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Push button Fuel Metering

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Push button Fuel Metering

Unread postAuthor: SnowFlox » Tue Jul 03, 2007 2:40 pm

I have this idea for a fuel metering system..

does someone already made something like this ? or is it a new idea ?

Image
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Unread postAuthor: sandman » Tue Jul 03, 2007 3:12 pm

new to me
but it seems like it would be hard to control the speed of flow to get the right amount of fuel
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Unread postAuthor: sjog » Tue Jul 03, 2007 3:40 pm

look up sgort87' s winning gun he used a valve like the one you wasted your time "drawing"
Hey ,your not the only person who does it lots 'o peeps "draw" stuff that has been built or can be bought off the shelf.
How many PSI can your "drawing" hold?
I get it ,you want to build the biggest, fastest gun that shoots 2000 yds and only can spend the money found under the couch cushions! lol
Spend your lunch money and buy the part.
AND look up what you want dont just start a new post
Your idea is good I'm just in a bad mood
HAPPY BIRTHDAY!
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Unread postAuthor: frankrede » Tue Jul 03, 2007 3:45 pm

Sgort has a Push button fill setup using a 3 way solenoid.
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Unread postAuthor: SnowFlox » Tue Jul 03, 2007 3:49 pm

sjog wrote:look up sgort87' s winning gun he used a valve like the one you wasted your time "drawing"
Hey ,your not the only person who does it lots 'o peeps "draw" stuff that has been built or can be bought off the shelf.
How many PSI can your "drawing" hold?
I get it ,you want to build the biggest, fastest gun that shoots 2000 yds and only can spend the money found under the couch cushions! lol
Spend your lunch money and buy the part.
AND look up what you want dont just start a new post
Your idea is good I'm just in a bad mood
HAPPY BIRTHDAY!


whats your problem ?? damn ..... :?
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Unread postAuthor: VH_man » Tue Jul 03, 2007 4:14 pm

yeah... that was a little uncalled for.

it looks like that would work quite well. in fact, VERY well. i like the way you think. the only problem i see is the fact that your meter volume would have to be increased, because in order to be able to resist the 100PSI+ that propane gives off to "push" (in your case more like whack with a hammer) the valve open.

still, try it. just might have to hit it pretty hard to make it work.
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Unread postAuthor: turbohacker » Tue Jul 03, 2007 5:49 pm

Try a Pnumatic ram (get them for $5 here http://surpluscenter.com/sort.asp?UID=2007070317435608&catname=air&keyword=ACSA )

Maybe that will give the nessasary push :D
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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?!!!

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Unread postAuthor: VH_man » Tue Jul 03, 2007 5:58 pm

holy patuters its only 5 bucks for a 1 inch stroke, .25 inch air ram!!!!!!!! WOHOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO

sorry. that makes me happy. im gonna use these things to my advantage. semi-auto marble sniper anyone? hehehehe.
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Unread postAuthor: SnowFlox » Wed Jul 04, 2007 11:42 am

hmmm... diddnt thought about the pressure...

but sgort's system looks wicked !
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Unread postAuthor: boilingleadbath » Wed Jul 04, 2007 3:02 pm

As others have said, the main issue with this setup is that the pressure will make this hard to move.

However, I aided in the design and manufacture of one of these devices a while back. My solution to the problem was to add another disk to the piston, so that the propane would not get behind it and present an unbalanced force.
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Unread postAuthor: iknowmy3tables » Thu Jul 19, 2007 9:37 am

this is alittle dead but I just wanted to say that gort did not use a 3way solidnoid, its a minature control valve with fingertab activation just so people can research the right term because its hard to reaserch pictures
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Unread postAuthor: frankrede » Thu Jul 19, 2007 2:08 pm

ohh, I guess I was wrong.
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Unread postAuthor: Gepard » Thu Jul 19, 2007 2:50 pm

iknowmy3tables wrote:<snip> minature control valve with fingertab activation <snip>


It's a variable rate blow gun IIRC.....

Michael
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Unread postAuthor: Major Woody » Wed Apr 09, 2008 3:05 pm

iknowmy3tables wrote:this is alittle dead but I just wanted to say that gort did not use a 3way solidnoid, its a minature control valve with fingertab activation just so people can research the right term because its hard to reaserch pictures


This is true about it being a valve not a solenoid.
But it is a three way valve and requires only a quick tap to charge the chamber. My gun is a close copy of Sgort's, with a few changes (Mr. Heater reg, sweated copper meter pipe instead of brass, rifled barrel and a flash supressor on the barrel). That little valve works wonderfully and the whole fuel meter weighs a tiny fraction of what your typical meter assembly weighs.
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Unread postAuthor: kenbo0422 » Mon Oct 06, 2008 9:59 am

Forget about the pressure. If you use a tube in place of the dual pistons, you'll get pressure pushing equally in both directions. Just cut two holes in the side of the tube, block the tube so the fuel only occupies the volume that you want, and extend the tube toward the left, as shown in your drawing. The extension will keep a solid wall of tubing to block the fuel inlet side until you move it to the fill position. The pressure pushes on the sides of the tube, so moving the mechanism isn't affected by the pressure working against you.
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