Patrick Johnson
Verified Member
- Joined
- Jul 31, 2008
- Messages
- 1,447
...the OB actually banks a little longer when hit harder - because digging deeper into the rail gives it a wider curved apex.
Yeah, most everybody thinks that - and that makes sense because it fits what we see. And I think the explanation that makes sense is probably the best one to help your game.i think that just the opposite is true. the more the ball sinks into the rail the shorter the bank. hence hitting banks hard shortens them up because there is now more cushion on the side of the ball.
But for anybody who's interested, a simple test you can do yourself (the one Jewett and Dr. Dave demonstrate in their video that I can't find) seems to show otherwise.
What you do is set up a frozen combo (to minimize cueing error) almost touching the rail (to eliminate forward roll) at whatever bank angle you want (use "donuts" for consistency), shoot the combo with the CB (from straight on, nearby for accuracy) and mark where the banked ball hits the opposite rail at different speeds.
The logic goes like this: if rubber compression is the cause then the bank angle without forward roll should still be wider at slower speeds. But if the bank angle without forward spin is actually steeper at slower speeds, then the cause of the difference is forward roll widening slow banks and the absence of it making fast ones shorter by comparison.
Or something like that.
pj
chgo
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