- Jun 25, 2004
Billy, I know all that stuff. What I'm trying to determine is WHY that happens. What are the physics of it. I like to know things like this, so that I can apply it to other situations. I Emailed Bob Jewett, so we'll see if he replies. If he doesn't know, some of the others will. I realize that some of you hate the science guys...Doc, inside english clearly lengthens, or opens the bank up on certain angles but not all angles. The english transferred to the object ball serves a double role to open the bank or lengthen the bank. On angles that are flat the object ball carrying the opposite english (not running)slides off the cushion, that helps to lengthen the shot not only that but the spin that is transferred acts as a masse and helps the ball to stay closer to the banked rail.
You can try it with just using the cue ball starting from a marked position and use both left engish and right english, and then look at the results that you get. The cue ball with the running english will not slide or open up nearly as much as the cue ball carrying the opposite english. Dr. Bill