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Superfast valve idea

Unread postPosted: Wed Dec 26, 2007 11:23 am
Author: Gunner
Just came my mind, and I think that valve could be pretty fast if it works.[/img]

Unread postPosted: Wed Dec 26, 2007 11:26 am
Author: jackssmirkingrevenge
Basically a piston valve where the pneumatic pilot is replaced by a mechanical latch, it should work brilliantly if you can make the latch strong enough. I made something similar (but in coaxial form) with this launcher.

Image

Unread postPosted: Wed Dec 26, 2007 11:27 am
Author: Hotwired
Probably would be. Problem is it's focusing a large piston face of pressure on a small sear. Bit like a springer air gun.

If you can machine up a good sear mechanism it'd work :)

Unread postPosted: Wed Dec 26, 2007 11:32 am
Author: jackssmirkingrevenge
Hotwired wrote:Probably would be. Problem is it's focusing a large piston face of pressure on a small sear. Bit like a springer air gun.


Good analogy, I had made my components out of metal reinforced epoxy (what else :roll: :D ) and they served me well, but the piston was less than 3/4" diameter - for larger launchers I would stick to a conventionally piloted piston, and concentrate of having a small pilot volume and high flow pilot to get good performance.

Unread postPosted: Wed Dec 26, 2007 12:02 pm
Author: iknowmy3tables
its been done before, I've been thinking about doing this for awhile because I like the speed

how might you plug one of these into ggdt, do you think maybe a pilot equal to the piston diameter

Unread postPosted: Wed Dec 26, 2007 12:09 pm
Author: Hawkeye
The trigger is basically just a flush handle for a urinal. You can probably buy one.

Unread postPosted: Wed Dec 26, 2007 6:23 pm
Author: iknowmy3tables
Hawkeye wrote:The trigger is basically just a flush handle for a urinal. You can probably buy one.

:? the actual trigger or the release mechanism, I don't think anyone would have trouble making a handle but a flush handle and the release mechanism are completely different, a flush handle is just a lever the sides on the inside and outside of the toilet tank, to pull a the flapper I find nothing useful in a flash handle for this

Unread postPosted: Wed Dec 26, 2007 6:54 pm
Author: Hawkeye
Not a flush handle from a toilet, a flush handle from a urinal. They do function similar to the diagram, only holding back water instead of air.

Unread postPosted: Wed Dec 26, 2007 8:13 pm
Author: mark.f
Another idea is to use some sort of ball-bearing release mechanism around the circumference of the piston. Allows more distribution of the force on the piston, as well as being easy to actuate as well with a simple lock collar.

Unread postPosted: Wed Dec 26, 2007 10:00 pm
Author: jackssmirkingrevenge
markfh11q wrote:Another idea is to use some sort of ball-bearing release mechanism around the circumference of the piston.


*cue link to clide's mini-pump*

but I can't be bothered, it's the holidays and I'm sick at home :? :D

Unread postPosted: Wed Dec 26, 2007 11:38 pm
Author: mark.f
I got it.

Long link.

I, too, am tired. See you guys tomorrow.

Unread postPosted: Fri Dec 28, 2007 3:53 pm
Author: iknowmy3tables
markfh11q wrote:Another idea is to use some sort of ball-bearing release mechanism around the circumference of the piston. Allows more distribution of the force on the piston, as well as being easy to actuate as well with a simple lock collar.

just like a quick conect eh?
this suddenly reminds me of an old idea
edit: how about this
Image

Unread postPosted: Fri Dec 28, 2007 6:16 pm
Author: jackssmirkingrevenge
if you could make it, looks good :)

Unread postPosted: Mon Dec 31, 2007 1:25 pm
Author: Carlman
hmm looks complicated lol, could make for a fast bb gun...