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 52 users online :: 5 registered, 0 hidden and 47 guests


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

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Christmas Present!

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

Christmas Present!

Unread postAuthor: Pilgrimman » Mon Dec 10, 2007 12:57 am

Not for you, you greedy bastards :D

I am considering making my father a spudgun for his christmas present, as he has neither the time nor the expertise to make one, but he really wants one. I have already decided the following: 1) Under 50 $ in cost. 2) Use common materials found at any hardware store. 3) Pneumatic. 4) Use a piston valve. (One that will reseat and seal with only a bike pump providing pressure) 5) Small caliber, like under 1".

My main question is: does anyone know of a common item that can be used for a piston in a 3/4" tee?

Any other suggestions are welcome!
  • 0

Yeah, we wouldn't want to anger the bees, now would we??

I HATE YOU BEES! I HATE YOU BEES! I HATE YOU BEES!

LMAO Classic!!!! I love Family Guy!
User avatar
Pilgrimman
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 481
Joined: Thu Jun 28, 2007 1:10 pm
Location: Grants Pass, OR
Reputation: 0

Unread postAuthor: The Kid » Mon Dec 10, 2007 1:15 am

mabey cast one from epoxy or make one from 2 pvc caps glued together
  • 0

User avatar
The Kid
Staff Sergeant
Staff Sergeant
 
Posts: 117
Joined: Sat Sep 29, 2007 7:50 am
Location: Australia
Reputation: 0

Unread postAuthor: Novacastrian » Mon Dec 10, 2007 1:54 am

Under 50$ you could make a very nice mini-ish combustion.
I'm sure your dad likes "Bangs" as much as the rest of us. :D
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Dec 10, 2007 2:12 am

an epoxy or hot glue case is an easy, effective and cheap solution, especially at 100 psi or so pressures.
  • 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 » Mon Dec 10, 2007 2:37 am

Yeah though I would recommend you start ASAP, first time pistons, or pistons in general can take awhile to configure and get working properly, that's why I would not recommend one as a gift because they are a bit more complicated and can fail easier.
  • 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: rna_duelers » Mon Dec 10, 2007 2:40 am

You could avoid making the piston valve yourself all together and use a QEV or Sprinkler valve and they are both very reliable and relatively cheap.
  • 0

Image
User avatar
rna_duelers
Major General
Major General
 
Posts: 1740
Joined: Mon Sep 26, 2005 7:07 am
Location: G-land Australia
Country: Australia (au)
Reputation: 1

Unread postAuthor: jackssmirkingrevenge » Mon Dec 10, 2007 2:54 am

rna_duelers wrote:You could avoid making the piston valve yourself all together and use a QEV or Sprinkler valve and they are both very reliable and relatively cheap.


I don't think that would fit into the $50 budget. If carefully made, a 3/4" piston can be piloted with a schrader, meaning you can use the same valve to both fill and fire the launcher, saving a bit of cash in the process :)
  • 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

Sponsored

Sponsor
 


Unread postAuthor: rna_duelers » Mon Dec 10, 2007 3:54 am

All depends on which country he comes from,if its USA then he could easily make a small pneumatic with a sprinkler valve for less then $50 and infact so could I.
  • 0

Image
User avatar
rna_duelers
Major General
Major General
 
Posts: 1740
Joined: Mon Sep 26, 2005 7:07 am
Location: G-land Australia
Country: Australia (au)
Reputation: 1

Unread postAuthor: jrrdw » Mon Dec 10, 2007 6:21 am

Add a couple of bucks for shipping and get a kit from www.Bcarms.com. That way it's easy to get what you want, and you can help him build it and teach him a little maby.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6538
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: TurboSuper » Mon Dec 10, 2007 9:25 am

I see sprinkler valves for <$10 on Ebay.

Just use a galvanized steel nipple for the chamber, some copper pipe (or even PVC) for the barrel, and some threaded fittings to hold it all together.

I really don't see how that would exceed $50.
  • 0

"If at first you dont succeed, then skydiving is not for you" - Darwin Awards

TurboSuper
Brigadier General
Brigadier General
 
Posts: 986
Joined: Thu Jun 16, 2005 1:44 pm
Reputation: 0

Unread postAuthor: BigJon » Mon Dec 10, 2007 5:30 pm

I have made a 3/4" steel piston valve before. The piston was made out of a highlighter that fit perfectly when wrapped in tape. I was also able to seal it with a bicycle pump if that helps.
  • 0

User avatar
BigJon
Staff Sergeant
Staff Sergeant
 
Posts: 120
Joined: Wed May 30, 2007 12:21 pm
Reputation: 0

Unread postAuthor: MaxuS » Mon Dec 10, 2007 5:59 pm

I just made my first Bolt Piston in the christmas present for my friend.
Theyre relatively easy to make and work very well. I just used some M6 Rod (6mm), some M6 Nuts, M6 Washers (that happen to fit very well in the housing), some chunky rubber washers and 3 layers of bike innertube as a sealing face.
  • 0

User avatar
MaxuS
Sergeant Major
Sergeant Major
 
Posts: 198
Joined: Sun Sep 02, 2007 5:11 pm
Reputation: 0

Unread postAuthor: Ragnarok » Mon Dec 10, 2007 6:06 pm

I did the same thing as Maxus... or he did the same as me... or something... actually, we both copied it from someone else entirely.

A bolt piston is a nice way of creating a piston, and currently my favourite method because it's low on tool work (two hacksaw cuts, a couple of spanners), pretty customisable and pretty hard to get wrong if you pay a little attention.

If I ever get into larger valves, I'll need to look at a different method, but I like my low bore launchers for the moment. They have a nice "shotgun" feel to them.
  • 0

Does that thing kinda look like a big cat to you?
User avatar
Ragnarok
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Tue Dec 19, 2006 8:23 am
Location: The UK
Reputation: 8

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'