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 69 users online :: 5 registered, 0 hidden and 64 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [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

Piston problem again

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: nabu92 » Tue Feb 05, 2008 8:40 pm

Yeah, I fixed that earlier today. I really appreciate all the help though.
  • 0


nabu92
Sergeant
Sergeant
 
Posts: 94
Joined: Sat Jan 21, 2006 6:57 pm
Reputation: 0

Unread postAuthor: LikimysCrotchus5 » Tue Feb 05, 2008 9:01 pm

Well while we are on the talk of pilot, pistons, etc. i am going to ask a question.

As you may have heard or not, i am building a 4 inch piston cannon and i am wondering if i can pilot it with a blowgun, keeping in mind that the pilot volume is at its lowest volume. Is this possible? If not, then will a 3/4 inch ball valve be fine?
  • 0

4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

Unread postAuthor: MrCrowley » Tue Feb 05, 2008 9:37 pm

Probably not without O-rings, and yes. Though a 1" sprinkler would be better.

Ragnarok wrote:
MrCrowley wrote:Except that one problem, you know... ah...um... JSR will explain

Or the problem Fat Pants from UKSGC once had. That can't be solved with epoxy either.


I seriously doubt that story, it's all hearsay and sounds like a joke to piss him off.
  • 0

Last edited by MrCrowley on Tue Feb 05, 2008 9:47 pm, edited 1 time in total.
User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: Velocity » Tue Feb 05, 2008 9:40 pm

LikimysCrotchus5 wrote:Well while we are on the talk of pilot, pistons, etc. i am going to ask a question.

As you may have heard or not, i am building a 4 inch piston cannon and i am wondering if i can pilot it with a blowgun, keeping in mind that the pilot volume is at its lowest volume. Is this possible? If not, then will a 3/4 inch ball valve be fine?


A blowgun probably will not work without o-rings (as MrC pointed out). The ball valve should work fine. For best performance and ergonomics, get a small (3/4) QEV and hook the blowgun up to that.
  • 0

User avatar
Velocity
Brigadier General
Brigadier General
 
Posts: 1039
Joined: Tue Feb 07, 2006 5:42 pm
Reputation: 0

Unread postAuthor: LikimysCrotchus5 » Tue Feb 05, 2008 10:55 pm

Ah thank you velocity, and might i say that your americannon (the 4 inch piston one) is beautiful, only of you had the room to shoot it :(

So you are the perfect person to talk to about this matter. I know that you used 2, 3 inch endcaps as a piston and then you said that you modified it.
Can you specifically tell me what you did to the 3 inch endcaps?

I am using one 3 inch end cap as my piston and my problem i encountered is that it is kindof hard to put the sealing face (innertube) on the rounded part because it creates an uneven surface, so how did you put on your sealing face.

I have an idea of a modified piston but im not sure if it would work. My idea is that i would take the 3 inch endcap and saw off the rounded part. Then i would fill it with expanding foam and then when dried i would bolt on the sealing face. Would that possibly work?

I will most likely pick up a 3/4 QEV from Mcmaster which is 40 minutes away from my house. I though about using a 3/4 inch QEV from your cannon actually. I also may replicate something similar to your universal fill-pilot system.

EDIT: Also Velocity, how did you attach the QEV to the plug? Did you drill a hole in the plug? With a 3/4 drill bit, or whatever is closest? Did you attach it with a brass threaded bushing?
  • 0

Last edited by LikimysCrotchus5 on Tue Feb 05, 2008 11:35 pm, edited 1 time in total.
4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

Unread postAuthor: MrCrowley » Tue Feb 05, 2008 10:58 pm

I think Velocity sanded down the end cap to make it fit, not sure, I just hear that's what you have to do.

To get rid of the round end cap face, just get a large metal washer/disk and bolt that onto the front with the sealing face.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: elitesniper » Tue Feb 05, 2008 10:59 pm

LikimysCrotchus5 wrote:Ah thank you velocity, and might i say that your americannon (the 4 inch piston one) is beautiful, only of you had the room to shoot it :(

So you are the perfect person to talk to about this matter. I know that you used 2, 3 inch endcaps as a piston and then you said that you modified it.
Can you specifically tell me what you did to the 3 inch endcaps?

