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Old 01-29-2014, 02:55 PM #1
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how much air is hitting the ball

not 100% sure but is the operating pressure of the gun how much force that is applied to shooting the ball
say the gun runs at 100psi is there 100 psi hitting the ball
if so this amazes me since a drop from shoulder high will break most paint
ive been playing for about 15 years on and off but never really thought about it.
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Old 01-29-2014, 03:07 PM #2
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100psi is how much pressure is required for the system as a whole to function properly.

It depends on what gun you have as well.
Guns with an LPR might have an operating pressure of 250psi, but that's not all going to get channeled to the ball.

I don't know paintball gun physicsometry so I'll leave it up to someone like Lurker or the other boffins on here to explain what percentage/portion and so forth that get put through.

The paint can definitely take a beating if it's applied properly.

Spheres and eggs are super resilient when force is applied from multiple points or over a wide area. When it hits a flat surface, only a small point of the ball has all the force being put on it, which in turn will break the concentric-ness (I know, not exactly a real word) of the shape and it will then proceed to break down since there's a point that now will take the force and allow for the shape to collapse, if that makes sense.
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Old 01-29-2014, 03:37 PM #3
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Quote:
Originally Posted by aclark364 View Post
not 100% sure but is the operating pressure of the gun how much force that is applied to shooting the ball
say the gun runs at 100psi is there 100 psi hitting the ball
if so this amazes me since a drop from shoulder high will break most paint
ive been playing for about 15 years on and off but never really thought about it.
I haven't gone through the full calculations but here's some food for thought:

When you drop a ball from shoulder height, the entire force of impact is distributed to a small area of the shell in a very small amount of time.

When you shoot a ball from the marker, the bolt initiates forward motion by applying force to a large area of the shell and the subsequent burst of compressed air is applied to nearly half the ball.

How easily a ball breaks will depend on the time of exposure and the size of the area force is applied to. As you can see, dropping a ball occurs over a small time and small area, whereas shooting a ball occurs over a longer time and larger area. Think of popping a ball with a fast needle vs a slow thumb.
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Old 01-29-2014, 08:17 PM #4
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That's absolutely correct. You always need to talk about pressure instead of force. Pressure is a force applied over an area. Theoretically speaking, a perfect sphere (paintball) contacting a perfectly flat surface (sidewalk) has an infinitely small point of contact. Since F=P/A and area = 0 so the force goes to infinity. Of course that's not true because the ball deforms.
Talking about air hitting the ball the air is dispersed over the surface area of the ball. In addition there is nothing holding the ball back other than its own inertia.
Going back to the sidewalk, all of the balls momentum is directed downward, while the sidewalks normal force is directed upward.

To answer your question, take a pump marker and figure out exactly how many shots you get on each tank and exactly how much is in the tank before and after. some math would find the answer for you
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Old 01-31-2014, 11:23 PM #5
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keep in mind that the lower the operating pressure of a marker doesnt exactly mean its easier on paint. its all in the overall design. most modern electros run around 200psi give or take 20 and can still break paint no problem if set up wrong. whereas an old cocker for example running nearly 400psi can be setup to be gentle enough it wont even chop a ball if theres a mis-feed.
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Old 02-01-2014, 04:40 PM #6
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Sounds like a interesting question. Good responses. Im no physics expert and always wondered myself.
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Old 02-02-2014, 11:58 AM #7
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just thought i would ask
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