I think I get cha. The thing under consideration is the RATE of Acceleration. People who establish a Rate that they cant sustain through impact and beyond loose the lag pressure in the #3 pp as the clubhead passes Hands. This is what is meant by Over Acceleration. If you can maintain a Rate fine, if you cant, not good, especially if you subscribe to the belief that Lag Pressure is a good thing.
Further to this is the thought that given it is a Rate that is being considered here, it is possible to see the Rate subside and still be Accelerating. You can do your own experiments in this regard in your car with the pressure your back feels against the seat as a stand in for your #3 pp. From a a quick start, when the Rate is increasing lots of pressure, when the rate subsides or decreases though you may still be accelerating but just not as quickly, the pressure decreases. When you reach a non accelerating speed the pressure will be non existent though your actual MPH may be substantially faster than what you were doing when first taking off. Sitting in an airplane going several hundreds of MPH , no pressure. Poor Astronaut on a rocket sled ..........brain damaging G force.
Somewhere in all of this is a balance between MPH or clubhead speed and the added mass associated with acceleration, lag pressure, a pre stressed clubshaft and COR etc. Im not up to the physics of that one. But lag pressure is a good thing for both the physics and the geometry in a golf sense. That I know from years of fighting throw away and the root cause of it, "over acceleration" like everyone else.
What do you think? Menace to Lag and Drag Pressure?
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