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 20 users online :: 3 registered, 0 hidden and 17 guests


Most users ever online was 106 on Sat Jun 14, 2014 4:35 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Short question topic

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Unread postAuthor: POLAND_SPUD » Sat Mar 10, 2012 12:19 pm

lol no hate just trollin :D
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5384
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 7

Unread postAuthor: Brian the brain » Sat Mar 10, 2012 12:49 pm

Well..seller wants 150 Euro for it.
So far I got a 75 bid on my engine.
Not gonna happen.

I'm considering doing a double barrel shotgun mold for aluminium.
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3360
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Reputation: 12

Unread postAuthor: jackssmirkingrevenge » Sun Mar 11, 2012 5:22 am

POLAND_SPUD wrote:lol no hate just trollin :D


"tough love" :D
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 23932
Joined: Thu Mar 15, 2007 11:28 pm
Location: epoxy batcave
Reputation: 50

Unread postAuthor: stuffbuilder » Mon Mar 12, 2012 10:21 pm

I want to splice two co2 tanks together so I only have to have one regulator. I was thinking something like the two tanks with remote lines and quick disconnects leading into a tee and then the regulator, but I don't know if brass pipe fitting can take the pressure or if they even come in the right size.
  • 0

User avatar
stuffbuilder
Corporal
Corporal
 
Posts: 73
Joined: Tue Aug 30, 2011 8:56 pm
Reputation: 0

Unread postAuthor: warhead052 » Mon Mar 12, 2012 10:26 pm

So what's your question. It is possible, and the brass pipe should take the pressure. Galvanized steel definitely will.
  • 0


warhead052
Major General
Major General
 
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm
Reputation: 0

Unread postAuthor: stuffbuilder » Tue Mar 13, 2012 12:50 pm

I don't know what size and type of threads are on the tanks
  • 0

User avatar
stuffbuilder
Corporal
Corporal
 
Posts: 73
Joined: Tue Aug 30, 2011 8:56 pm
Reputation: 0

Unread postAuthor: warhead052 » Tue Mar 13, 2012 12:53 pm

5/8-18UNF-2B You will need to buy an adapter for that. I would suggest looking on ebay.
  • 0


warhead052
Major General
Major General
 
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: MrCrowley » Thu Mar 15, 2012 2:26 am

Ended up buying this:
Image

Has a flow control which is sort of handy I guess. I tried a few shots by just opening it quickly then closing the flow control and I got velocities as low as 100fps less or 100fps more than I had measured at 300PSI with my track pump. I thought maybe I'm not opening it for long enough but I'm pretty sure that with such a short barrel, upping the pressure to 800PSI will maybe only give me an extra 150-200fps, so for all I know I could have been shooting it at close to 800PSI. I'm thinking about doing what you suggested Jack and getting a gauge. I would just shoot it at 800PSI all the time, but 500PSI should be sufficient and save me some gas.

It's kind of annoying that it originally chrony'd a .2g BB at 750fps but then the piston started leaking, I replaced it and it chrony'd at 550fps and then I replaced it again and it chrony's at about 650fps. Tried the original piston again, it works but chrony's at about 600fps. Not sure if my problem is a bad fit, too much friction or weight. Guess I'll try the weight option first and then sand the piston down a bit (1.2cm long section of hard plastic hose filled with hot glue).

Edit: Something else interesting; I've had to heavily over-estimate the gun's specs for GGDT to come up with the right results. It's giving me 550fps when I've got 750fps out of it before.

Edit 2:
It says it takes 16g cartridges but I wonder if it could take 12g too? As long as the length is the same, I think it would work.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10167
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: urgle the danish cow » Thu Mar 15, 2012 4:08 pm

does any one know what pressures a slide valve can take?
  • 0

User avatar
urgle the danish cow
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Sun Jul 26, 2009 4:48 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Fri Mar 16, 2012 12:03 am

Could the blast of CO<sub>2</sub> be interfering with the chrony reading?

I find it helps to fire at a "standard" target while chronying, that way you have another measure for comparison.

MrCrowley wrote:It says it takes 16g cartridges but I wonder if it could take 12g too? As long as the length is the same, I think it would work.


I think the diameter is different so it should work, usually these inflator things are "universal", it should say.

does any one know what pressures a slide valve can take?


Image
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 23932
Joined: Thu Mar 15, 2007 11:28 pm
Location: epoxy batcave
Reputation: 50

Unread postAuthor: Crna Legija » Fri Mar 16, 2012 12:16 am

urgle the danish cow wrote:does any one know what pressures a slide valve can take?



what kind if its a paint ball it would be fine for 1000 psi with out a problem
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: MrCrowley » Fri Mar 16, 2012 12:48 am

jackssmirkingrevenge wrote:I find it helps to fire at a "standard" target while chronying, that way you have another measure for comparison.

I think the diameter is different so it should work, usually these inflator things are "universal", it should say.

Could be an interference problem as today I shot a .2g BB about 2" away and it read about 850fps on the chrony. I've changed the piston again as my last one got munted, the new one gets me about 650-700fps consistently.

Was a real b|tch chronying today, not a cloud in the sky late in the day so the sun wasn't blocked by pieces of cardboard directly over the sensor.

The adapter doesn't thread the cartridge it only pushes it up into a gasket seal with something to puncture it, so as long as it's the same length it should work without any modification (something to add length to the 12g cartridge so it is pushed up in to the pin).
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10167
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: urgle the danish cow » Sun Mar 18, 2012 8:24 pm

Crna Legija wrote:
urgle the danish cow wrote:does any one know what pressures a slide valve can take?



what kind if its a paint ball it would be fine for 1000 psi with out a problem


i mean the ones that JSR recommends for semi-auto
  • 0

User avatar
urgle the danish cow
Sergeant Major
Sergeant Major
 
Posts: 176
Joined: Sun Jul 26, 2009 4:48 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Mar 19, 2012 3:19 am

urgle the danish cow wrote:i mean the ones that JSR recommends for semi-auto


wyz reported leaks at higher (300 ps) pressures. You can get 3000 psi rated paintball slide valves though.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 23932
Joined: Thu Mar 15, 2007 11:28 pm
Location: epoxy batcave
Reputation: 50

Indentify 3 in 1 lathe/Mill

Unread postAuthor: Lazyboy » Tue Mar 20, 2012 5:59 pm

A few months ago I brought this, so I could learn to turn and mill parts for my guns.

Image
I have looked for information on it and the closest I can get is it similar to a HQ400.
I think it is one of the first 3 in 1 from China, about the 1980's.
It is completely manual and very well built

Can anyone translate the label below.
I believe part of it is a web site address


Image[/img]

Thanks for your help
  • 0


Lazyboy
Specialist
Specialist
 
Posts: 49
Joined: Sun Apr 26, 2009 11:50 pm
Reputation: 0

PreviousNext

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot]

Reputation System ©'