I think you just had some bad luck JSR, I run my lathe and cnc mill close to my shop pc, also the cnc controllers are just self tap screwed onto a piece of wood. I haven't had it blow up yet. I clean the work area at least once a week or so. then use the blower to blow off all the dust and ...

Spitfire, Hi .. Nice to see a fellow south african on here. here is what you do.
go to google and just type things like "1 bar in psi" it will show you the conversion...

So in answer to your last question .. go to google type "1 inch in cm" ... it's like magic i tell ya..

Maybe some more experienced guys can pitch in as well, My first valve had the same issue, turns out it wasn't tight fitting enough so a lot of air were allowed to escape through the pilot as it seeps around the piston.

Don't know the tolerances on your piston, but try a few turns of tape around it ...

Nice, and elegant. I don't see any trigger mechanism, are you just using your thumb to press the pilot schrader at the moment?

Also no loading mechanism yet, are you going to implement these things or just use it as is?

I wish it was legal to bring a proper barrel into my country.

Still nice job.

Hey guys here is some progress pics.

Mostly it's just a mock up for now, I tested and the hammer valve piloted piston valve works perfectly, the hammer valve does take quite a bit to actuate.. but like most problems I will just use a bigger hammer.

So far I tested it to 90psi(6bar) only. As my ...

I'm definately thinking of going semi auto with a revolver style magazine.

On that topic, I cant seem to find a scrap piece of unseamed steel pipe, and buying a whole 6m length of pipe to only use 15cm of it is a bit expensive. The price difference between seamed and unseamed pipe is ridiculous ...

Hi Legija,

Well at this point i'm still gathering parts, so everytime i see something that might work the idea gets designed around it. I plan on using a soda stream bottle it's around 500cc(30ci) estimate, and I'm planning on using as much pressure as I can muster up with a integral pump. The soda ...

Hey i'm from SA, so a windbuks is what they are called. 8)

Here is a picture of the Piston valve, just the pressure from blowing into it with my smokers lungs makes it actuate pretty well, still have to finish the hammer valve that will serve as my pilot valve. it is a solid steel piston, I read a ...

Hey thanks for the info guys. Just read through the build log for that BTB "windbuks" thats what they are called where i'm from.. Brian it absolutely astounds and amazes me how compact you managed to make everything.

Some liberal plagiarism will ensue. :lol:

Gotta love the interwebs! so much info ...

Hi All

Been lurking here a while and is busy planning a .22 calibre airgun, I want to try and keep it a self sufficient weapon by adding a pump into the design, now i've been looking through the forum and cannot really find a clear answer on this.

If i had a cylinder pump with the exact same ...