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 79 users online :: 4 registered, 0 hidden and 75 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

The "black death" pnuematic paintball gun

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

Unread postAuthor: MrCrowley » Fri Jan 12, 2007 10:56 pm

Can I achieve this mod with a dremel?, Also is their a thread relating to this mod?
  • 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: noname » Fri Jan 12, 2007 11:10 pm

Crowley, actually, sprinkler valves are barrel sealing, unless you put it on backwards, in which case it won't work. Just take apart a sprinkler valve and look at the insides.
  • 0

User avatar
noname
Lieutenant General
Lieutenant General
 
Posts: 2699
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA
Country: United States (us)
Reputation: 9

Unread postAuthor: SpudBlaster15 » Fri Jan 12, 2007 11:44 pm

MrCrowley wrote:Can I achieve this mod with a dremel?, Also is their a thread relating to this mod?


I dont believe there is a thread, but there is a page in the Spudwiki detailing the process.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Unread postAuthor: MrCrowley » Fri Jan 12, 2007 11:51 pm

noname wrote:Crowley, actually, sprinkler valves are barrel sealing, unless you put it on backwards, in which case it won't work. Just take apart a sprinkler valve and look at the insides.


Joanna and D_Hall(who made GGDT) claim they are chamber sealers and I have full confidence in both of them.
  • 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: judgment_arms » Sat Jan 13, 2007 12:00 am

Nice gun, nice paint, haven’t read the whole thread, just the first page, but anyway, you should drill a 3/4” hole in the barrel as close to the valve as possible and ream out a coupler and slide it over the hole, that way you have a cheap, simple, and effective breach loader. Oh and, finally somebody who knows the difference between a smooth bore and a rifle! I’m going to finish reading the thread now.
Yeah I’m a little slow at posting…
  • 0

Call me "Judge", it's easier to type.

Spud gun safety rules
User avatar
judgment_arms
Major General
Major General
 
Posts: 1272
Joined: Tue Oct 17, 2006 8:49 pm
Location: Not so beautiful North Carolina, but at least it’s the U.S.A.!
Reputation: 0

Unread postAuthor: MrCrowley » Sat Jan 13, 2007 12:04 am

Lol,goodluck reading the whole thing! :P

I see your still on the whole 'smoothbore' thing :lol:
  • 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: SpudBlaster15 » Sat Jan 13, 2007 12:12 am

I wouldnt bother reading the rest of the thread, just a whole lot of pointless arguing.

I may make a breech loading system tomorrow.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Sponsored

Sponsor
 


Unread postAuthor: judgment_arms » Sat Jan 13, 2007 12:36 am

Well I’ve skimmed over all the pages, got the just of the argument, laughed my head off at joannaardway’s comment on winning an argument (now I know why I lost in my argument about the AR15/.223 round…), but I would like to make a comment on the argument (better late than never), all I know is that a .50-70 (an old black powder buffalo round that used a .50 caliber bullet with 70 grains of powder.) will shoot farther than a .45-70 (another buffalo round that, for some odd reason is still used to day, which uses a .45cal bullet propelled by 70 grains of powder.) the .50-70 holds it’s kinetic energy a lot longer than the .45-70 due to the .50call bullet being significantly heaver than the .45call.
Plus the larger the diameter of your barrel, back to air cannons, the greater the flow coefficient. But since the larger bore usually uses a heaver round the increase in muzzle velocity is not noticed. Now if what I said isn’t true, yell at me and tell me way, I came up with this theory my self, although I’m sure it’s been thought of before.

Oh and MrCrowly, yes I’m still on the smoothbore thing, you got a problem with that punk!?!
  • 0

Call me "Judge", it's easier to type.

Spud gun safety rules
User avatar
judgment_arms
Major General
Major General
 
Posts: 1272
Joined: Tue Oct 17, 2006 8:49 pm
Location: Not so beautiful North Carolina, but at least it’s the U.S.A.!
Reputation: 0

Unread postAuthor: MrCrowley » Sat Jan 13, 2007 2:02 am

No, Not really...jsut a bit odd..thats all.

Oh and spudblaster for the breech its easier to make a turning coupler that covers the whole then one that slides back,I tried both and prefured the first way.
  • 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: SpudBlaster15 » Sat Jan 13, 2007 3:11 am

Yeah I was thinking about drilling a 3/4" hole in the coupler and simply spinning it rather than sliding it back/forward to open/close the breech. Any ideas on sealing it to prevent air leakage around the mechanism?
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Unread postAuthor: MrCrowley » Sat Jan 13, 2007 4:35 am

Well I was very fortunate, I had a 1/2" pvc spigot type thing, Hard to explain, it had 1/2" threads on both ends and the I.D fits perfectly to sleeve over 3/4" pipe, On the threaded ends I had two threaded caps for it,only thing is they had 3/4" holes in them as well...Perfect! So that was my coupler and for some reason it came with 2 thick o-rings which seal and tighten when you tighten the caps, So I made it really tight over the hole and it turns fine but wont move up or down b/c the O-rings create to much friction. So it was perfect for the job, You'll see it on my new PB gun(Brugar engineering were closed today and I couldnt pick up the welded fire extinguisher tanks :( )

If you want pics I can post some later.
  • 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: noname » Sat Jan 13, 2007 11:28 am

Maybe not all sprinkler valves are barrel sealers, but it is a fact that Orbit Watermasters are barrel sealers. A chamber sealing sprinkler wouldn't have an equilization hole one the side of the diaphragm, not next to the seat. I'm not going to get stuck on this.
  • 0

User avatar
noname
Lieutenant General
Lieutenant General
 
Posts: 2699
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA
Country: United States (us)
Reputation: 9

Unread postAuthor: joannaardway » Sat Jan 13, 2007 1:26 pm

Many, if not most, sprinkler valves have an equilisation hole in the centre of the seat - if it were a barrel sealer that simply wouldn't work - any that have that have to be chamber sealers.

Some may be barrel sealers - I'm by no means the definitive expert.

MrCrowley - Paintballs slow down very fast at high speeds. The cannon I mentioned before may fire them at nearly 900 fps, but within 5 metres of the muzzle, it's down to about 820-830 due to drag.

So you may be getting high muzzle velocities - it just may not be instantly apparent.
  • 0

Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
User avatar
joannaardway
Brigadier General
Brigadier General
 
Posts: 949
Joined: Mon Oct 09, 2006 4:57 pm
Location: SW Hertfordshire, England, UK.
Reputation: 0

Unread postAuthor: SpudBlaster15 » Sat Jan 13, 2007 1:45 pm

I believe the Orbit Watermaster is a barrel sealer. When you pressurize it, air bleeds from the chamber, through an equalization hole in the side of the diaphram. The diaphram is pushed downward, where it's sealing face seals off the opening that leads directly to the barrel.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Unread postAuthor: joannaardway » Sun Jan 14, 2007 12:09 pm

It doesn't actually matter much to me - I have little intent to use a sprinkler valve.

I'm just providing the best information I have access to.
  • 0

Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
User avatar
joannaardway
Brigadier General
Brigadier General
 
Posts: 949
Joined: Mon Oct 09, 2006 4:57 pm
Location: SW Hertfordshire, England, UK.
Reputation: 0

PreviousNext

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'