Jump to content


gdot5

Member Since 20 Oct 2008
Offline Last Active May 06 2010 08:09 AM
-----

Posts I've Made

In Topic: Paintball spin

05 May 2010 - 05:50 PM


but if your trying to shoot a shot around a corner w/ an apex barrel the lesser viscous(sp?) should allow more spin which would = a greater curve in the shot and a higher likelyhood of hitting someone hiding behind something



not really if you go by physics

mass and energy concept if has better mass it would produce a better spin but less mass its most likely be able to travel greater distance because of less resistance blah blah blah lol i'm not a physicist this is what i remember from high school haha


You are very wrong in that statement unfortunatly. In two respects.

A thicker paintball will have LESS air resistance, not more. Assuming that both paintballs are the same bore, this would mean their surface areas are equal, so the total air resistance would be equal, however to what magnitude this force would affect the paintball is relative to mass. We know that an object with greater mass has more intertia, and would thus resist the air resistance greater than a less dense ball (lower mass=lower inertia). Just for the record, this is Newtons first law.

The second way is in saying that a denser ball will have "better spin". A spin force, also known as a magnus force, is caused by a thin layer of air around the ball that is for lack of a better term "attached" to the paintball interacting with the airflow around the paintball. Again, if both balls are spinning with identical RPM's and identical surface areas, the magnus force would also be equal. Just like the first point, newtons first law of inertia explains this. Higher mass means greater inertia, which means a greater resistance to this magnus force, and thus a lesser mass would mean the spin force would affect it to a greater magnitude.

However, it depends on how the ball is filled. If it is filled with a thick liquid, but there is a bubble of air inside (meaning an inconsistancy in the filling), then a centrifugal effect would be present on the paintball. To simplify, this would cause instability

In Topic: Intro To Paintball Physics

01 March 2010 - 10:09 AM

you might want to give them gravity

g = 9.806 m/s


two things
1) gravity would not EVER be 9.806 m/s, it would be 9.806 m/s/s (m/s/s = metres per second squared)


2) gravity is not a constant

depending on where you are in the world gravity will be different, (mass and distance between two objects affect gravitational pull)

Gravitational pull can be determined with the universal gravitational law
F = G * m1 * m2
............r * r


this also means if the moon is above you gravity will be different


HOWEVER since it is such a minute difference, you can just use 9.8 m/s/s