Dr Mann
I have been reviewing the delayed no-roll subtype DH hand release action.
Firstly , can I assume that this first diagram in your chapter below has been superceded by the 2nd diagram (seen in
perfectgolfswingreview.net/VP9.html )?
perfectgolfswingreview.net/HandRelease.htmDiagram showing the clubface orientation relative to the clubhead arc through the impact zone
Note that the clubface is relatively square to the target and clubhead arc in the immediate impact zone - yellow-colored zone - and that zone can be considered to be a *
flat spot in the clubhead arc (* think of the "flat spot" as being a slight flattening of the curvacture of the clubhead arc through the immediate impact zone so that the clubhead arc doesn't move inside-left immediately after impact).
Here is a diagram showing the pattern of clubface roll that would happen immediately post-impact if a golfer uses a DH-hand release action.
It is important to realise that the
clubface must always be rolling (rotating) as the clubhead moves through the immediate impact zone, and it would be "artificial" and biomechanically unnatural to keep the clubface constantly facing the target during that entire time period. If a golfer minimised the amount of clubface roll during that time period to the smallest amount practically possible, then he would very likely be keeping the clubface square to the clubhead arc during the entire P7 => P7.2 time period.
I'm assuming that the top diagram would imply a type of 'steering' which you no longer believe in your 2nd article. Am I correct?
The other issue relates to your answer in the previous post above:
"A delayed full-roll is doing HH from impact, but at such a slow rate of closure between P7 and P7.2 that it behaves like a no-roll in the sense that the clubface remains square to the clubhead path between P7 and P7.2."
I can understand the above if there is a large PA3 angle where the rate of clubface closure per unit travel is small. But can a golfer still have a 'delayed full-roll DH subtype hand release action' (with a neutral grip) using 'Diagonal Hinging' (for at least a temporary period from P7-P7.2)? In fact , why is 'Diagonal Hinging' no longer a feasible biomechanical option to create a 'DH' hand release action (with clubface square to clubhead path)?
DG