hybrid cartridge protoype without burst disk
I see what you're saying Crna, but sealing it would be a problem, good thought though. I presume you mean having it similar to a drill chuck inside the cartridge?
Also JSR, what CAD program are you going for? I've got a free package downloading now, and I'll be trying to get a copy of Solidworks.
Also JSR, what CAD program are you going for? I've got a free package downloading now, and I'll be trying to get a copy of Solidworks.
/sarcasm, /hyperbole
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The o-ring setup I already have allows similar adjustment, moar compression = more pressure retention (for example one of the o-rings I tried starts out at 6mm ID, but compressing it enabled it to hold a 5.5mm projectile).Heimo wrote:tightening the screw cap compresses the rubber tube, this will make the burst pressure adjustable...
It's too difficult get right though - a fraction of a turn is enough to make the difference between not being able to contain 100psi of pre ignition pressure, and not releasing over 2000 psi of combustion pressure.
Maybe I need to find a shallower thread, hmmm...
I'm currently inclining towards a (legal 0_o) copy Solidworks, in conjunction with a joint venture that's on the horizon, more on that (much) later.Zeus wrote:Also JSR, what CAD program are you going for? I've got a free package downloading now, and I'll be trying to get a copy of Solidworks.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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ill draw it up real quick didn't have time before
edit: something like this
edit: something like this
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- collet.JPG (39.3 KiB) Viewed 3186 times
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You're still left with the problem of sealing though, unless your collet is a length of silicone tubing...
hectmarr wrote:You have to make many weapons, because this field is long and short life
jsr instead of trying to guess at the proper tightness. Why not use a feeler guage to measure between the detent cap and cartridge? It might take a while but if you change the amount the cap is screwed in by a small amount then test. You should be able to maintain a pretty good firing probability if the cap and cartridge gap is always set the same.
do that then make a spacer so all you have to do is torque the detent capmyinisjap wrote:jsr instead of trying to guess at the proper tightness. Why not use a feeler guage to measure between the detent cap and cartridge? It might take a while but if you change the amount the cap is screwed in by a small amount then test. You should be able to maintain a pretty good firing probability if the cap and cartridge gap is always set the same.
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In an effort to make a quick and easy cartridge, trying out a simple diaphragm valve built as per the diagram below, prototype curing as we speak.
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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You may need to add a spring. But all the same, who knows until you try right?
Still not working out eh ?I'm currently inclining towards a (legal 0_o) copy Solidworks, in conjunction with a joint venture that's on the horizon, more on that (much) later.
How does the air get behind the diaphragm in the first place ?
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Haven't tried yetal-xg wrote:Still not working out eh ?
see attached, in practice it will be filled through the "barrel" but should still work.How does the air get behind the diaphragm in the first place ?
hectmarr wrote:You have to make many weapons, because this field is long and short life
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I don't get the diagram.
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One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
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Sounds like it in theory but I gave it a quick test at 50 psi and it held pressureal-xg wrote:Well filling from behind makes sense, but surely filling through the barrel will just flex the diaphragm back and it will prevent any air from getting behind it to equalize?
The spudfiles uploader has a problem with animated gifs, if you click in it to open in another window it shows up correctly.A bit of a .gif fail there
hectmarr wrote:You have to make many weapons, because this field is long and short life