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 69 users online :: 6 registered, 0 hidden and 63 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

What's your Holy Grail of Spudguns?

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

Unread postAuthor: Hotwired » Tue Jan 01, 2008 3:25 pm

No worries, I get five or six shots that punch through a cardboard box at 20m from my cannon like that.

Incidentally. My current grail is a semi automatic inline cylindrical ammo feed from behind the barrel.

Not into the side of the barrel. Through the back :)
  • 0

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

Unread postAuthor: iknowmy3tables » Tue Jan 01, 2008 3:53 pm

elitesniper wrote:a golf ball bbmg :lol: haha if possible

well I guess the way some people build gb cannons meant for short burst of golfballs like the Vogt design
its sorta like a very small ammo capacity gbmg too small for my satisfaction only one burst

Joel made a sort of ping pong cloud powered by a vacuum
http://spudtech.com/content.asp?id=10
third gun from the bottom

maybe a high pressure scuba tank with an accumulation chamber will get you enough air for that
  • 0


iknowmy3tables
Major General
Major General
 
Posts: 1558
Joined: Fri Dec 15, 2006 3:57 pm
Location: maryland
Country: United States (us)
Reputation: 0

Unread postAuthor: rna_duelers » Tue Jan 01, 2008 8:13 pm

Supersonic Golfball Hybrid.
  • 0

Image
User avatar
rna_duelers
Major General
Major General
 
Posts: 1740
Joined: Mon Sep 26, 2005 7:07 am
Location: G-land Australia
Country: Australia (au)
Reputation: 1

Unread postAuthor: SPG » Wed Jan 02, 2008 7:53 am

Hotwired wrote:Incidentally. My current grail is a semi automatic inline cylindrical ammo feed from behind the barrel.

Not into the side of the barrel. Through the back :)


What capacity are you hoping for in your magazine, if it's quite low that should be really easy.
  • 0

User avatar
SPG
Major
Major
 
Posts: 364
Joined: Thu Feb 09, 2006 11:55 am
Reputation: 0

Unread postAuthor: Hotwired » Wed Jan 02, 2008 7:55 am

Fairly low, 3-5 would be fine.
  • 0

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

Unread postAuthor: jackssmirkingrevenge » Wed Jan 02, 2008 8:02 am

I would definitely like to see a semi/full auto design that can eject cartridges, the latter premise is purely for the "cool" fasctor but after all, that's what spudguns are all about.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: SPG » Wed Jan 02, 2008 8:07 am

Hotwired wrote:Fairly low, 3-5 would be fine.


Constant air source, or on-board precharged? And what calibre?
  • 0

User avatar
SPG
Major
Major
 
Posts: 364
Joined: Thu Feb 09, 2006 11:55 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: octane89 » Wed Jan 02, 2008 8:35 am

Hotwired wrote:Incidentally. My current grail is a semi automatic inline cylindrical ammo feed from behind the barrel.

Not into the side of the barrel. Through the back :)


I was looking at this and think it can be converted for spudgun use.
http://science.howstuffworks.com/machine-gun7.htm

There are other systems they show like the "recoil" system which may effective too.
  • 0

"Only after disaster can we be resurrected."
Go Listen to My Friends...The Devil Wears Prada
User avatar
octane89
1st Lieutenant
1st Lieutenant
 
Posts: 257
Joined: Tue Sep 11, 2007 1:20 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Jan 02, 2008 8:47 am

octane89 wrote:I was looking at this and think it can be converted for spudgun use.

gas system


That system has often been proposed but I doubt it would work for spudguns, purely befecause of the pressures involved. Firearms that use this system are typically rifles (with some exceptions like the Desert Eagle) operating with chamber pressures of 30-50,000 psi, meaning there's more than enough power to spare to operate it.

For lower pressures typically generated by pistol cartridges, the direct blowback system is preferred, which makes more sense for spudguns.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: POLAND_SPUD » Wed Jan 02, 2008 9:24 am

JSR we all know what is your holy grail.... a spudgun made only out of epoxy and firing epoxy projectiles, possibly using epoxy instead of air :D
  • 0

User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: jackssmirkingrevenge » Wed Jan 02, 2008 9:30 am

How about using the exothermic reaction of curing epoxy could heat up the air in a chamber to generate enough pressure to fire a projectile :D
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: judgment_arms » Wed Jan 02, 2008 9:46 am

jackssmirkingrevenge wrote:I would definitely like to see a semi/full auto design that can eject cartridges, the latter premise is purely for the "cool" fasctor but after all, that's what spudguns are all about.


I’m working on it, Jack.

As for operating systems, I don’t like pure-blowback; sacrifices way to much power. I’ve bean leaning towards recoil, or my gas-assisted recoil idea.
All I need is some time, money, and a good size chunk of 2.5” SCH40 PVC and I’d build a prototype.
  • 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: Hotwired » Wed Jan 02, 2008 10:00 am

@SPG: unknown and unknown but you can take it as a given that it's not for firing pellet sized ammo.

@octane89: I'm very loathe to snaffle projectile propulsion power to recock a mechanism.
  • 0

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

Unread postAuthor: POLAND_SPUD » Wed Jan 02, 2008 10:09 am

cartridges would allow to use different types of ammo in semi/fullauto guns...
for example marbles, flechettes, potatoes in the same gun etc.
so I wouldn't say that ejecting cartridges would be only for 'cool' effect, since 'spent cartridges' would have to be removed somehow to allow semi/or full auto fire
  • 0

User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: SPG » Wed Jan 02, 2008 10:13 am

Hotwired wrote:@SPG: unknown and unknown but you can take it as a given that it's not for firing pellet sized ammo.


Yeah I just knew you'd say that, but assuming it's not for pumpkins this might just work.

We'll start with the combined barrel/magazine. This is going to just be an extra long barrel, with an end cap on one end and a "hop-up" somewhere along it's length (say 6 or 7 cylindrical ammos worth along). and some ports about 1 ammo length back from this towards the end cap.

Now the chamber, imagine a co-axial gun, but the barrel runs right through.

Now the action. Like a co-ax it relies on a piston moving. But unlike a normal co-ax the piston slides back and forth along the barrel exposing or covering the port.

Voila....
  • 0

User avatar
SPG
Major
Major
 
Posts: 364
Joined: Thu Feb 09, 2006 11:55 am
Reputation: 0

PreviousNext

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'