old68
11-18-2001, 11:17 PM
I have heard alot of people worried about deceleration (barrel length affecting range. Ok, there has been alot of speculation on this subject so I am going to clear a few things up with a crash course in Newtons Laws. It's been a while so I'll try my best.
First, I will start everyone off with a few definitions in very general terms.
At rest; an object is at rest when it's velocity is 0.
Aceleration(Deceleration is negative acceleration); Rate at wich an object changes it's velocity.
Velocity; rate at wich one object varies it's position in relation to another. (earth for example is moving very fast, but when we calculate an objects speed here on earth we take earth as the reference object)
Inertia; Tendency of objects NOT to vary their velocity or to maintain constant velocity. If at rest, tendency to remain at rest.
LAW of INERTIA; An object will ONLY vary it's velocity in movement, or begin to move while at rest, when an external force is applied to it. (read an object will only accelerate or decelerate while a force is applied to it)
NOW FOR THE EXPLANATION
1;Paintball enters the barrel.
2;Compressed air is released force is applied to the ball, the ball accelerates (at this point we also have another force, the force of friction with the barrel, but this force is weaker than that of the expanding gas).
3;Released air no longer accelerates the ball. Now the ONLY acting force (that we will consider because it's also pushing the air in front of the paintball of it out of the barrel) is FRICTION. ball decelerates.
4; Ball exits barrel at the chronoed velocity. At this point the ONLY acting forces are gravity pulling the ball down and air resistance as the paintball travels.
At this 4th stage, (consider that a ball leaves a short barrel and a long barrel at the same velocity), the ONLY acting forces on the paintball are the same, wind resistance and gravity. One slows the ball (both balls at the same rate) and the other pulls them to the ground(at the same rate). Therefore, there should be absolutely NO DIFFERENCE IN RANGE WHATSOEVER[/b] PROVIDED:
-The paintball leaves both barrels at the same velocity.[/b]
OK, so that covers the scientific part of the flawed deceleration theory on longer barrels. It will take more compressed air (not much more) to achieve the same velocity on the longer barrel. (VERY LITTLE DIFFERENCE). Towards the end of the barrel there is very little friction because the barrel is not as "tight"as at the breech.
MY PERSONAL OPINION. I have noticed little differences in trajectory when comparing longer and shorter barrels and have found the 14" barrels MY personal favorite, and also because they seem a little more quiet.
I hope some of you find this useful.
First, I will start everyone off with a few definitions in very general terms.
At rest; an object is at rest when it's velocity is 0.
Aceleration(Deceleration is negative acceleration); Rate at wich an object changes it's velocity.
Velocity; rate at wich one object varies it's position in relation to another. (earth for example is moving very fast, but when we calculate an objects speed here on earth we take earth as the reference object)
Inertia; Tendency of objects NOT to vary their velocity or to maintain constant velocity. If at rest, tendency to remain at rest.
LAW of INERTIA; An object will ONLY vary it's velocity in movement, or begin to move while at rest, when an external force is applied to it. (read an object will only accelerate or decelerate while a force is applied to it)
NOW FOR THE EXPLANATION
1;Paintball enters the barrel.
2;Compressed air is released force is applied to the ball, the ball accelerates (at this point we also have another force, the force of friction with the barrel, but this force is weaker than that of the expanding gas).
3;Released air no longer accelerates the ball. Now the ONLY acting force (that we will consider because it's also pushing the air in front of the paintball of it out of the barrel) is FRICTION. ball decelerates.
4; Ball exits barrel at the chronoed velocity. At this point the ONLY acting forces are gravity pulling the ball down and air resistance as the paintball travels.
At this 4th stage, (consider that a ball leaves a short barrel and a long barrel at the same velocity), the ONLY acting forces on the paintball are the same, wind resistance and gravity. One slows the ball (both balls at the same rate) and the other pulls them to the ground(at the same rate). Therefore, there should be absolutely NO DIFFERENCE IN RANGE WHATSOEVER[/b] PROVIDED:
-The paintball leaves both barrels at the same velocity.[/b]
OK, so that covers the scientific part of the flawed deceleration theory on longer barrels. It will take more compressed air (not much more) to achieve the same velocity on the longer barrel. (VERY LITTLE DIFFERENCE). Towards the end of the barrel there is very little friction because the barrel is not as "tight"as at the breech.
MY PERSONAL OPINION. I have noticed little differences in trajectory when comparing longer and shorter barrels and have found the 14" barrels MY personal favorite, and also because they seem a little more quiet.
I hope some of you find this useful.