My semifinished cannon.

[Gunner]

As you can see, my cannon is almost ready in principle and I have taken some shots and worked fine pressures 1-2bar with blowgun as pilot valve and pilot channels ID was 5mm, but valve didnt open in higher pressures.
So, next I took the blowgun away.Then I tested could it open if I put my rubberglove on it and then fast take it off from the hole. Well,it worked with pressures 1-5bar but didnt opened in higher pressures.I think that I could fix the problem by drilling the hole 5mm---->10mm and put 1/2" ballvalve to it?(sorry for bad english)

[MaxuS]

Does sound like a pilot problem, the 1/2" ball valve should do it and as you already mentioned, making the hole larger.

[jackssmirkingrevenge]

Could we see your piston?

I love the finish, pity the barrel-chamber bracket looks so "new" as it jars with the weathered look of the copper. Also like the crushed tube method of closing off the chamber

[iknowmy3tables]

did you try modding the blowgun?
detail are in this howto
http://www.spudfiles.com/forums/how-to- ... t7038.html

[Gunner]

I will add this to the "Cannons" when I get my rest parts and then I tell you more details