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 35 users online :: 4 registered, 0 hidden and 31 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Coin Gun?

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Unread postAuthor: jrrdw » Fri Sep 28, 2007 7:13 am

For the barrel, you could use 2 aluminum bars with 1 side each having a machined grove, then bolt them together. As for spin, a tiny notch filed in the edge will make it spin as soon as it catchs free air. Dimes would be deadly ammo! Small, light weight, hard metal.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6539
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: Redcoat » Fri Sep 28, 2007 7:22 am

It's a good idea mitchza, Making it semi auto would be awesome.
I think I may start just doodling this idea on post-it notes.
  • 0

Poo.
User avatar
Redcoat
Brigadier General
Brigadier General
 
Posts: 836
Joined: Tue Feb 13, 2007 1:07 am
Location: Sydney ,Australia
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Fri Sep 28, 2007 7:34 am

Seriously guys - fork out $20 for a pneumatic nailgun off e-bay and you have a powerful semi-automatic launcher ready made that just needs a rail built to hold the coins.
  • 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: Novacastrian » Fri Sep 28, 2007 7:55 am

jrrdw wrote:For the barrel, you could use 2 aluminum bars with 1 side each having a machined grove, then bolt them together. As for spin, a tiny notch filed in the edge will make it spin as soon as it catchs free air. Dimes would be deadly ammo! Small, light weight, hard metal.


That is exactly how i would make the barrel. Except replace the machined groove with a machined teflon insert that fits inside you pre-machined barrel.
You would have to use dowels to locate each half though- i agree with JSR though- the pressure required would be hardly worth the effort (for me at least). You WOULD have to make it auto too- flying discs are notorious bad flyers!
But with 4 a second comin' at ya, watch out!!
  • 0


Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: TechnoMancer » Fri Sep 28, 2007 7:59 am

probably.
but the US navy and military are experimenting with railguns!!!

the railgun is far more powerful than the coilgun because the lorenz forces are stronger than the attraction caused by the induced magnetic field in the projectile of a coilgun.
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: Novacastrian » Fri Sep 28, 2007 8:17 am

TechnoMancer wrote:probably.
but the US navy and military are experimenting with railguns!!!

the railgun is far more powerful than the coilgun because the lorenz forces are stronger than the attraction caused by the induced magnetic field in the projectile of a coilgun.


In which way is that connected to shooting coins? :idea: :newb:
  • 0


Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: williamfeldmann » Fri Sep 28, 2007 8:19 am

Yeah, my bad on the rail gun statement, I was just so excited to be typing I was losing control.... not really.

I meant a coil gun working on magnetism.

A rail gun would work in this instance, but, as was mentioned, I don't think any of us have a money tree in our back yard, except possbily Jackssmirkingrevenge, and its a euro-tree :(

The nail gun would work well, the spinning "tire" gun would work as well.
I can't see how either would work against the spinning effect the coin would have, though, for any real accuracy. However, both designs would work well with other shapped ammo, too, as long as the mass of the ammo was small enough. For instance wood dowel slugs would be light weight enough, could be made in standard sizes, stack loaded into a magazine of some sort, and fed into an automatic nailer, or a spinning tire, and fired through a round (=cheap and easily had) barrel.
  • 0

User avatar
williamfeldmann
2nd Lieutenant
2nd Lieutenant
 
Posts: 216
Joined: Sun Sep 09, 2007 6:55 pm
Location: Ames. Iowa, middle of BFE
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: jackssmirkingrevenge » Fri Sep 28, 2007 8:25 am

Actually, I'll practice what I preach - I have an unused nailgun at home, an ashtray full of coins and a massive 110 psi compressor at work - I think I know what I'll be doing over the weekend :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: Novacastrian » Fri Sep 28, 2007 8:41 am

An "ashtray full of coins" ??? I can smell tax free cigarettes :P
  • 0


Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Fri Sep 28, 2007 9:03 am

I can't smoke in the office, I have to use the ashtray for something hehe
  • 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: jackssmirkingrevenge » Fri Sep 28, 2007 11:31 am

As promised, I've done some work on the subject - excuse the ghetto lego setup, I just wanted to evaluate the power potential. I wasn't disappointed, at a few inches range it drove a coin through about 1cm worth of corrugated cardboard :D Friday night's a little busy but I'll do some proper work over the weekend, watch this space.
  • 0

Attachments
DSCF1062.JPG
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: jimmy101 » Fri Sep 28, 2007 11:51 am

Pretty cool jack.

I wouldn't call Legos "ghetto", they are a "prefabricated cunstruction system". Imagine what you could do if you could get metal Legos!

Heck, even with stock legos you can make things stronger than wood. With a little effort you can make'm as strong as steel, though the construction would be bigger with the stock Legos than it would be with steel.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3129
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: jackssmirkingrevenge » Fri Sep 28, 2007 1:03 pm

Looks like there'll be a lot of lego in the final design, great stuff and the only childhood toy I kept because it's so bloody useful.

Even used drilled out lego blocks as silencer baffle separators once :D worked a treat
  • 0

Attachments
skifSDunpainted.JPG
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: TechnoMancer » Fri Sep 28, 2007 8:41 pm

railguns dont cost that much to build if you can find enough junk capacitors to provide the power.
  • 0


TechnoMancer
Corporal
Corporal
 
Posts: 64
Joined: Mon Jul 02, 2007 4:58 am
Location: Christchurch New Zealand
Reputation: 0

Unread postAuthor: Novacastrian » Fri Sep 28, 2007 9:13 pm

You are truly the "gun" JSR, you never fail to suprise me :D
  • 0

America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

PreviousNext

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'