Posted by: Hitter () on Mon Nov 1 16:58:15 2004

>>> This force creates a torque about the wrist joint, being the product of the force on the bat created by the top hand times the lever arm of that force, i.e., about 3 inches. <<<
>
> Hi JJA
>
> I would say the lever arm (center of the left hand to the center of the right hand) is closer to 5.5 inches. However, regardless of the lever arm measurement, tests show that 45+ mph bat speed can be generated by keeping the right-hand in a fixed position and applying BHT alone. This bat speed is generated independently of THT or any "flailing action" from a CHP.
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> Jack Mankin
>
I don't know how much the wrists are involved, but they must transfer the energies into the bat.

I think we all know the THT and BHT are terms to describe the transfer of the energies involved. They are mechanical means to transfer the bodies energy into the swing.

I don't take them to mean they generate great bat head speed by themselves or by the wrists alone, but they do transfer the energy to the bat.