Piston valve help, **PICS NOW UP**

Building or modifying BB, Airsoft, and Pellet type of guns. Show off your custom designs, find tips and other discussion. Target practice only!
User avatar
SpudUke5
Sergeant
Sergeant
Posts: 1099
Joined: Tue Sep 04, 2007 10:16 pm

Fri Jan 25, 2008 10:58 pm

Yea thats basically how it works but it actually leaks through the sides of the piston rather than just straight down. T=you also want the barrel to pertrude into the T so it can get a better seal on the barrel.

but essentially what you hae i correct, just not to scale. You just wanna keep that pilot volume small and you can get the best performance out of your cannon.
4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
devilman
Private 3
Private 3
Posts: 42
Joined: Tue Jan 22, 2008 4:50 am

Sat Jan 26, 2008 12:06 am

when ever i try to make a piston, it wont move inside of the T to form a seal against the barrel, air will leak past it, but because it dosent move the piston it wont seal.

Currently im useing a 1/2" bit of abs pipe with a rubber tap seal thing on it to form the seal.

How much space do people usually leave between the piston and the T that it is housed in? Also what would people suggest to use as thea piston?
Image
Post Reply