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|03-10-2008, 04:03 PM||#111 (permalink)|
Join Date: Jul 2006
|03-10-2008, 04:04 PM||#112 (permalink)|
Traded guns for cameras
Nah, it's all good.
I'm all for scientific discussion relating physics to Paintball, I find it quite interesting. I just try to encourage people to develop theories, instead of conclusions.
|03-10-2008, 05:01 PM||#114 (permalink)|
Join Date: Apr 2007
so what's in dispute?
we all know that paintballs bounce when dropped on a hard surface - for the physics people out there - does the bounce mean it's deforming? The calculation for how much pressure is acting on a dropped ball should be pretty easy to calculate - KE = .5 * M * V(squared). So, for those with better math skills than me - how fast is a paintball going when it hits the floor dropped from 6 feet? - or to keep things easier - since we're doing the weight in grams from 2 meters.
gravitational acceleration is 9.8 mps/ps btw. Is it fair to assume that once we have a KE for a paintball hitting the floor - we can compare that to the force on the ball when fired? If so, we may be able to determine if a ball should deform in the breech.
I've read the TK stuff about deformation in that glass barrel - but he was using high speed photography - right? Does anyone know how precise he was able to get?
|03-10-2008, 05:11 PM||#115 (permalink)|
Join Date: Oct 2007
I'm mostly wondering this:
Suppose friction varies depending on geometry/ orientation of the ball/ seam
Variable friction means variable velocity
Variable velocity means variable consistency
So, the question is, how MUCH variance is there? Because suppose a Stainless barrel has something like a 5% variance in frictional force as compared to parallel force, between perpendicular seam and parallel seam, whereas Brass, or Tefloned ceramic is a .5% variance. That's a huge difference in consistency. But suppose it's 3% vs 2.8%, obviously negligible.
So suppose we have a brass barrel, like new, clean, polished, and minimal friction. And we have a CF barrel, used, marred/ covered in gelatin that has rubbed off and stuck, and much more friction. There could be quite a bit of variance there.
That's my argument for looking into materials.
|03-11-2008, 03:15 AM||#116 (permalink)|
Join Date: Mar 2007
Well, if you cut through all the inconclusive crap, the question the OP posed was answered within the first few posts and certainly within the first couple of pages. Which isn't surprising because some of the people who answered have seen this all hashed out before.
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