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 41 users online :: 2 registered, 0 hidden and 39 guests


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

Registered users: Bing [Bot], Google [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

Re: Short question topic

Unread postAuthor: jackssmirkingrevenge » Sun Dec 17, 2017 7:05 am

The temperature spike is brief, I'd say it would work.
  • 0

hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 25002
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 124

Re: Short question topic

Unread postAuthor: hectmarr » Sun Dec 17, 2017 9:53 am

ok thank you Jack. I'll get a couple of these and try them. When I do, I'll tell you how it was.
  • 0

There is a more powerful driving force than steam,
electricity and atomic energy: the will
User avatar
hectmarr
Captain
Captain
 
Posts: 342
Joined: Sat May 07, 2016 3:49 pm
Country: Argentina (ar)
Reputation: 52

Re: Short question topic

Unread postAuthor: hectmarr » Sun Dec 17, 2017 10:07 am

I found this one over here. I think it is of better quality and is designed for 200 bar, because it is for CNG compressed natural gas of vehicles. It costs almost the same, I will try to get this
  • 0

Attachments
D_Q_NP_821767-MLA26060983115_092017-X.jpg
D_Q_NP_821767-MLA26060983115_092017-X.jpg (12.04 KiB) Viewed 407 times
There is a more powerful driving force than steam,
electricity and atomic energy: the will
User avatar
hectmarr
Captain
Captain
 
Posts: 342
Joined: Sat May 07, 2016 3:49 pm
Country: Argentina (ar)
Reputation: 52

Re: Short question topic

Unread postAuthor: Pvc primer » Sun Dec 17, 2017 9:13 pm

Hey can anyone tell me where I can get a chronograph for cheap? Thanks!
  • 0


Pvc primer
Private
Private
 
Posts: 16
Joined: Sat Dec 16, 2017 8:42 pm
Country: Canada (ca)
Reputation: 1

Re: Short question topic

Unread postAuthor: jrrdw » Mon Dec 18, 2017 8:02 am

Pvc primer wrote:Hey can anyone tell me where I can get a chronograph for cheap? Thanks!


Amazone, Ebay just about every hunting or gun supply store online or walk in on the planet....
  • 0

User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6687
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 37

Re: Short question topic

Unread postAuthor: Zeus » Mon Dec 18, 2017 4:43 pm

Hectmarr, if the valves break after some time, I have a suggestion. If you can put a flow restriction on the chamber side of the valve, like a fitting with a 1mm hole, then that will cool the gasses and help protect the valve
  • 0

/sarcasm, /hyperbole
User avatar
Zeus
Major General
Major General
 
Posts: 1501
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt
Reputation: 8

Re: Short question topic

Unread postAuthor: hectmarr » Tue Dec 19, 2017 6:03 am

Zeus wrote:Hectmarr, if the valves break after some time, I have a suggestion. If you can put a flow restriction on the chamber side of the valve, like a fitting with a 1mm hole, then that will cool the gasses and help protect the valve

In reality, the valve is never destroyed. The problem is that I do not want to make them myself. I need to get some common valve, which is for sale. I use little pressure on the 7X maximum hybrids and the heat is not a problem so far. Thanks for the idea.
  • 0

There is a more powerful driving force than steam,
electricity and atomic energy: the will
User avatar
hectmarr
Captain
Captain
 
Posts: 342
Joined: Sat May 07, 2016 3:49 pm
Country: Argentina (ar)
Reputation: 52

Re: Short question topic

Sponsored

Sponsor
 


Re: Short question topic

Unread postAuthor: Cthulhu » Wed Dec 20, 2017 8:05 am

A have a quick question:
I want to build a cannon which recoils like a ww1/ww2 first gun where a spring absorbs the recoil force and returns the barrel to its original position.
Would it be easier to get more recoil to do this with a combustion or a pneumatic?
  • 0


Cthulhu
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Wed Apr 12, 2017 7:07 pm
Location: South Texas
Country: United States (us)
Reputation: 9

Re: Short question topic

Unread postAuthor: jackssmirkingrevenge » Wed Dec 20, 2017 8:14 am

If you want to maximize recoil, you want a powerful launcher that's also light, in that regard a combustion is definitely easier to achieve, it certainly had enough recoil in my experiments to eject a cartridge:

  • 0

hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 25002
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 124

Re: Short question topic

Unread postAuthor: Cthulhu » Wed Dec 20, 2017 9:17 am

jackssmirkingrevenge wrote:If you want to maximize recoil, you want a powerful launcher that's also light, in that regard a combustion is definitely easier to achieve, it certainly had enough recoil in my experiments to eject a cartridge


Hm, but if I need to keep it light then the entire barrel recoiling may not be feasible.
Maybe some kind of hydraulic system triggered by the shot?
  • 0


Cthulhu
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Wed Apr 12, 2017 7:07 pm
Location: South Texas
Country: United States (us)
Reputation: 9

Re: Short question topic

Unread postAuthor: jackssmirkingrevenge » Wed Dec 20, 2017 9:37 am

Hm, but if I need to keep it light then the entire barrel recoiling may not be feasible.


Why not? You're good with PVC and a large enough chamber and heavy projectile is definitely going to give you a good kick.
  • 0

hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 25002
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 124

Re: Short question topic

Unread postAuthor: hectmarr » Sat Dec 23, 2017 5:27 pm

Happy holidays for this whole community and especially for friend Jack, who talks with me about these issues. My best wishes for a nice Christmas for everyone. :)

P.D.
I'm firing all my guns, as much as I can, because among the pyrotechnics I can camouflage myself very well !! :bounce: :bounce: :bounce: :bounce:
  • 0

Attachments
Feliz boom navidad !!.jpg
There is a more powerful driving force than steam,
electricity and atomic energy: the will
User avatar
hectmarr
Captain
Captain
 
Posts: 342
Joined: Sat May 07, 2016 3:49 pm
Country: Argentina (ar)
Reputation: 52

Re: Short question topic

Unread postAuthor: jackssmirkingrevenge » Sat Dec 23, 2017 7:35 pm

All the best to you too and your family, as well as the rest of the board members old and new!

Also we did the same thing with the Christmas lights last year too :D

xmasshotgun.jpg
  • 0

hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 25002
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 124

Re: Short question topic

Unread postAuthor: Air2theBrain » Sun Dec 24, 2017 3:43 am

Nice xmas lights guys.
To the active members here all the best for 2018....even all you introverted lurkers...
  • 0


Air2theBrain
2nd Lieutenant
2nd Lieutenant
 
Posts: 222
Joined: Wed Apr 12, 2017 5:30 am
Country: Canada (ca)
Reputation: 12

Re: Short question topic

Unread postAuthor: Cthulhu » Tue Dec 26, 2017 7:16 am

Quick question regarding pumps:
Has anyone found a pump that works by rotating a crank rather than the regular up-and-down piston that are so common?
A friend of mine built a little sheet metal "tank" and wanted me to build a pneumatic cannon for it, but the tight quarters inside make using a pump difficult and bringing a compressor impossible.
  • 0


Cthulhu
Sergeant First Class
Sergeant First Class
 
Posts: 133
Joined: Wed Apr 12, 2017 7:07 pm
Location: South Texas
Country: United States (us)
Reputation: 9

PreviousNext

Return to General Spud Cannon Related

Who is online

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

cron
Reputation System ©'