thats what i was thinking?Originally posted by Philip
Im pretty sure thats not true, is there not enough air coming out of your tank to fill in that 'vacuum'
mabe there is no reason for the holes?
mabe it helps put a spin on the ball?
barrel science
- Thread starter ChiZZerS
- Start date
mabe there is no reason for the holes?
mabe it helps put a spin on the ball?
Nope not for spin, It quiets down your shot!! did I not post that ???!?
Simple test, I have a javalin barrel for the Viking I'm using and a dye Ultralight. the Jav only has a single row of porting about mid way up the barrel, whereas the Dye is heavily ported. Is the Dye more accurate? No, is it quieter? Yes! With that quietness comes less gas efficiency though so there is a bit of a trade off.
Paul.
Listen to paul, all this talk about vacuums and cushions of air is complete nonsense. In artillery no vacuum is created before the powder is fired, the air in front of the shell and behind the shell should be at an equal pressure. The gunpowder being ignited increases temperature which increases the volume and pressure of the air behind the shell propelling the shell forward though the barrel. Does anyone know what a flash-suppressor is? Well its that weird looking piece at the end of the barrel with slots in the sides. This decreases the flare like flash of the bullet shooting out of the barrel. Porting works in a similar manner to simply make the paintball gun shoot quieter.
Second, spin. Putting spin on a paintball makes no sense in a purely physics sense. A paintball as you all may know is not very solid, and its shell has been shown to distort and change shape a bit when propelled out of a marker. Imagine in baseball, when a pitcher throws the ball with a curve, the aerodynamics of the ball are not at optimum to stay in line, but to curve. This is why the flatline barrel shoots paintballs at such a weird trajectory due to the back spin. The porting on say a freak barrel system will not alter the spin of the paintball in a noticible way so the porting does nothing for spin.
Third, air escaping in a controlled manner. There is some truth to this statement, but the air moving in front of the paintball is not significant, in fact the distortions on the paintball due to the air in front of the paintball travelling down the barrel, and the distortions caused by the paintball moving though the air are about the same, so the porting doesnt have a significant effect on the trajectory.
All in all, paul is correct, the porting does nothing but quiet the shot.
Second, spin. Putting spin on a paintball makes no sense in a purely physics sense. A paintball as you all may know is not very solid, and its shell has been shown to distort and change shape a bit when propelled out of a marker. Imagine in baseball, when a pitcher throws the ball with a curve, the aerodynamics of the ball are not at optimum to stay in line, but to curve. This is why the flatline barrel shoots paintballs at such a weird trajectory due to the back spin. The porting on say a freak barrel system will not alter the spin of the paintball in a noticible way so the porting does nothing for spin.
Third, air escaping in a controlled manner. There is some truth to this statement, but the air moving in front of the paintball is not significant, in fact the distortions on the paintball due to the air in front of the paintball travelling down the barrel, and the distortions caused by the paintball moving though the air are about the same, so the porting doesnt have a significant effect on the trajectory.
All in all, paul is correct, the porting does nothing but quiet the shot.
There is an area of dead air behind any projectile that is created as the air flows over the object in flight. This is because the air flows over the projectile at a rate which does not alow the space to be filled quick enough. This dead ir creates a burble which creates drag and destabilises the moving object. As a fully qualified skydiver i am rather familiar with the laminer flow f gases over moving objects, since this is what makes a erson stale in flight.
The amount its honed (how smooth it is) that the bore is true... have a think about it, what do you think makes a good barrel??
Paul
plus it makes the barrel look that little bit better (so they charge and you pay more) and obvioulsy makes it that little bit lighter
Waht makes a good barrel.. err well sad as I am .. I have been searching out barrel tests etc and apparently the only two things which really make a good barrel are.... as previous stated the degree of finish inside (to an extent) but mainly not so much the barrel as the paint you put through it.. good round paint that fits correctly is FAR FAR more important by the looks of things.
Oh and also a 2 piece or stepped design also helps a bit. I.E a tighter back section leading into a looser front section...
I can't really vouch for any of this but it sure makes sense to me.. Oh and apparently a longer barrel i.e bigger than the 6" optimum (??) will not give any more range but may MAY give more accurate shots over that range.....
I gotta get out more.................. anybody seen my camel???
Oh and also a 2 piece or stepped design also helps a bit. I.E a tighter back section leading into a looser front section...
I can't really vouch for any of this but it sure makes sense to me.. Oh and apparently a longer barrel i.e bigger than the 6" optimum (??) will not give any more range but may MAY give more accurate shots over that range.....
I gotta get out more.................. anybody seen my camel???