Posted by: Jeff M () on Thu Nov 9 18:54:49 2006

> > Hi Dave
> >
> > You may be right and I am sure my mechanics are not perfect. However, when I swung the PathFinder with the swivel handle (no torque), my CHP developed bat speeds in the mid-forties. When I held swivel handle stationary with my right hand and pulled back on the knob with my left hand (torque - BHT), I also developed bat speeds in the mid-forties.
> >
> > When I applied both CHP and BHT, I generated bat speeds in the upper sixties. Those figures are close to what you would expect f=mvv to compute. Therefore, I concluded that about 50% of my bat speed was generate from my CHP and about 50% from BHT.
> >
> > Jack Mankin
>
> Hey Jack
>
> Point taken with your swivel handle bat but that only produced 60+MPH of speed but what would give the bat the rest of the 20-30MPH that is produced in a full swing of a bat. Though your experiment gave you a speed produced by CHP and torque it did not give you the total batspeed that could be generated with a full body movement. Therefore the really statement is that bat speed produced by CHP and BHT is equal and when added together produces significant batspeed but not 100% of the batspeed. The accumulation of all movement that influences the motion of the bat produces the final batspeed rate.
>
> Numerous experiments would be required to determine exacting what body parts help to accelerate the bat though the processes of CHP and BHT.
>
> Did you find the article about the golf club speed interesting and how it would apply to hitting a baseball?? Wrist cock and release close to contact was significant and if you think about hitting a baseball the same applications hold up with the difference being ideal hitting location in it relationship to the ability of the batter to get the longest period of time that BHT could be applied. The longer a person can apply torque on the bat the larger the impact zone cold be.
>
> DAve P

Jack-
The body has a series of levers acting in unison during the swing. Various angles or deflections of these levers during the foward swing creates a cause & effect action which results in different swing speeds and swing plane. Your f=mv calculations need to be reviewed/revised. You seem to have a basic understanding of the laws of physics (as related to power), but you are not tieing all the critical components together which would then = a clear explanation. If you wish, I can prepare a series of reports that explain true hitting.
Jeff M