SpudFiles

That was straight from my compressor. I think the gauge was reading 90 psi.

This was just a test. I will be configuring it so that a golfball can be dropped down the barrel (like a mortar) and it will strike a lever that moves the slide check and fires the gun.

It slides rather easily too and with leverage the ball should have no problem closing the check.

What sort of lever did you have in mind?

Something like this? Or more complex?

Originally I was going to go with an overcomplicated design but I reworked it into one similar to what you have with a pushrod. The only difference really will be the chamber. It will form a base that can hopefully allow me to adjust the angle.

Simpler is always better.

I look forward to seeing it completed.

This is what I had in mind originally, way too complicated. I will use your idea.

Thanks for using my idea, I think I'm going to do something similar, involving an 1.5" QEV...

daberno123 wrote:Thanks for using my idea, I think I'm going to do something similar, involving an 1.5" QEV...

And thank you!

For a 1.5" QEV though, I don't think drilling more holes in the slide check will be enough. You might need to pilot the main QEV off a smaller one first.

The QEV already has a second valve built into it for piloting, and the second valve has 1/8" threads in the pilot port. I've measured the pilot volume of the second valve and its under 10cc, so hopefully I won't have to do any modifications to the slide check valve.

But I'll be prepared. I've just recently acquired five 1/4" QEVs so one of them could be added to help pilot.

Built in? That's awesome. Where did you find that?

@ Gippeto: I think about 4 holes of between 2 and 4 mm diameter should be ok, because a blowgun only has about an 8mm hole, and they usually work as pilots, so having 4 4mm holes should allow a faster opening than a blowgun, and also a larger diameter vent.

I think im going to see if I can find what I need to make one today, and have a go.

PVC Arsenal 17: If I manage to build a working slide myself, would you mind if I posted it in this thread, as if it works well it may be of interest to you.

Edit: I have made a working slide valve
http://www.spudfiles.com/forums/home-ma ... ter,0.html

There were a bunch of them on eBay a while back for like $8. Right now its on an unposted gun that will soon be taken apart.

I don't mind at all, troll.

And my valve was one of the $8 ones from ebay. Check my link on page one.

what size is your slide-check? i ask because i'm not sure what size to get for my coaxial (28mm chamber - 15mm barrel)

The inlet is 1/8" NPT female. Outlet is 1/8" NPT male.

It's about 2" long and just over 3/4" diameter at its thickest point.

ok thanks i'll get a 1/8" or 1/4" one then.