3/4inch anti tank (unfinished)

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
User avatar
Imortal87
Private 4
Private 4
Posts: 71
Joined: Sat Nov 10, 2007 10:59 pm

Wed Dec 10, 2008 10:18 am

This is the design I have been working on for a few days now that is based off of the barret .50 cal. It is a bolt action, single shot for the moment, but I am experimenting with a shell extractor and clip feed system for it. it fires using a CO2 inflator as a power sourse and uses empty 12 guage shotgun shells for ammo. it should be quite effective once it is fully operational. I built it origanaly as an airsoft anti tank/vehicle gun to shoot flour and paint rounds but it has so much potential in my eyes that I know I will end up firing any thing that will fit well in an old shotgun shell. :twisted:

Image
Image
Image
Image
Image
Image
Image
Image
Image
Image
No matter how rich you become, how famous or powerful, when you die the size of your funeral will still pretty much depend on the weather.
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26203
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 569 times
Been thanked: 345 times

Donating Members

Wed Dec 10, 2008 10:28 am

So the inflator fires the projectile directly? It must be quite poor in terms of power for such a relatively large calibre.

Still, your cartridge system is looking good, and an extractor shouldn't be too hard to figure out.
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
Imortal87
Private 4
Private 4
Posts: 71
Joined: Sat Nov 10, 2007 10:59 pm

Wed Dec 10, 2008 10:34 am

unfortunatly I dont have any more C02 cartrages so I dont really know how it fires just yet :(

the tricky part of the extractor is getting it to fit right with all of the other moving parts and still extract the shell every time.
No matter how rich you become, how famous or powerful, when you die the size of your funeral will still pretty much depend on the weather.
User avatar
starman
Sergeant Major
Sergeant Major
United States of America
Posts: 3027
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC

Donating Members

Wed Dec 10, 2008 10:35 am

Nice work!! I like your breech load detail. I think a paint job is in order here.... :wink:
User avatar
Imortal87
Private 4
Private 4
Posts: 71
Joined: Sat Nov 10, 2007 10:59 pm

Wed Dec 10, 2008 10:40 am

starman wrote:Nice work!! I like your breech load detail. I think a paint job is in order here.... :wink:
all in good time sir, all in good time. it still needs to have a barrel re-fit and the muzzle break is a bit off center so I wont be painting just yet.
No matter how rich you become, how famous or powerful, when you die the size of your funeral will still pretty much depend on the weather.
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26203
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 569 times
Been thanked: 345 times

Donating Members

Wed Dec 10, 2008 10:51 am

Imortal87 wrote:the muzzle break
Brake, it's mean to arrest the gun's recoil, not destroy it ;)

Since you have a hollow bolt, all the ejector needs to be is some sort of projection opposite the ejection port which strikes the base of the cartridge and tips it out. As to the extractor, a small claw on a flexible mount that grabs the rim is all you need. It will be fiddly, but definitely doable.
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
Imortal87
Private 4
Private 4
Posts: 71
Joined: Sat Nov 10, 2007 10:59 pm

Wed Dec 10, 2008 10:59 am

right thanks for the grammer corection spelling and typing arent what you could call my strong pionts. :oops:

and correct on the extractor as well, I have a prototype it just dosent work as well as it should it theory.
No matter how rich you become, how famous or powerful, when you die the size of your funeral will still pretty much depend on the weather.
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26203
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 569 times
Been thanked: 345 times

Donating Members

Wed Dec 10, 2008 11:11 am

If it's any help, the ejector on my cartridge loaded prototype was simply a tube cut at an angle, and with my combustion cartridge was just a bolt jutting out.

The advantage of the cartridge launchers I've made so far though is that they're built on direct blowback principles and therefore don't require an extractor as they propel themselves out of the ejection port.
hectmarr wrote:You have to make many weapons, because this field is long and short life
User avatar
SP00K
Specialist 2
Specialist 2
Posts: 212
Joined: Wed Dec 03, 2008 4:20 pm
Location: Ohiya

Wed Dec 10, 2008 3:27 pm

:o Very nyce! I really like the bolt actoin desing have on it. It looks pretty uniform too, there's no parts on it that make it look like an eyesore.
User avatar
psycix
Sergeant Major 4
Sergeant Major 4
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands

Donating Members

Fri Dec 12, 2008 6:48 pm

Good job on the bolt.
But dont ever hope to use it against a tank. :D

Using the CO2 inflator directly? Use a chamber and a valve. Seriously.
Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
Mateo
Private 4
Private 4
Posts: 80
Joined: Sun Oct 21, 2007 8:42 pm

Wed Dec 17, 2008 5:25 pm

i dont think the direct co2 cartridge will make much power. why not try to make a burst disk?
Post Reply