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 75 users online :: 7 registered, 0 hidden and 68 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

4" piston valve help.

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

4" piston valve help.

Unread postAuthor: JDP12 » Tue Aug 05, 2008 4:50 pm

I'm starting work on my massive t-shirt launcher, with a 4" tee serving as the piston housing, but I'm lookin for some tips on the piston itself- any suggestions for what it should be? I tried a 3" endcap but there was a lot of space between it and the walls of the tee- so any suggestions?

Thanks.

ILTBTU
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: LikimysCrotchus5 » Tue Aug 05, 2008 4:55 pm

Well i used a 3 inch endcap and it worked well, but there is still some roughness that i have to sand down because it doesnt always slide easily. But it still works.

By the way, do you mean the walls of the 4 inch pipe? not the tee. Try fitting the 3 inch endcap into a section of 4 inch pipe. Then when setting up the piston, glue in the section of 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

Unread postAuthor: JDP12 » Tue Aug 05, 2008 4:58 pm

umm... where would i put the pipe then?? diagram maybe- i saw your gun but how would i make it so the piston can slide in teh pipe- this should prolly be a really easy thing to figure out but i'm super tired right now, so you might have to bear with me right now, work was bad
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: LikimysCrotchus5 » Tue Aug 05, 2008 5:04 pm

Yea i know what you mean, i worked today too, and it was in the morning :(

I really dont want to go through the trouble of getting a diagram so concentrate and imagine this:

You have a 4 inch tee in your hands. Now you take a piece of 4 inch pipe, and put it in the tee. Perfect fit.

then you find something that fits in the ID of the 4 inch pipe. Thats the piston.
  • 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: JDP12 » Tue Aug 05, 2008 5:22 pm

oh duh, so something like this?


and is a 3/4" QEV enough to pilot such a massive valve, or should i have two??

<img src="http://i157.photobucket.com/albums/t79/justhavinagoodtime/crudediagram.jpg?t=1217974880">
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: brogdenlaxmiddie » Tue Aug 05, 2008 5:51 pm

It will pilot it but I'd go for two to make it faster :twisted:
  • 0


brogdenlaxmiddie
Colonel
Colonel
 
Posts: 562
Joined: Sun Jul 22, 2007 2:19 pm
Country: United States (us)
Reputation: 0

Unread postAuthor: SpudFarm » Tue Aug 05, 2008 5:51 pm

that has really small frontal area on that diagram ....
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: LikimysCrotchus5 » Tue Aug 05, 2008 5:52 pm

Yes, thats what i was talking about. And i used a 3/4 inch qev so i dont see why you cant.
  • 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: JDP12 » Tue Aug 05, 2008 5:54 pm

spudfarm- it was a 30 second drawing. wasn't mean to be accurate in any way at all...

cool..only now i have to order new parts because... basically i want more power than i did when i made the first order :D:D:D

do you guys think a 4 inch 2 foot long chamber will provide sufficient power???
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: LikimysCrotchus5 » Tue Aug 05, 2008 9:12 pm

Sure, but it wouldnt match my power :D
  • 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: JDP12 » Tue Aug 05, 2008 9:17 pm

lol i might go bigger idk... budget dependent..
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: Gippeto » Tue Aug 05, 2008 9:19 pm

Have you concidered somethng like this?

It pilots very nicely with a modded blowgun.

The idea could be scaled up to what you need.
  • 0

Attachments
Piston valve 2.JPG
"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2394
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'