New Co-Ax Design

[Gun Freak]

Heres a design i came up with today... what do you guys think? much more simple and cheap than my last piston valve design. i plan to up the measurements to:
Barrel- 3/4"
Chamber- 1 1/2"

[twizi]

the nail is going to be a problem by leaking

[MrCrowley]

...unless it is epoxied, but the nail is quite unnecessary. Just make a proper barrel support.

[spudtyrrant]

Just make a proper barrel support.

i think its functions more as an ammo stop, even so you could just put it through the barrel instead of the entire assembly

[Gun Freak]

yes it was originally an ammo stop then a barrel support... but im not using it in the build. i'm too worried about leakage and i dont wanna buy epoxy. i'll just put a little pice of wood under the barrel or something... unless you guys have any suggestions? other than that its pretty good right?

[jeepkahn]

yes it was originally an ammo stop then a barrel support... but im not using it in the build. i'm too worried about leakage and i dont wanna buy epoxy. i'll just put a little pice of wood under the barrel or something... unless you guys have any suggestions? other than that its pretty good right?

Do a search for barrel supports, I believe Hubb has some in his library...

here's one of mine...

[Gun Freak]

oh thats cool. you just took out the spacing between the spoke things?

[SP00K]

Could you explain how the piston system works?

Sorry, I haven't ever considered piston systems as an option before. But now that I've seen the simplicity of your design, I'm kind of intrigued in them. A whole new world of options has been set.

[MrCrowley]

Could you explain how the piston system works?

Sorry, I haven't ever considered piston systems as an option before. But now that I've seen the simplicity of your design, I'm kind of intrigued in them. A whole new world of options has been set.

You would've found this if you bothered to check the SpudWiki for Piston Valves or this Pneumatic Cannon Showcase section for How-To's or such, instead you were lazy and hijacked a thread.

Now since I had a go at you for not bothering to search, i'm going to spoonfeed you:
http://www.spudfiles.com/forums/piston- ... t8157.html

You're welcome.

[Marffy]

it looks great. the only thing i dont like about it (and all coxials) is loading the gun. you either have to take out the back end of the gun or jam the ammo down with a ramrod. Or if you use marbles or nails those usually slide down the barrel. you try using a nail dart of some sort. I'm no coaxial expert but i would upgrade to a bigger pilot or i'd mod the blow-gun.

[MrCrowley]

Marffy may be no coaxial expert but he is certainly right, I would upgrade the blow valve. Even if the piston was sealed with o-rings, a blowgun only decreases performance. Use a ball valve or sprinkler valve and you will definitely get better performance. I would doubt your piston will even actuate with a pilot volume that big and using a blowgun.

[Gun Freak]

ok i'll switch it to a ball valve if i make it. as of now i'm going with my first design... the T piston. 8)

[Marffy]

Marffy may be no coaxial expert but he is certainly right, I would upgrade the blow valve. Even if the piston was sealed with o-rings, a blowgun only decreases performance. Use a ball valve or sprinkler valve and you will definitely get better performance. I would doubt your piston will even actuate with a pilot volume that big and using a blowgun.

thanks. i'll take that as a compliment

[MrCrowley]

Marffy may be no coaxial expert but he is certainly right, I would upgrade the blow valve. Even if the piston was sealed with o-rings, a blowgun only decreases performance. Use a ball valve or sprinkler valve and you will definitely get better performance. I would doubt your piston will even actuate with a pilot volume that big and using a blowgun.

thanks. i'll take that as a compliment

You said it yourself, you know yourself better than I know you

[Gun Freak]

is it worth buying a sprinkler valve and a blow gun to mod it, or is the performance of a ball valve even close?