[BerntR]

First of all, I think this is a big and difficult topic and I'm eagerly looking forward to how it develops. How we time the release, yet continue as if the ball just gets in the way is somehow of a mistery to me.

I don't believe in linear hand path or linear clubhead path, for that sake. I think Homer's endless belt has merits as long as the straight parts of the belt only has a bigger radius than the curved parts. But I don't believe in 100% straight. One thing is that I can't do anything golflike and straight with my right hand without bending the elbow, which is like cheating. Another thing is that the hands will get in the way of the throwout if the speed buildup starts as a straight line.

If you started on a linear path and then turned the corner to allow cf to do it's thing, your hands would get in the way of the club on it's straight path. But as long as you move the club head in a circle, CF will pull it straight away from the swing center. Not in the direction the clubhead is going, but with a 90 degree angle to the clubhead travel.

Rope pulling and curved lines is not a problem. Just attach a weight to a string and do the "David Leadbetter" centrifugal force demo and you'll see. You can spin the weight forever by simply pulling the rope, just as long as you move the pull end of the rope in circles. And you can build a lot of speed that way. But you can't increase the speed forever.

As long as the spinner (your hand) can beat CF of the weight and stay ahead with a few degrees on it's circular travel, the speed will increase. But sooner or later the weight will catch up with the spinner and you're not able to build any more speed.

When you do this "demo" you will typically start by moving your hand (the spinner) in a big circle, and as the speed build up you will be forced to reduce the radius of the hand's circle if you want to stay ahead as long as possible.

Somehow I believe this is quite similar to what happens when you speed up the club head towards impact. Big radius first ( on the inside of the swing), then a smaller hands "pulley" and then the whole thing collapses (hopefully after the ball is gone).

The timing of the release must have something to do with the timing of the overtaking. And I believe pulley size manipulation and a gradual increase in the pulling & torquing forces until you're not able to increase it anymore are some of the most important means in timing the release.

The throw - basically any throw - is typically a motion that starts with a big radius and ends with a small radius. Towel snapping and whip cracking comes to mind. And golf.