[pistol]

Pistol

It is my biased opinion that you may have problems with respect to understanding cause-and-effect relationships in human biomechanics.

You seem to have difficulty understanding how a fast hip turn at the start of the downswing can cause the clubshaft to shallow-out/flatten. You also seem to have difficulty understanding how a flattening clubshaft at the top of the swing can produce forces that promote left wrist flattening. You state that a fast hip turn can increase cupping. It can if the clubshaft is kept across-the-line. However, Hogan's clubhead moved backwards (away from the ball-target line) so that his clubshaft became laid off at the start of the downswing, and that clubshaft movement makes it much more difficult to maintain a cupped left wrist. In fact, that clubshaft movement promotes the passive acquisition of a flat left wrist.

Also, whether a golfer decides to allow the left wrist to be flattened in response to forces that shallow/flatten the clubshaft is still under control by the golfer. It is obviously possible for a golfer to deliberately resist those forces and intentionally maintain a cupped wrist.

There is a second biomechanical phenomenon that promotes a flattening of the left wrist when the downswing starts with a fast hip shift-rotation movement. That fast lower body movement also causes the right elbow to be pulled rapidly down towards the right hip area, and because the right arm flying wedge remains intact, that right elbow movement causes the right forearm and right hand to be pulled down under the flattening clubshaft, which in turn promotes further flattening of the clubshaft - as can be seen in this photo.



Whether you find my biomechanical explanation credible, or not, the photos demonstrate the "reality" that Hogan's left wrist flattened at the start of the downswing, and this biomechanical event would cause the clubface to close slightly if the left wrist was previously cupped.

Jeff.

Jeff i don't find any of your explanations above to be credible because they all have holes in them as large as the milky way galaxy . Now you state i don't understand that a hip turn may/will flatten out a shaft plane which is a silly statement because i do.The wrists can operate indepentantly of the forces on the shaft and wrist angle can be increased whether laid off or across the line. And a fast lower body with a deep pitch elbow doesn't mean the wrist can't be cupped there just look at the photo you posted yourself.
You state that i have difficulty understanding cause and effect which is ludicrous Jeff because i CAN DO and you can't and you are NOT a biomechanist.
Your explanation on Hogan is probably the weakest arguement i have ever seen stated
It is obvious that the wrist flattens but you cannot even offer a credible arguement that a turning hip will cause this except to say the flattening shaft creates forces on the wrist
Here is something for you to look into so you can be better educated. There is footage there Face On of Hogan post accident 1960's where its clearly evident that his hands have already moved longitudinally away when his left hip has not even started to clear in fact he is still finishing his lateral shift with the right buttock/leg so that clearly shows that the turning left hip has nothing to do with the wrist change
Now TT method of delivering the right hand and releasing against a firm left hand would make a lot more sense rather than the fiction you have stated
How many years you work on a golf swing JEff? Why do you seem to think that the TT concept is not correct after all he was at it for what 60+ years? ITs obvious that it would fit the criteria for the clubface being squared to the arc and the 3 right hands comment by the man himself.Why is your arguement based on the 2 reasons above that are so flawed?

Watch this and you will see the left hip has not begun to clear at all