[ram418]

If you imagine the path of your hands traveling in your motion as a wheel (7-23), the 'widest possible' path of the hands would be a circle around your center of balance.

In a straight line delivery, your hands go from the 'edge of the rim' at the top, directly in a straight line INSIDE the circle towards your aiming point/both arms straight and at both arms straight they are again 'touching the wheel rim'. A 'feel' of 'narrow to wide' (top to both arms fully extended). A delayed release/max trigger delay and a more powerful (but tougher to time) motion.

In a circle delivery path, your hands effectively 'attempt' to STAY on the rim all the way 'around the circle'. A very 'wide' feel in which you release fully and smoothly from the top - very nearly throw away. A very consistent, but much less powerful motion, much simpler to judge distances.

How does the concept of Straight Line Delivery Path coincide with the Radial Acceleration of the Hitter?

I think of "radial" as moving along a radius (of a circle).

If the hands move from the Top to the Aiming Point, along what radius (of what circle) do the Hands move on?

What am I missing about Radial Acceleration of the Hitter?