hey guys, pyro and I are going to build a 4 inch coaxial with a 2inch barrel later on today. what kind of performance do you think we are going to be getting? with a cauk tube.
thanks i cant use ggt or whatever its called.
4inch coax predictions?
-
jackssmirkingrevenge
- Five Star General
- Posts: 26183
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 547 times
- Been thanked: 326 times
if you can give us the full dimensions, pressure you intend to use and weight of the caulk tube i'm sure we can give you an idea.
Why can't you use GGDT? You should try, it's a real gem of a program and saves you a lot of trial and error playing with variables before you start building.
Why can't you use GGDT? You should try, it's a real gem of a program and saves you a lot of trial and error playing with variables before you start building.
hectmarr wrote:You have to make many weapons, because this field is long and short life
-
jackssmirkingrevenge
- Five Star General
- Posts: 26183
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 547 times
- Been thanked: 326 times
here's a rough estimate with a 100 gram projectile
- Attachments
-
- Animation2.gif (21.62 KiB) Viewed 2799 times
hectmarr wrote:You have to make many weapons, because this field is long and short life
-
jackssmirkingrevenge
- Five Star General
- Posts: 26183
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 547 times
- Been thanked: 326 times
Interesting to note that that predicted muzzle energy is roughly twice that of a 9mm pistol round 
hectmarr wrote:You have to make many weapons, because this field is long and short life
-
rna_duelers
- Staff Sergeant 3
- Posts: 1739
- Joined: Mon Sep 26, 2005 7:07 am
- Location: G-land Australia
Twice the muzzle energy as a 9mm pistol round...wow...
What are you going to make the piston out of?Try and make it light as possible.The love for big coaxial never ends,how much is this project costing?
What are you going to make the piston out of?Try and make it light as possible.The love for big coaxial never ends,how much is this project costing?
-
jackssmirkingrevenge
- Five Star General
- Posts: 26183
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 547 times
- Been thanked: 326 times
It gets better, with a 2 inch steel ball as ammunition, the energy is about 100 ft/lbs greater than a 0.44 magnum roundrna_duelers wrote:Twice the muzzle energy as a 9mm pistol round...wow...
hectmarr wrote:You have to make many weapons, because this field is long and short life
HOLY WOW! i think this one might have to live down at pyros farm....jackssmirkingrevenge wrote:It gets better, with a 2 inch steel ball as ammunition, the energy is about 100 ft/lbs greater than a 0.44 magnum roundrna_duelers wrote:Twice the muzzle energy as a 9mm pistol round...wow...
-
turbohacker
- Specialist 3
- Posts: 392
- Joined: Wed Dec 20, 2006 12:34 am
It works great!!!
I reccomend using a slightly filed 3"cap as your piston as seen on my gun.
I reccomend using a slightly filed 3"cap as your piston as seen on my gun.
- Attachments
-
-
<-- This is not a cat avatar
If it walks like a dog, sratches like a dog, and barks like a dog, than its probobly a...-TURTLE, it's a TURTLE!!! Cant you see?!!!
If it walks like a dog, sratches like a dog, and barks like a dog, than its probobly a...-TURTLE, it's a TURTLE!!! Cant you see?!!!
frankrede wrote:Great googlay mooglay!
Thats a beast!
turbo, i just checked out your coaxial. I love the flanges ( or whatever they are called) how long did the sanded cap take? I only have a drill and a dremmle
edit: to avoid confusion, I meant pyromaniac not pyro. too many pyro names....
edit edit: sorry didnt see your pics. thought you meant the green gun
edit: to avoid confusion, I meant pyromaniac not pyro. too many pyro names....
edit edit: sorry didnt see your pics. thought you meant the green gun
-
turbohacker
- Specialist 3
- Posts: 392
- Joined: Wed Dec 20, 2006 12:34 am
Yeah, i just drilled the hole for the bolt dead center and mounted it in my drill press. I then ground and fit a few times with an angle grinder with a flapper wheel. A drill mounted in a vise would probobly work just as well...
<-- This is not a cat avatar
If it walks like a dog, sratches like a dog, and barks like a dog, than its probobly a...-TURTLE, it's a TURTLE!!! Cant you see?!!!
If it walks like a dog, sratches like a dog, and barks like a dog, than its probobly a...-TURTLE, it's a TURTLE!!! Cant you see?!!!
frankrede wrote:Great googlay mooglay!
Thats a beast!
-
rna_duelers
- Staff Sergeant 3
- Posts: 1739
- Joined: Mon Sep 26, 2005 7:07 am
- Location: G-land Australia
Ahh yes an 3"endcap,fill it with space filling foam or similar to reduce the pilot volume.Haha I wouldn't shoot something like that in town or a city thats a little crazy and could see something bad happening..
@jackssmirk-A .44 magnum,thats getting out of hand!You gave me links to a website with caluclators to find the muzzle energy of projectile and I can't seem to find them.If you could be as good to post the link that would great.Wanting to find the energy of some of my pneumatics
.
@jackssmirk-A .44 magnum,thats getting out of hand!You gave me links to a website with caluclators to find the muzzle energy of projectile and I can't seem to find them.If you could be as good to post the link that would great.Wanting to find the energy of some of my pneumatics
.