I dan't know. I just know they played funky: banked short and you couldn't
spin them.
Lou Figueroa
fondly remembering the tables and balls at the Playground
in Kalamazoo were you could twist a ball off the rail like a pretzel
> > Ross, you have a good point. I felt like the tables were banking short.
> [...]
> Here's a hypothesis on the banking short phenomenon.
> There's two things that change the ball path from the light-ray path.
> First, friction with the rail from coming into the rail at an angle
> wants to *shorten* the bank, i.e., the rail pushes the ball sideways.
> Second, after coming off the rail, the object ball usually still has
> some topspin that makes it curve in the *long* direction. Thus, there
> is at least some cancellation of these effects.
> If you go to slicker cloth, the rail collision can't shorten the bank as
> much, and the topspin, which takes longer to grip on the cloth, can't
> widen it as much. So there's even a tendency for even the *changes* to
> cancel a bit.
> Stickier cloth has the banks shortened more by the rail but also widened
> more immediately coming off the rail.
> This gives the normal expected variations in tables with speed, etc.
> But what if... what if the friction with the rail cloth was *different*
> from the friction with the bed cloth?
> If the rail friction was larger than the bed friction, the shortening
> from the rail would be more pronounced than the widening off the rail,
> leading to unexpected behavior.
> Perhaps the new cleaning procedure slickened the bed without slickening
> the rails ???
> just a thought.