Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 54 users online :: 4 registered, 0 hidden and 50 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Slide Check Modification

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Unread postAuthor: PVC Arsenal 17 » Sat Aug 16, 2008 4:22 pm

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.
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: daberno123 » Sat Aug 16, 2008 4:42 pm

What sort of lever did you have in mind?

Something like this? Or more complex?

Image
  • 0

User avatar
daberno123
Colonel
Colonel
 
Posts: 594
Joined: Mon Nov 19, 2007 5:56 pm
Location: Ohio
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Sat Aug 16, 2008 4:52 pm

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.
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: daberno123 » Sat Aug 16, 2008 4:57 pm

Simpler is always better. :D

I look forward to seeing it completed.
  • 0

User avatar
daberno123
Colonel
Colonel
 
Posts: 594
Joined: Mon Nov 19, 2007 5:56 pm
Location: Ohio
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Sat Aug 16, 2008 5:03 pm

This is what I had in mind originally, way too complicated. I will use your idea.
Image
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: daberno123 » Sat Aug 16, 2008 5:15 pm

Thanks for using my idea, I think I'm going to do something similar, involving an 1.5" QEV... :D
  • 0

User avatar
daberno123
Colonel
Colonel
 
Posts: 594
Joined: Mon Nov 19, 2007 5:56 pm
Location: Ohio
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Sat Aug 16, 2008 5:30 pm

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


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.
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Sponsored

Sponsor
 


Unread postAuthor: daberno123 » Sat Aug 16, 2008 5:35 pm

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.
  • 0

User avatar
daberno123
Colonel
Colonel
 
Posts: 594
Joined: Mon Nov 19, 2007 5:56 pm
Location: Ohio
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Sat Aug 16, 2008 6:45 pm

Built in? That's awesome. Where did you find that?
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: trollhameran » Sun Aug 17, 2008 2:32 am

@ 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-made-slide-check-valve-for-piloting-t15692,lighter,0.html
  • 0

User avatar
trollhameran
Colonel
Colonel
 
Posts: 515
Joined: Tue Dec 04, 2007 5:41 pm
Reputation: 0

Unread postAuthor: daberno123 » Sun Aug 17, 2008 9:43 am

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.
  • 0

User avatar
daberno123
Colonel
Colonel
 
Posts: 594
Joined: Mon Nov 19, 2007 5:56 pm
Location: Ohio
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Sun Aug 17, 2008 10:51 am

I don't mind at all, troll.

And my valve was one of the $8 ones from ebay. Check my link on page one.
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: ALIHISGREAT » Sun Aug 17, 2008 12:40 pm

what size is your slide-check? i ask because i'm not sure what size to get for my coaxial (28mm chamber - 15mm barrel)
  • 0

<a href="http://www.bungie.net/stats/halo3/default.aspx?player=ALI H IS GREAT"><img src="http://www.bungie.net/card/halo3/ALI H IS GREAT.ashx"></a>
Image
User avatar
ALIHISGREAT
Major General
Major General
 
Posts: 1779
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Sun Aug 17, 2008 12:58 pm

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.
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: ALIHISGREAT » Sun Aug 17, 2008 1:58 pm

ok thanks i'll get a 1/8" or 1/4" one then.
  • 0

<a href="http://www.bungie.net/stats/halo3/default.aspx?player=ALI H IS GREAT"><img src="http://www.bungie.net/card/halo3/ALI H IS GREAT.ashx"></a>
Image
User avatar
ALIHISGREAT
Major General
Major General
 
Posts: 1779
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK
Reputation: 0

PreviousNext

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'