I am using one 3 inch end cap as my piston and my problem i encountered is that it is kindof hard to put the sealing face (innertube) on the rounded part because it creates an uneven surface, so how did you put on your sealing face.

I have an idea of a modified piston but im not sure if it would work. My idea is that i would take the 3 inch endcap and saw off the rounded part. Then i would fill it with expanding foam and then when dried i would bolt on the sealing face. Would that possibly work?

I will most likely pick up a 3/4 QEV from Mcmaster which is 40 minutes away from my house. I though about using a 3/4 inch QEV from your cannon actually. I also may replicate something similar to your universal fill-pilot system.

hey the mcmaster ware house is near your house? so you live some where in LA california?
  • 0

User avatar
elitesniper
Brigadier General
Brigadier General
 
Posts: 1090
Joined: Sat Oct 13, 2007 8:40 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: LikimysCrotchus5 » Tue Feb 05, 2008 11:09 pm

MrCrowley wrote:To get rid of the round end cap face, just get a large metal washer/disk and bolt that onto the front with the sealing face.


But saw off the face first right?

@ elitesniper: No there is one is Aurora, Ohio which is close to Cleveland, Ohio which is were i live.

Also froggy picks up his stuff there too, but he lives in Akron, Ohio which is just about the same distance.
  • 0

Last edited by LikimysCrotchus5 on Tue Feb 05, 2008 11:22 pm, edited 2 times in total.
4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

Unread postAuthor: elitesniper » Tue Feb 05, 2008 11:10 pm

ah, is it a store or a giant ware house?
  • 0

User avatar
elitesniper
Brigadier General
Brigadier General
 
Posts: 1090
Joined: Sat Oct 13, 2007 8:40 pm
Reputation: 0

Unread postAuthor: LikimysCrotchus5 » Tue Feb 05, 2008 11:16 pm

Its a giant warehouse, so all i have to do is call them, then have them direct me to the one is Ohio, then i order through the phone, and then in 45 minutes i can pick it up.
  • 0

4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue Feb 05, 2008 11:51 pm

MrCrowley wrote:Except that one problem, you know... ah...um... JSR will explain :D


There are many problems defined as that one problem, but I'm sure epoxy can be used to solve any one of them :D
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: MrCrowley » Wed Feb 06, 2008 1:19 am

LikimysCrotchus5 wrote:
MrCrowley wrote:To get rid of the round end cap face, just get a large metal washer/disk and bolt that onto the front with the sealing face.


But saw off the face first right?

If you find a a metal disk ~3" in diameter.

But you really don't need to, just put the metal disk on the end cap and sealing face on top of the disk, that way the sealing face can't bend back and is supported by the metal disk.

Okay, this is really simple, listen carefully.

Grab end cap with hole in the back for the bolt.

Grab metal disk and sealing face, both with holes for the bolt.

Grab a small metal washer to stop sealing face getting sucked away.

Put washer on bolt, put sealing face on bolt, put metal disk on bolt, put bolt through the back of the end cap and tighten with nut on the other side.

That's it, now the metal disk will stop the sealing face from flexing back.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: LikimysCrotchus5 » Wed Feb 06, 2008 3:09 pm

Ok i think i got it now, but to ensure that i do understand, i am gonna reiterate im my own words.

So do all of what you said but not on the round side, but the open face where the 3 inch pipe would connect if it was being used as a cap? Then therefore the round part of the cap would be used as a bumper? Unless i use a different configuration.
  • 0

4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

Unread postAuthor: MrCrowley » Wed Feb 06, 2008 10:06 pm

Nope otherway round sorry :)
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: LikimysCrotchus5 » Wed Feb 06, 2008 11:25 pm

Are you being sarcastic? if you arent, then i am not sure what you are talking about. Maybe a diagram? Im sorry that i dont understand. Its been a long day :roll:

But i did get a different idea from what you said, unless its your idea.

so im partially confused now :(

EDIT: Ahh nvm i got it, but dont you think that the metal may scratch the pipe?
  • 0

4SPC, My 4" piston 3" porting cannon
Memo:
Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

PreviousNext

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'