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 42 users online :: 5 registered, 0 hidden and 37 guests


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

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

My Second Generation Piston Valve cannon

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: Gaderelguitarist » Thu May 13, 2010 9:11 pm

Mr. Gadget, welcome to the good old spudding community. I applaud your efforts with this launcher. You've done your research, obviously came into the field with some experience, and have achieved a very attractive build.

I have never thought to use felt on a piston. I imagine it is adhesive backed.

Overall, I must say I think I may find myself duplicating your design as I find it both ergonomic and attractive. Though given my adherence to woodworking, I may just have to fiddle with some adornments.

Congratulations on the grammar. Not enough people exercise it these days.
  • 0

so many muchness
User avatar
Gaderelguitarist
Colonel
Colonel
 
Posts: 580
Joined: Sat Aug 16, 2008 9:56 pm
Location: Columbia, MD
Reputation: 0

Unread postAuthor: Technician1002 » Thu May 13, 2010 9:43 pm

Felt will glue to wood with a strong bond if wood (Elmers) glue is used to bond it.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: Mr.Gadget » Fri May 14, 2010 7:20 pm

Gaderelguitarist,
I am a nuts and bolt guy. I am more interested in if something works, more than how it looks. For you and your wood working skills, I would love to see what adornments you would add.
What better complement could a person recieve, than to be duplicated, or copied. Feel free to copy my design. I only ask that if you do, try and add something out of creativity.
Have fun.
  • 0


Mr.Gadget
Private
Private
 
Posts: 15
Joined: Sun Apr 25, 2010 10:34 am
Reputation: 0

Unread postAuthor: BearMan » Sun May 16, 2010 9:53 pm

Keep in mind I am brand new here..... I have a couple of newb questions......

Trying to understand how this works.... Is the other end of the sprinkler valve open.... the exhaust? Is it just dumping pressure to allow the valve to move backward?

What size is the main T the piston slides in?

What is the length and travel of the piston? I would like to make something similar but can't quite get it in my head.....

Thanks in advance,

Barry
  • 0


BearMan
Private
Private
 
Posts: 18
Joined: Fri May 14, 2010 8:39 pm
Reputation: 0

Unread postAuthor: BearMan » Sun May 16, 2010 10:01 pm

Is this a similar valve/piston system?

http://gbcannon.com/projects/launchers/gbv.html
  • 0


BearMan
Private
Private
 
Posts: 18
Joined: Fri May 14, 2010 8:39 pm
Reputation: 0

Unread postAuthor: Mr.Gadget » Sun May 16, 2010 10:11 pm

Very similar.
Is that one yours?
I personally did not find it nessesary to get that complex with the piston. I use press on sticky back felt. it gave me a decent seal, and eliminated lube. The hardest part was pealing the paper off of the back of the felt.
Simple, and still functioning perfectly.
  • 0


Mr.Gadget
Private
Private
 
Posts: 15
Joined: Sun Apr 25, 2010 10:34 am
Reputation: 0

Unread postAuthor: BearMan » Mon May 17, 2010 7:36 am

Mr Gadget,

Thanks.... No that is another one with some description that I wanted to use to help understand yours more. Yours is WAY easier to build from the looks of it.

Is yours using a 2" slip/slip tee?

What size is the piston?

Barry
  • 0


BearMan
Private
Private
 
Posts: 18
Joined: Fri May 14, 2010 8:39 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Mr.Gadget » Wed May 19, 2010 4:19 pm

This Cannon, spawned from the ease of parts that already fit together.
Yes it is 2" slip/slip T. The the barrel side, it has a 2" to 1-1/5 slip bushing, cut out the lip inside to allow the barrel to go all the way through.
Then on the 1-1/2 inner barrel, the is a 1-1/2 to 2" adaper to get a 2" barrel back on it.

On the back side with the valve, it has a 2" slip to thread, with a 2" inch piece inside to hold the two together, and provide the housing for the barrel. This is the best part. A 1-1/4 slip/slip coupling fits GREAT!!!! And only requires the outright low tech press on felt. (The 1-1/4 coupling also works great in the 2" barrel as a projectile :lol: ) The piston housing requires sanding on the inside with a high grit sandpaper to make it silky smooth. for the semi auto feature to work at its best... I used 3000 grit. Still much easier than grooving for seals.

I hope you have a good time building one. It was easy, and still works perfectly, I might be somewhere around 300 shots now. I lost track, but man this thing does it's job time after time!!
  • 0


Mr.Gadget
Private
Private
 
Posts: 15
Joined: Sun Apr 25, 2010 10:34 am
Reputation: 0

Unread postAuthor: Gun Freak » Wed May 19, 2010 5:34 pm

Mr.Gadget wrote:This Cannon, spawned from the ease of parts that already fit together.
Yes it is 2" slip/slip T. The the barrel side, it has a 2" to 1-1/5 slip bushing, cut out the lip inside to allow the barrel to go all the way through.
Then on the 1-1/2 inner barrel, the is a 1-1/2 to 2" adaper to get a 2" barrel back on it.

On the back side with the valve, it has a 2" slip to thread, with a 2" inch piece inside to hold the two together, and provide the housing for the barrel.


You mean piston, don't want to be confusing the man :D
  • 0

OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna"M16 BBMGPengunHammer Valve Airsoft SniperHigh Pressure .22 Coax
Holy Shat!
User avatar
Gun Freak
Lieutenant General
Lieutenant General
 
Posts: 4969
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Country: United States (us)
Reputation: 11

Unread postAuthor: BearMan » Wed May 19, 2010 7:02 pm

......
  • 0

Last edited by BearMan on Wed May 19, 2010 7:14 pm, edited 1 time in total.

BearMan
Private
Private
 
Posts: 18
Joined: Fri May 14, 2010 8:39 pm
Reputation: 0

Unread postAuthor: BearMan » Wed May 19, 2010 7:06 pm

Mr Gadget,

THANKS..... I was getting there eventually.... I really appreciate the details. Really helped the process. Will let you know how things go.....

Thanks again,

Barry
  • 0


BearMan
Private
Private
 
Posts: 18
Joined: Fri May 14, 2010 8:39 pm
Reputation: 0

Unread postAuthor: Mr.Gadget » Wed May 19, 2010 7:21 pm

Gun Freak wrote:
Mr.Gadget wrote:This Cannon, spawned from the ease of parts that already fit together.
Yes it is 2" slip/slip T. The the barrel side, it has a 2" to 1-1/5 slip bushing, cut out the lip inside to allow the barrel to go all the way through.
Then on the 1-1/2 inner barrel, the is a 1-1/2 to 2" adaper to get a 2" barrel back on it.

On the back side with the valve, it has a 2" slip to thread, with a 2" inch piece inside to hold the two together, and provide the housing for the barrel.


You mean piston, don't want to be confusing the man :D



LOL!!!!!
:) Yes, that was correct, I did meen the piston. Thank you for the correction. Confusion would be that last thing we need. It just gernerates more questions. Thanks again.
Ya'll know how it goes. Long day at work, kids want dinner. And I am now creating a trip wire land mine. Paintball of course. A.D.D. It is a curse I love.
  • 0


Mr.Gadget
Private
Private
 
Posts: 15
Joined: Sun Apr 25, 2010 10:34 am
Reputation: 0

Previous

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'