Piston Valve Design

SpudFiles

Rules

Chat

FAQ

Memberlist

How-To

Other

Private Messages

Random Cannon

Recent topics

» How you reckon this will
by starman on 12/02/2008 1:17 AM

» We may be on the wrong tr
by MrCrowley on 12/02/2008 1:14 AM

» X-1.1 Mach speed airsoft
by Davidvaini on 12/02/2008 1:12 AM

» stupid little plinker
by starman on 12/02/2008 0:20 AM

» good 6mm barrel found at
by Davidvaini on 12/01/2008 23:08 PM

» Metal water bottle thread
by MrCrowley on 12/01/2008 23:02 PM

» Damage Vid Party!
by Davidvaini on 12/01/2008 22:44 PM

Donate

Why Donate?

	Hi Guest! As you're not registered, some features could be unavailable. Click here if you want to become a member of SpudFiles
	Username: Password: Log me on automatically each visit

SpudFiles Forum Index » Pneumatic Cannon Discussion » Piston Valve Design

Goto page Previous 1, 2, 3, 4, 5

Piston Valve Design

« View previous topic :: View next topic »

Author

Message

LynyrdSkynyrd

Posted: 05/11/2008 15:10 PM Post subject:

Sergeant

Joined: 26 Aug 2006
Posts: 93
198.92 Spud Bux

Thats not a bad idea. Idea

As far as materials are concerned we were planning on using Ultra-High Molecular Weight Polyethylene (UHMW) for the back plate and the piston. everything else is just scheduled pipe fittings. UMHW is oil filled and very slick (and cheap).

I've been getting split impressions on machining it though. Some people say its a [female doggy] to machine others say is easier than most plastics.

Velocity

Posted: 05/11/2008 15:32 PM Post subject:

Brigadier General

Joined: 07 Feb 2006
Posts: 1011
83.82 Spud Bux

LynyrdSkynyrd wrote:

Thats not a bad idea. Idea

I've heard that UHMW Polyethylene is very easy to machine. Also heard good things about Delrin (don't know if they are different; believe they are related).

LynyrdSkynyrd

Posted: 05/11/2008 16:22 PM Post subject:

Sergeant

Joined: 26 Aug 2006
Posts: 93
198.92 Spud Bux

UHMW and Delrin are the "self-lubricating" type plastics. Delrin is a little on the expensive side. And it doesn't have a high impact strength either comparative to UHMW.

DonTheLegend

Posted: 05/11/2008 17:01 PM Post subject:

Sergeant

Joined: 06 Jan 2006
Posts: 86
254.52 Spud Bux

Modified piston, along the lines of what gippeto suggested. Reduces weight without increasing the pilot volume.

Piston v4.PNG

Description:

Filesize:

90.08 KB

Viewed:

13 Time(s)

jrrdw

Posted: 05/11/2008 17:35 PM Post subject:

Donating Moderator
<b>Donating Moderator</b>

Joined: 16 Nov 2005
Posts: 3284
5123.35 Spud Bux

Don, have you built any of this yet?

DonTheLegend

Posted: 05/11/2008 17:53 PM Post subject:

Sergeant

Joined: 06 Jan 2006
Posts: 86
254.52 Spud Bux

No, haven't bought materials yet either.

LynyrdSkynyrd

Posted: 05/11/2008 20:47 PM Post subject:

Sergeant

Joined: 26 Aug 2006
Posts: 93
198.92 Spud Bux

we're just kinda playing with ideas right now.

mike1010

Posted: 05/26/2008 2:10 AM Post subject:

Sergeant Major

Joined: 21 Jun 2007
Posts: 186
33.54 Spud Bux

what design program did you use to make that image it looks great?

DonTheLegend

Posted: 05/26/2008 9:29 AM Post subject:

Sergeant

Joined: 06 Jan 2006
Posts: 86
254.52 Spud Bux

Thanks, we used NX 5 to draw everything, and then we just took images of the screen with snipping tool (Vista only, I think).

Display posts from previous:

Goto page Previous 1, 2, 3, 4, 5

SpudFiles Forum Index » Pneumatic Cannon Discussion » Piston Valve Design

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum