Thanks to Jarre for linking to this definitive video clip of a very young Mike Dunaway (look at that persimmon driver, this could have been filmed twenty years ago or more). It solves for me the mystery once and for all – there is no such thing as a mechanically-correct “modern swing” (planted heel action).
Now, Dunaway’s heel lift is so subtle that I couldn’t see it in all of the lower-quality videos I watched on Youtube, but this is clearest video I’ve even seen of hiss swing.
Mike Dunaway’s Not-So-Modern Swing Action
There are still differences between his action and Austin’s, such as the much more squared feet, the ball position that is back of the leading foot (from the rear view, you can clearly see the ball when it should be hidden by his left foot when hitting driver), and his swing plane is much flatter than Austin’s.
These are all differences to the same mechanical motion principles that Austin himself used, however.
At any rate, this may vindicate my decision a few weeks ago that I was going to abandon trying to create and explain a mechanically-correct swing with the planted heel for people who insisted on swinging with a planted-heel motion.
I had pegged Mike Dunaway as having the perfect modern swing when it appeared to me that his foot remained firmly planted during the back swing. This video clearly shows that I was wrong about this (with apologies to Mr. Dunaway).
The fact that it is such a minimal and subtle lift would be due to or the cause of his flatter swing arc and squared feet. You will notice however that (and I’m not trying to be picky here, just saying what I see) that Dunaway’s left foot rolls through the impact and follow-through, a direct result of the squared position at address.
All in all, it’s obviously a great mechanical motion, and one that is very similar to Mike Austin’s, with the few differences I’ve mentioned.