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 59 users online :: 5 registered, 0 hidden and 54 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

My first Coax

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

My first Coax

Unread postAuthor: Drako155 » Fri Apr 09, 2010 1:45 pm

I am a new member here and after looking around for a couple of days I found this post http://www.spudfiles.com/forums/viewtopic,p,282119.html#282119 which was a question about a design for a coax cannon. I have made simple combustion cannons in the past but wasn't really familiar with the other types of cannons before looking through this forum. I decided that the design didn't seem to difficult after looking over the plans and drew out a simple plan for it and began my creation.

Dimensions:

2inx4ft chamber
1inx5ft barrel

I used these pipes because I had them as left overs from some other projects.


I have pressure tested it up to 140psi which is as high as my compressor will go (don't want to go much higher anyway, gauge only goes to 160psi)and I can't hear any leaks. I used thread tape on the gauge and shrader valve to get a good seal. Now all I need to do is give it some color.

I am taking suggestions for color schemes or designs because I have no idea what to do on this thing. I think for my first coax pneumatic it isn't bad.

I do need help with one thing though. I wanted to put it in GGDT but wasn't sure how to set it up. Can somebody help me with the numbers for GGDT? And I would love to test this out but I live in the suburbs and my neighbors might get mad if I start shooting things around my yard, but I'll do it anyway after I come up with some nice ammo for it.
  • 0

Attachments
valvesmall.jpg
cannonsmall.jpg

Drako155
Private
Private
 
Posts: 6
Joined: Fri Apr 09, 2010 12:48 pm
Reputation: 0

Unread postAuthor: clemsonguy1125 » Fri Apr 09, 2010 2:41 pm

Looks ok, but is it servicible, and it looks like it has some dead space like pointed out in the original topic, as for the paint how about camo or flat black, any chance of a video
  • 0

That is all.
User avatar
clemsonguy1125
Major General
Major General
 
Posts: 1485
Joined: Tue Jul 21, 2009 4:00 pm
Location: East Coast
Reputation: 1

Unread postAuthor: Drako155 » Fri Apr 09, 2010 3:43 pm

I don't really plan on servicing it. If it breaks or fails I can just make another one. It wasn't expensive enough to worry about. I'm working on ammo for it now and once I come up with something I'm happy with I'll try to get a video of it in action, or at least some pictures of the damage.
  • 0


Drako155
Private
Private
 
Posts: 6
Joined: Fri Apr 09, 2010 12:48 pm
Reputation: 0

Unread postAuthor: Gun Freak » Fri Apr 09, 2010 3:46 pm

clemsonguy1125 wrote:Looks ok, but is it servicible, and it looks like it has some dead space like pointed out in the original topic, as for the paint how about camo or flat black, any chance of a video


isn't it is just a ball valve cannon with the barrel inside the chamber? not a piston valve? yeah also the dead space was pointed out in the other thread, did you even read it drako? it has a negative effect, but probably not that noticeable. nice cannon. will look nice with a paint job.
  • 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: clemsonguy1125 » Fri Apr 09, 2010 5:11 pm

Like gun freak said and mrC Said does the gun have a piston, but I guess by saying coax it doesn't have to be a piston valve, just that the barrels in the chamber, how about some damage pics
  • 0

That is all.
User avatar
clemsonguy1125
Major General
Major General
 
Posts: 1485
Joined: Tue Jul 21, 2009 4:00 pm
Location: East Coast
Reputation: 1

Unread postAuthor: MrCrowley » Fri Apr 09, 2010 5:24 pm

Yup, no piston valve here folks. Chamber is pretty damn huge, cut it in half but leave the barrel at the same length. Aside from that, not a bad build.
  • 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

Damage Shots

Unread postAuthor: Drako155 » Wed Apr 21, 2010 2:08 pm

Here are some damage shots and picture of the paint scheme. I was shooting at 3/4 inch MDF because that is what I had laying around. I took three consecutive shots without having to make new ammo. It didn't do as good of damage as I had hoped but I was using air compressor pressure so it was only at 120-130psi.

