Does English Alters Cue Ball Path Even if there's no contact with Rail?

[TATE]

Tate, it doesn't. You understand the results, but not the "why". English has no effect until the cb hits the rail. What is happening in your case, is that using english, you get squirt with the cb. That causes you to hit the ob off center, but the throw from the english brings the ob back on line, making the ball. Hitting the ob off center, you now have changed the tangent line off the ob, making it appear that the english had an effect on the tangent line. It does not.

I'm talking about spin induced throw. Left english throws the OB right and cue ball left, for example, due to friction on contact.

Are you saying that spin induced throw does not alter the path of the cue ball or object ball at contact?

 

[3andstop]

If the CB is being hit on its equator, ( no follow, no draw) then left or right spin won't effect the tangent line.

However, tangent lines are determined by the perpendicular bisecting line to the contact point.

Shooting a shot ( and making it in the pocket) with sidespin will change that contact point slightly and therefore give the appearance that the CB diverges differently.

If that makes any sense.

 

[Patrick Johnson]

I'm talking about spin induced throw. Left english throws the OB right and cue ball left, for example, due to friction on contact.

Are you saying that spin induced throw does not alter the path of the cue ball or object ball at contact?

The cue ball follows the tangent line immediately after contact, just as it would with no sidespin (except a little slower). The contact point is a little different so the tangent line is too, so I guess you could say that's "because of" throw even though throw isn't the direct force changing the CB's path.

pj
chgo

 

[Neil]

I'm talking about spin induced throw. Left english throws the OB right and cue ball left, for example, due to friction on contact.

Are you saying that spin induced throw does not alter the path of the cue ball or object ball at contact?

What 3andstop and PJ said.

 

[TATE]

The cue ball follows the tangent line immediately after contact, just as it would with no sidespin (except a little slower). The contact point is a little different so the tangent line is too, so I guess you could say that's "because of" throw even though throw isn't the direct force changing the CB's path.

pj
chgo

For example, on a nearly straight in shot with outside english stun, the momentum on the cue ball seems greater with spin throw than it is on a pure stun shot. I find it easier to control the cue ball speed because of this. (Maybe it's my imagination).

 

[Patrick Johnson]

For example, on a nearly straight in shot with outside english stun, the momentum on the cue ball seems greater with spin throw than it is on a pure stun shot. I find it easier to control the cue ball speed because of this. (Maybe it's my imagination).

It's not your imagination that the CB retains more forward momentum with outside spin - because outside spin reduces or eliminates "braking" friction between the balls.

pj
chgo

 

[the kidd]

Jimmy Reid Maven

I'm happy to support Jimmy and the sale of his DVD's. However, not everything he believes is right.

Jim was probably the most intelligent player of all but one must just try everything himself. Has anyone used modern digital techniques to show what happens when spin is applied?