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 38 users online :: 4 registered, 0 hidden and 34 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Mitcho's old idea revamped.... (Now with damage pics)

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

Mitcho's old idea revamped.... (Now with damage pics)

Unread postAuthor: Mitchza89 » Thu Jun 21, 2007 7:34 am

Hey guys

I'm getting over piston cannons... The results just can't beat my old style sprinker valve gun. I really don't think it's the piston thats the problem. It works fine but.... The results just aren't as good as my 1st few sprinker valve designs. I think it's due to the fact that I'm using a 1in valve and a highly modded blowgun for a 15mm barrel. No matter what, the max amount of flow is gonna go through the barrel.

This avo I just got bored and so I pulled all my cannons apart and this is what I came up with.... My most comfortable design to date....The bottle fits perfectly as a stock and it's very nice to hold at the elbow.

....and with my pull-pin pop-off valve soon to be used instead of the blowgun, soon to be my strongest.
  • 0

Attachments
modded.jpg
This is the new mod I'm gonna be adding on pretty soon.
IMG_0726.JPG
IMG_0725.JPG
IMG_0729.JPG
...The exit hole.
IMG_0728.JPG
The shots from the front. At about 80psi for every shot.
Last edited by Mitchza89 on Thu Jun 21, 2007 9:20 pm, edited 1 time in total.
User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Unread postAuthor: lukemc » Thu Jun 21, 2007 7:55 am

looks good your pull pin trigger set up is going to be nice. i think that sprinklers are about the same as pistons on small bore barrels, like 1" or less. however if you want to go bigger than a 1" barrel a piston would be much better suited.

BTW how do you attach your soda bottle? i always ask this and every body does it different
  • 0

"Those who are different change the world. Those who are the same keep it that way"
User avatar
lukemc
Colonel
Colonel
 
Posts: 565
Joined: Sun Feb 25, 2007 8:48 am
Location: NY
Reputation: 0

Unread postAuthor: Mitchza89 » Thu Jun 21, 2007 8:04 am

I just used a 3/4 to 1in Brass Reducer. I filed off the thread on the bottle and screwed the bottle straight in. Because I used a metal fitting, the thread on it just cut straight into the plastic perfectly. It's always been my method for my cannons. It seals perfect, looks clean, it's easy as hell to make and it never fails.

Thanks alot,

Mitch.
  • 0

User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Unread postAuthor: potatoflinger » Thu Jun 21, 2007 8:57 am

That gun looks great, I especially like the mod with the pop off valve.
  • 0

Last edited by potatoflinger on Fri Jun 22, 2007 2:35 pm, edited 1 time in total.
User avatar
potatoflinger
Brigadier General
Brigadier General
 
Posts: 1136
Joined: Thu Nov 02, 2006 3:26 pm
Location: Maryland
Reputation: 1

Unread postAuthor: Hotwired » Thu Jun 21, 2007 8:59 am

Isn't that a pressure relief valve which pops up anyway under a set pressure?
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: Infernal Maveric » Thu Jun 21, 2007 10:10 am

Yeah, but if you use say a pop-valve with a 150PSI limit, and only fill the chamber to 140PSI, then you have a trigger.

I have used a pop-valve for an oly sniper of mine. They work great, are comfortablke and look clean.
  • 0

User avatar
Infernal Maveric
2nd Lieutenant
2nd Lieutenant
 
Posts: 220
Joined: Sat Oct 08, 2005 3:41 pm
Reputation: 0

Unread postAuthor: Acdcmonkey1991 » Thu Jun 21, 2007 2:48 pm

Dude, this is an awesome gun, I want some damage pics! :twisted: Your cannon kind of reminds me of this:

http://www.airsplat.com/Items/GR-HGBB-196LW.htm

YAY: 100 posts!! :D :D
  • 0

VH was awesome!!
Current projects:
C02 Jetpack (CIIJ)
Waterjet vehicle
.177 cal. piston rifle
User avatar
Acdcmonkey1991
Donating Member
Donating Member
 
Posts: 386
Joined: Fri Mar 30, 2007 3:33 pm
Location: Florida
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Mitchza89 » Thu Jun 21, 2007 7:26 pm

Haha thanks alot for all the comments guys. I'll get some damage pics asap when my parents leave for work :P

Infernal Maveric - Is there anyway I can see your sniper that has the pop-off valve on it? Is it on spudfiles?

