For Hitting, when/where in the Downstroke is the correct place to begin applying the Right Arm Thrust?
When does the Hitter employ his Right Arm Thrust? It depends upon the Release employed.
Obviously, the Release is earlier with the Sweep Releases (10-24-A/B/C). For Maximum Power (6-B-1-A) and Maximum Trigger Delay (6-B-1-C), the Release is Delayed until the Right Elbow passes the Line of Sight to the Ball.
Lee Trevino spoke of this Delay in terms of a string he imagined attached to the Ball on one end and his chin on the other. On the Downstroke, when his Hands 'broke the string,' the Right Arm fired -- automatically.
For me, the hitting impulse is programmed at the top of the swing. When my pivot moves my hips, right shoulder and right forearm into position, the #3 pressure point increases ...
I can also right arm thrust by using tricept muscles but this seems more of a punch sroke and my right shoulder has to travel further down plane to the ball and occurs much closer to impact. Not as massive feeling, but effective.
[Bold by Yoda.]
For both Hitters and Swingers, the Pivot Loads the #3 Lag Pressure Point during the Start Down. This insures that the Body will lead the Power Package into the Downstroke and offers assurance that it will continue to do so into the Finish.
For Hitters, the Loading is maintained on the Aft side of the Shaft. Since the Right Forearm supports this Loading Action, this procedure simultaneously Loads the Bent Right Arm. Led by the Hip Slide (parallel to the chosen Delivery Line), the Downstroke Right Shoulder Turn takes up the initial inertia -- the disinclination of the Sweet Spot to follow.
But...the Shoulder Turn is slow, and its ability to continue the Downstroke Acceleration soon pales in comparison to that of the now Loaded Right Triceps. Accordingly, the Right Shoulder early in the Downstroke ceases to apply Thrust. Instead, its Action (actively doing work) becomes merely Motion (permitting, but not causing, other events to occur).
It thus becomes the Launching Pad -- the 'recoil' platform -- for the Driving Right Arm.