Need some data quick...

[Duck Hunt]

I'm trying to educate some of my peers, and its not working very well without hard evidence. Their arguement is: With an Angel cycling 20 times a second, the balls will be spaced 4 inches apart from each other after they leave a 14 inch barrel, but the actual BPS will be less because of the friction between the ball and barrel.

My arguement is: That the distance between balls gradually becomes more consistant, the first couple of shots being a certain distance apart, then gradually becoming the same distance. And that you do not lose any FPS until AFTER the ball leaves the barrel, since the ball in the chamber accelerates at 50,000 FPS in 6 milliseconds.

Now, I'm no genius, but to me it would seem there would be NO speed loss until after the ball left the barrel.

Sean

[Jakedubbleya]

hmmm...?

I'm trying to educate some of my peers, and its not working very well without hard evidence. Their arguement is: With an Angel cycling 20 times a second, the balls will be spaced 4 inches apart from each other after they leave a 14 inch barrel, but the actual BPS will be less because of the friction between the ball and barrel.

My arguement is: That the distance between balls gradually becomes more consistant, the first couple of shots being a certain distance apart, then gradually becoming the same distance. And that you do not lose any FPS until AFTER the ball leaves the barrel, since the ball in the chamber accelerates at 50,000 FPS in 6 milliseconds.

Now, I'm no genius, but to me it would seem there would be NO speed loss until after the ball left the barrel.

Sean

I think you mean 50k fps durign the first 6 milliseconds... :)


There is definite slowing by the barrel, after the first inital slow, the balls will be spaced evenly (forgetting that the heat of both the HPA and ball friction would slightly change the parameters of the barrel, creating slightly different ball to barrel friction/slowing periods each time). If you allow for that initial slowing, the gun WILL be cycling and shooting at 20bps.

I think your both a bit confused by each other though, trying to argue two somewhat unrelated topics... or maby im just stupid lol.

anyway no hard evidence, just B.S. sorry

[athomas]

It is always dependent on time at any given spot. Each ball accelerates at the same rate, so they will increase speed in the barrel at the same rate and slow down at the same rate once they leave the barrel.

There gun is cycling at 20 bps. Therefore, every 50ms a ball will pass a given point no matter where it is in the stream. If the gun is chronoed to 300fps at the barrel tip, then there will be 15ft of separation (given no neg acceleration). Actual separation will be slightly less as the ball slows down as it moves away from the barrel. The farther away from the barrel we get, the closer the separation will become because the farthest balls travel less distance in the same time frame than the closer balls (ie; the balls will catch up to each other). When the balls come to a stop, the time separation will still be 50ms but the separation distance will be zero.

If the barrel is not perfectly tuned for your gun, then there may be some negative acceleration before the ball leaves the barrel. A good example of this is with any ported barrel. The acceleration portion of the barrel is the unported section. After that point, the ball begins its slowing down even though it is still inside the ported section of the barrel.