Originally Posted by Bob Jewett:
You don't have to have perfect gearing outside for this technique to work. It only has to be enough outside that the balls are gearing by the end of the ball-ball contact. In that case, the amount of friction between the balls stops being a factor in the cut angle.
Skid/cling/kick can only occur on shots where for normal friction the cue ball is still slipping on the object ball at the end of ball-to-ball contact. If you add extra friction, there will be more throw than for a normal shot.
A conclusion from this is that there is a range of spins close to gearing that can't produce skids. The throw for this range is both to the left and right of the CB-OB line of centers at contact.
A further conclusion is that stun shots without side spin up to about a 20-degree cut will not skid. This is because that is the range for which the balls will achieve gearing by the end of contact for normal values of ball-ball friction.
You don't have to have perfect gearing outside for this technique to work. It only has to be enough outside that the balls are gearing by the end of the ball-ball contact. In that case, the amount of friction between the balls stops being a factor in the cut angle.
What I was hoping to say, more briefly:... Consider an outside-english cut shot where the CB and OB would normally gear together during the hit (after sliding ceases) If the amount of outside were different, it is possible the balls would not gear before separation. ...
Skid/cling/kick can only occur on shots where for normal friction the cue ball is still slipping on the object ball at the end of ball-to-ball contact. If you add extra friction, there will be more throw than for a normal shot.
A conclusion from this is that there is a range of spins close to gearing that can't produce skids. The throw for this range is both to the left and right of the CB-OB line of centers at contact.
A further conclusion is that stun shots without side spin up to about a 20-degree cut will not skid. This is because that is the range for which the balls will achieve gearing by the end of contact for normal values of ball-ball friction.