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| Gunner |
 Posted: 12/26/2007 11:23 AM Post subject: Superfast valve idea |
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Sergeant
Joined: 21 Oct 2007
Posts: 96
149.12 Spud Bux
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Just came my mind, and I think that valve could be pretty fast if it works.[/img]
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| jackssmirkingrevenge |
| Posted: 12/26/2007 11:26 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6480
9865.25 Spud Bux
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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.
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| Hotwired |
| Posted: 12/26/2007 11:27 AM Post subject: |
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UK Spudgunner
Joined: 13 Oct 2006
Posts: 1675
3527.03 Spud Bux
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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 
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| jackssmirkingrevenge |
| Posted: 12/26/2007 11:32 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6480
9865.25 Spud Bux
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| 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   ) 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.
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| iknowmy3tables |
| Posted: 12/26/2007 12:02 PM Post subject: |
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Brigadier General
Joined: 15 Dec 2006
Posts: 1122
2642.13 Spud Bux
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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
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| Hawkeye |
| Posted: 12/26/2007 12:09 PM Post subject: |
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Major
Joined: 21 Jan 2007
Posts: 357
994.02 Spud Bux
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| The trigger is basically just a flush handle for a urinal. You can probably buy one.
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| iknowmy3tables |
| Posted: 12/26/2007 18:23 PM Post subject: |
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Brigadier General
Joined: 15 Dec 2006
Posts: 1122
2642.13 Spud Bux
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| 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
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| Hawkeye |
| Posted: 12/26/2007 18:54 PM Post subject: |
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Major
Joined: 21 Jan 2007
Posts: 357
994.02 Spud Bux
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| 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.
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| markfh11q |
| Posted: 12/26/2007 20:13 PM Post subject: |
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Donating Member
Joined: 06 May 2006
Posts: 1381
1455.26 Spud Bux
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| 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.
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| jackssmirkingrevenge |
| Posted: 12/26/2007 22:00 PM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6480
9865.25 Spud Bux
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| 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
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| markfh11q |
| Posted: 12/26/2007 23:38 PM Post subject: |
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Donating Member
Joined: 06 May 2006
Posts: 1381
1455.26 Spud Bux
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I got it.
Long link.
I, too, am tired. See you guys tomorrow.
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| iknowmy3tables |
| Posted: 12/28/2007 15:53 PM Post subject: |
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Brigadier General
Joined: 15 Dec 2006
Posts: 1122
2642.13 Spud Bux
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| 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
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| jackssmirkingrevenge |
| Posted: 12/28/2007 18:16 PM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6480
9865.25 Spud Bux
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| if you could make it, looks good
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| Carlman |
| Posted: 12/31/2007 13:25 PM Post subject: |
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The Aussie
Joined: 24 Nov 2007
Posts: 1103
278.07 Spud Bux
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| hmm looks complicated lol, could make for a fast bb gun...
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