]

yehh we have lynx over here. i think this gap is to big. i can get a photo for you if ya want..

[MrCrowley]

Hmm thats weird, what pipe ya using? Im used 50mm PVC PN12, maybe your has a different pressure rating.

[Mr.Russ]

i wouldnt have a clue what the pressure rating is, bought it at bunnings they just said it was pressure pipe.

after i think about it its not that much of a difference. heres the can pushed completely to one side of the pipe




also - about the sealing face. do you know if the material underneath mouse pads are alright? if they seal? someone on here said they used that.

[MrCrowley]

The mouse pads can be to porus, in other words, to foamy, they can leak air into the barrel. Just go to bunnings and pick up a rubber gasket(usually black or orange) and get the thickets one you can find.

Check the pipe, it should have PNXX on it, the XX is where a number will be, like mine is PN12, PN12 = Pressure Number 12 BAR, which is around 175psi.

[Mr.Russ]

okay. i only have 25cm of the pipe left.. was going to use that as the chamber is that enough?


ill check the other part of it on my gun too.

[MrCrowley]

Yeah it should be fine for marbles.

[Mr.Russ]

I checked it, this part of the pipe has no writing on it.



Thats my design.. pretty similer to yours but its a basic version.

[MrCrowley]

Yeah that should be fine, You may have a bit of trouble piloting with a blow gun, but you can try, I recommend at least a 10mm ball valve.

[Mr.Russ]

alright. i wanted the blowgun there because its more trigger like, when i twist a ball valve i seem to move the cannon, and sometimes miss a target(uh-oh)

Do you know what brand your pipe fittings are?

[MrCrowley]

Yeah I know what you mean, hook it up with a spring maybe, or mod your blow gun, but it may not be enough.

I think marley, can't remember , it shouldn't matter.