Leon Z. Seltzer, a 93-year-old professor who used to teach aerospace engineering for five decades, has his book in Feb 2008. Don't know if any one here read that before.
I got a copy as ebook and find an interesting part...He quantify the amount of "centrifugal force" but don't have much details.
His famous quote as an amateur player and a technical consultant for Callaway Golf, Goldwin Golf, Orlimar and several other top manufacturers is: “you can’t argue with physics”.
The book is not any kind of The physics of Golf, it is easy to read and I also enjoy his chapter on Golf Immortals.
__________________
If you cannot take the shoulder down the clubshaft plane, you must take along some other path and add compensations - now, instead of one motion to remember, you wind up with at least two!