Thanks alot,

Mitch
  • 0

User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Unread postAuthor: PVC Arsenal 17 » Thu Jun 21, 2007 7:52 pm

I feel your pain man... I'm no good with piston valves. Premade valves are great for us lazy types.

At first glance, your gun resembles a paintball gun because of the configuration. I like it.

Edit: Soda bottles are scary. If I had cash to spare I'd almost consider just sending you a PVC chamber. But, whatever floats your boat I guess!
  • 0


PVC Arsenal 17
Major General
Major General
 
Posts: 1762
Joined: Mon Mar 27, 2006 4:18 pm
Location: United States
Reputation: 1

Unread postAuthor: Mitchza89 » Thu Jun 21, 2007 8:12 pm

Yeah thats one of the next things i'm gonna change but it's gonna be hard getting a pcv chamber like the bottle. It's the perfect size n shape to make it comfortable as hell. I have some 32mm pipe that would make a good chamber. I'm just thinking up a way I can hook it up but still have the same feel as a stock dish out the same performance.


I got some damage pics up. They were done at a range of about 15m at 80 or so psi.
  • 0

User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Unread postAuthor: spud yeti » Mon Jun 25, 2007 6:05 am

Flip thats a cool gun! I really like how it resembles a paintball gun too. Just two questions, how long is your barrel and what did you shoot in the pictures?
Nice work though!
Peace
  • 0

User avatar
spud yeti
Brigadier General
Brigadier General
 
Posts: 1030
Joined: Tue May 08, 2007 1:41 pm
Location: Cape town south africa
Reputation: 0

Unread postAuthor: Mitchza89 » Mon Jun 25, 2007 6:09 am

The barrel is roughly 60-70cm long. I'm not too sure. I plan to lengthen to it about a meter. It's 15mm so I use marbles. they fit pretty darn well.

Thanks alot,

Mitch.
  • 0

User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Unread postAuthor: spud yeti » Mon Jun 25, 2007 6:32 am

That should be cool! You can play around on GGDT to find your optimum barrel length i guess. I love that program! :lol:

btw, where do you come from because you use mm not inches!? Its so nice for a change! (Im in RSA)
  • 0

User avatar
spud yeti
Brigadier General
Brigadier General
 
Posts: 1030
Joined: Tue May 08, 2007 1:41 pm
Location: Cape town south africa
Reputation: 0

Unread postAuthor: dongfang » Mon Jun 25, 2007 2:37 pm

Hi Mitchza89

Is there nothing you do to get a seal when screwing those bottles into 3/4"?

I just tried it. It didn't seal so well for me.. not with teflon tape either. The bottles here seem to be the same size as yours.

Do you think your seal is at the front (where the top of the bottle meets the bottom of the brass fitting) or where the flange on your bottle meets the outer end of the fitting? Do you use teflon tape? Did you test for small leaks in a water bath?

Thanks
Soren
  • 0

User avatar
dongfang
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 448
Joined: Sun Aug 27, 2006 8:02 am
Location: Switzerland
Reputation: 0

Unread postAuthor: Mitchza89 » Mon Jun 25, 2007 7:02 pm

I'd imagine that you filed a little too much of the old thread off the bottle. I made that mistake quite a few times when I had only just gotten into cannons. You have to have enough thickness on the bottle so when you turn on the brass fitting, it's thread bites into the plastic. You don't have to completely file the bottle smooth. Just enough so the bottle fits into the opening of the fitting and bites in when you turn it.

Also, when you have the fitting biting well into the plastic, It can be difficult to turn on without crumpling the bottle. I had a end cap with a schrader screwed onto the other side of the brass fitting. Because the thread on the bottle wasn't set yet, it leaked terribley when you pumped any air into it. But when you do get air in, it's a hell of a lot easier to screw the bottle on without crumpling it. Just do 5 pumps and quickly turn the bottle a little more each time untill you get a real good seal. If you dont get a perfect seal straight away from this method, don't worry. some thread tape will fix it.

I hope this will work for ya but if it doesn't, give us another msg and keep at it. Don't give up!

Regards,

Mitch.
  • 0

User avatar
Mitchza89
Brigadier General
Brigadier General
 
Posts: 1056
Joined: Tue Jan 09, 2007 12:05 am
Reputation: 0

Next

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'