Paintball

[cockerpunk]

Originally Posted by drg

Uh. Is that the PM you speak of? Because the way I read it, he's talking about .682 paint in a .693 (or so) modern barrel, the same ~.010 overbore as in the quote above.

yup

i have some nice and small Xball paint after this big game i was at today, so ill even measure it with my calipers.

better yet, we could even use some reballs, those guys are TINY. even with a .681 we can get a .01 setup going.

[drg]

Originally Posted by cockerpunk

yup

i have some nice and small Xball paint after this big game i was at today, so ill even measure it with my calipers.

better yet, we could even use some reballs, those guys are TINY

Okay. Then I stand by my assertion in post #94, as the PM actually confirms the quoted numbers.

Some might think I'm being pushy or nitpicky, but if I didn't ask you produce that PM, we'd be accepting something completely incorrect as truth.

[HP_Lovecraft]

I've wondered about operating pressure as well.
The original CooperT bolts were all tuned for 800psi operating pressure.

A typical modern regulated gun would run on 400psi. Half the pressure, but twice the volume. That chance in flow characterists would certaintly have an effect on how it spins the paintball, but I don't know how. SLower? Faster?

[brycelarson]

Originally Posted by HP_Lovecraft

I've wondered about operating pressure as well.
The original CooperT bolts were all tuned for 800psi operating pressure.

A typical modern regulated gun would run on 400psi. Half the pressure, but twice the volume. That chance in flow characterists would certaintly have an effect on how it spins the paintball, but I don't know how. SLower? Faster?

the sniper we were using is sprung for unregged CO2. It starts to shoot down in high temperatures - and the reg that's currently on it is set really high - so most likely above 500 psi.

I had not considered the pressure of the marker - but as I recall Tom Kaye at one point measured a bunch of gun - and everything was in the 60-120 psi range in the chamber - so I don't think that would matter.

[cockerpunk]

since OP has nothing to do with breach pressure ...

[c6quad]

it's seems like 60-120 PSI is a pretty big difference in pressure, no??

i was wondering about the wind myself. it was a strong breeze in that video and that shouldn't be ignored. wind has a profound effect on real bullets and probably even more of an effect on a paintball. you may want to think about that when testing the Cooper-T. test early in the morning or late evening when the wind is calm.

[cockerpunk]

the "strong breeze" is mainly the result of me having the jack the sound up as high as i could.

[cockerpunk]

and the thing about OP is that some guns that run at 800 psi have a breach pressure of 75psi, and some guns that run at 240 psi have a breach pressure of 110 psi.

yes, i do want to get my hands on a pressure transducer. i dont have one.

[c6quad]

Originally Posted by cockerpunk

the "strong breeze" is mainly the result of me having the jack the sound up as high as i could.

dude... look at the video... the limbs on those trees are blowing around a good bit. you can't deny that that has an effect.

[cockerpunk]

Originally Posted by c6quad

dude... look at the video... the limbs on those trees are blowing around a good bit. you can't deny that that has an effect.

i didn't say there was no breeze, but it sounds much worse than it was.

we dont have an indoor place to test, so we just hope for the best. so far both days of testing have had pretty small wind, so cross your fingers.