Posted: Wed Feb 03, 2010 6:54 pm
Don't you just hate that?chinnerz wrote:video:
it failed btw...
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Posted: Wed Feb 03, 2010 8:52 pm
hah. thats was a fail. (video) i'd get a better breach. How come it was so weak? it couldn't penetrate the milk jug.
Posted: Wed Feb 03, 2010 9:05 pm
My guess is that because the breech split, all the pressure was lost, and therefore the projectile failed to penetrate the milk jug.
You should make a breech out of cast epoxy.
You should make a breech out of cast epoxy.
Posted: Thu Feb 04, 2010 12:22 am
spot on mateBigGrib wrote:My guess is that because the breech split, all the pressure was lost, and therefore the projectile failed to penetrate the milk jug.
You should make a breech out of cast epoxy.
Posted: Thu Feb 04, 2010 12:29 am
lol i only just figured out what that wasMcCoytheGreater wrote:Don't you just hate that?chinnerz wrote:video:
it failed btw...
Posted: Thu Feb 04, 2010 3:36 am
Really good job man !!
Go the aussies good luck with the new breach ..
Go the aussies good luck with the new breach ..
Posted: Thu Feb 04, 2010 4:44 am
haha, thanks man.
Posted: Sun Apr 04, 2010 10:44 pm
Aussies all they way!! I'm working on my own air rifle now, hopefully get it up to say 300psi and perhaps a 6mm barrel would be handy, if I can get my hands on come copper pellets...anyway mate good luck with your creation, it's holidays for me now so I can get a lot done on this!
Edit: Heading down to Bunnings, do you think they have 20mm threaded piping? I'm guessing thats the way to build my chamber. I'm using MRR's base for a piston valve, sill don't understand these things yet, maybe when I test it with my chamber on I'll work it out. Wish me luck guys.
Edit: Heading down to Bunnings, do you think they have 20mm threaded piping? I'm guessing thats the way to build my chamber. I'm using MRR's base for a piston valve, sill don't understand these things yet, maybe when I test it with my chamber on I'll work it out. Wish me luck guys.
Posted: Mon Apr 05, 2010 1:11 am
well, i wouldn't suggest starting big, maybe make a small one out of pvc first so you can get all the bugs out of it then make a metal version
Posted: Mon Apr 05, 2010 5:38 pm
how'd you go with your breech ?? did you build a new one yet ??
Posted: Tue Apr 06, 2010 1:09 am
na man i have boon soo busy with school and stuff.... i ended up just using some electrical tape
Posted: Tue Apr 06, 2010 1:15 am
and how did that go for you ?? is it working again
Posted: Tue Apr 06, 2010 4:40 am
yeah, somewhat.... poor design in my part is starting to manifest... i guess piston rifle number 2 will be better.
Posted: Thu Apr 08, 2010 3:12 am
hey great gun,
sorry but this question is a bit off topic but,
i have built a pvc coaxial with a 40mm chamber and cylinder(where piston slides up and down) with a 20mm barrel. My first piston was made of cast hot glue with a 6mm rubber sealing face. my second piston was mae of a 25mm coupling with rubber sealing face bolted on to it. My problem is that the piston seals the barrel, the gun pressurizes but when i try to shoot all the air just escapes out of my blowgun pilot and the piton doesn't even move. Why is this?
sorry but this question is a bit off topic but,
i have built a pvc coaxial with a 40mm chamber and cylinder(where piston slides up and down) with a 20mm barrel. My first piston was made of cast hot glue with a 6mm rubber sealing face. my second piston was mae of a 25mm coupling with rubber sealing face bolted on to it. My problem is that the piston seals the barrel, the gun pressurizes but when i try to shoot all the air just escapes out of my blowgun pilot and the piton doesn't even move. Why is this?
Posted: Thu Apr 08, 2010 4:07 am
how tight is you piston? did you put a equalization port if so try block it up.
if the piston is air tight and you know it make a tiny hole the size of a needle to let air in the chamber
you can also use a bigger pilot valve if it works you need a tighter piston
and try to make piston as light as you can
if the piston is air tight and you know it make a tiny hole the size of a needle to let air in the chamber
you can also use a bigger pilot valve if it works you need a tighter piston
and try to make piston as light as you can