[BerntR]

So, from an Opinion perspective, why would HK claim the power package was only accumulators and pressure points above the waist?

For discussion sake, we have 3 pressure points in the hands with 2 accumulators. If the hands can have 2, why would the pivot be classified as only 1 power source when there are multiple components and segments to the pivot itself?

The point is not that they are above the waist. The point is that they deliver power to the levers.

Remember that in a swing, the pivot does basically all the work. A firm extensior action doesn't add work. It just enables better energy transfer from the pivot.

According to said above the pivot doesn't power the club solely through pp 4 either. There is a reason that the three other power accumulators are labeled accumulators and not something else, like power generators. While Homer to some extent chose to define his own terms, there are some very clear relationships towards textbook mechanics and mechanical engineering in TGM. And it is hardly a coincidence that he used the term "accumulator".

Very powerful swing stroks can be produced without engaging pp4, and the pivot basically generates all the power. I agree 95% with what 12 piece bucket wrote earlier. But his indication of pp4 as the only channel for transmission of pivot power is something I disagree with - if that's what he meant.

Homer's terminology works pretty well. And it works even better if one spends two minutes thinking about what an accumulator is, and what it does. An accumulator isn't a device that produces work. An accumulator is a device that stores energy and release it when it is called for. Big difference.

Energy generated by the pivot is accumulated as mass-velocity in the pivot. This mass-velocity, this energy is then released to the lever assembly. Through all the pressure points. By means of all the accumulators used. I don't think Homer would have used the term accumulator if he figured that only acc 4 had something to do with accumulation and release of power. Because it would be inconssistent terminology and because it would be wrong. Homer was a smart guy.

In a pure swing the right arm will work as a pure accumulator in the form of extensior action. Just contributing to the integrity of the flying wedges while the pivot with the big muscles does all the work. In a hitting stroke the right elbow will still be an accumulator but it will also do work on it's own. The active thrust. I doubt that any of the other accumulators do any significant amount of work of their own - unless a very special stroke is called for. The hands are basically monitors and passive clamps - and there isn't much pp4 can do alone either. What the four accumulators have in common is the ability to channel energy accumulated in the pivot towards impact.