[youtube]http://www.youtube.com/watch?v=ddr7r31ISGY[/youtube][/youtube]
  • 0

Attachments
stillgoodsmall.jpg
Ammo still good. Made from white casting resin. apparently indestructible.
tsrds.jpg
final rear damage
tsfds.jpg
front damage third shot is upper damage. second shot is lower right. sorry about the focus, my camera didn't like this picture
ssrds.jpg
second shot rear damage.
fsrds.jpg
first shot rear damage
fsfds.jpg
first shot front damage
paintvalvesmall.jpg
paint close up
paintsmall.jpg
paint scheme. went with flat back and blue because I had the colors in the garage.
Last edited by Drako155 on Wed Apr 21, 2010 4:23 pm, edited 1 time in total.

Drako155
Private
Private
 
Posts: 6
Joined: Fri Apr 09, 2010 12:48 pm
Reputation: 0

Damage Shots

Sponsored

Sponsor
 


Unread postAuthor: clemsonguy1125 » Wed Apr 21, 2010 2:34 pm

Only 130? Dont go higher than that with pvc, nice paint scheme though.
  • 0

That is all.
User avatar
clemsonguy1125
Major General
Major General
 
Posts: 1485
Joined: Tue Jul 21, 2009 4:00 pm
Location: East Coast
Reputation: 1

Unread postAuthor: Technician1002 » Wed Apr 21, 2010 9:00 pm

I bet you can't wait for the next one.. Try a piston cannon. The change in power is impressive. Nice build for a first cannon. When moving to a piston you eliminate the set of 90 degree elbows in the flow path and have a much shorter path from the chamber to the barrel for much less pressure drop.

I dent car doors with marshmallows using less than 100 PSI. :D
  • 0

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

Unread postAuthor: Drako155 » Wed Apr 21, 2010 9:38 pm

Tech I was thinking about a piston cannon or maybe an advanced combustion. I can't decide which I want to do because I can only fire the piston cannon near to my compressor but if I make a combustion I can transport it wherever I want and still fire it.
  • 0


Drako155
Private
Private
 
Posts: 6
Joined: Fri Apr 09, 2010 12:48 pm
Reputation: 0

Unread postAuthor: clemsonguy1125 » Wed Apr 21, 2010 9:42 pm

But piston valves are more powerful, and typically cheaper
  • 0

That is all.
User avatar
clemsonguy1125
Major General
Major General
 
Posts: 1485
Joined: Tue Jul 21, 2009 4:00 pm
Location: East Coast
Reputation: 1

Unread postAuthor: Drako155 » Wed Apr 21, 2010 9:58 pm

But for me they have very limited mobility.
  • 0


Drako155
Private
Private
 
Posts: 6
Joined: Fri Apr 09, 2010 12:48 pm
Reputation: 0

Unread postAuthor: spudtyrrant » Wed Apr 21, 2010 10:32 pm

Drako155 wrote:But for me they have very limited mobility.
If build right you can fill a piston valve with a bike pump, my 3" porting gun can be filled with a bicycle pump( although i obviously don't do it), or you could just add a small spring behind the piston. :wink: it would definitely be worth it, you would probably at least double your launchers performance.
  • 0

I ♥ ♣'in baby seals
User avatar
spudtyrrant
Colonel
Colonel
 
Posts: 550
Joined: Fri Jan 02, 2009 6:10 pm
Reputation: 0

Unread postAuthor: Drako155 » Sat Apr 24, 2010 3:14 pm

Okay, I have decided to make a piston valve coax and am making the piston driven by a smaller piston as the exhaust valve. I am near completion of it and will start a new thread for it when complete.
  • 0


Drako155
Private
Private
 
Posts: 6
Joined: Fri Apr 09, 2010 12:48 pm
Reputation: 0

Unread postAuthor: Gun Freak » Sat Apr 24, 2010 8:56 pm

wow, a dual piston valve? Awsome.
  • 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

Next

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'