Posted: Tue Jul 20, 2010 3:36 pm
Mine started to leak at 300 PSI. It was the second type.
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Auto .22 Airgun using JSM's Poppet Valve (Will it work?)
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Posted: Tue Jul 20, 2010 6:10 pm
Hmm, i guess i will just have to take my chances and hope I get a decent one :/
Posted: Tue Jul 20, 2010 6:15 pm
You could always use a ball valve as a trigger - good for at least 800 psi, and a perfectly feasible alternative to feed a pop-off valve. Also by limiting its maximum travel you could also regulate rate of fire.
My planned design for this valve used a ball valve:
My planned design for this valve used a ball valve:
Posted: Tue Jul 20, 2010 6:34 pm
Hmm, could do... Will give it a think!
Posted: Wed Jul 21, 2010 11:08 am
Re-designed it... Please give opinions
Posted: Wed Jul 21, 2010 11:17 am
Approved 
can't see anything that would discourage it from working.
can't see anything that would discourage it from working.Posted: Wed Jul 21, 2010 12:32 pm
Hmm, the problem is, with a 24" barrel that makes the gun from stock to end about 4' :O
I might be able to shave 1' off by making an adjustment though, what is recomended
I might be able to shave 1' off by making an adjustment though, what is recomended
Posted: Wed Jul 21, 2010 12:42 pm
Just switch things round a little, look how compact my design above is.killerbanjo wrote:I might be able to shave 1' off by making an adjustment though, what is recomended
Posted: Wed Jul 21, 2010 12:46 pm
What do you think the shortest, but effective barrel would be?
EDIT:
Oh and one more thing, does anyone have any dimentions for common HPA paintball tanks, such and your Ninja JSR?
EDIT:
Oh and one more thing, does anyone have any dimentions for common HPA paintball tanks, such and your Ninja JSR?
Posted: Wed Jul 21, 2010 1:01 pm
Download GGDT and play around with barre lengths and pressures, that should give you a better idea.
Posted: Wed Jul 21, 2010 1:19 pm
Not that easy to model pop-off valve performance.Gun Freak wrote:Download GGDT and play around with barre lengths and pressures, that should give you a better idea.
you could probably get away with 12-16 inches and still have respectable power (say 4-6 ft/lbs), and upping the pressure can compensate for a shorter barrel though of course you get less shots per fill.What do you think the shortest, but effective barrel would be?
My 13 and 48 cubic inch tanks are approximately 22cm length/5cm diameter and 24cm length/9cm diameter respectively.does anyone have any dimentions for common HPA paintball tanks, such and your Ninja JSR?
Posted: Wed Jul 21, 2010 3:37 pm
Yet another update... awaiting JSR's opinion!
Posted: Wed Jul 21, 2010 3:48 pm
Make more sense like that, same features but in a much more compact package
What sort of construction are you planning to use?
Posted: Wed Jul 21, 2010 3:54 pm
What do you mean? As in what materials?
Posted: Wed Jul 21, 2010 3:59 pm
Yes, will it be the same extensive use of epoxy I tend to go for?