Bat Speed -- Baseball Hitting Forum

Posted by: Jack Mankin (MrBatspeed@aol.com) on Fri Feb 16 12:36:55 2001

>>> ;;Jack, not to split hairs but you say the bodys rotational energy comes [from] the angular displacement of the hands. Seems to me like the body's energy goes into the hand path. Your rotating on a stationary axis with the legs and hips and then the torso coming around is what I consider to be the kinetic chain. I don't see how all the energy can come from just hand path and torque, if so then you should be able to sit down in a non swivel chair and create the same batspeed as standing up. If you can't generate the same batspeed then that should be proof that some batspeed is generated from the work of the lower body and transferred to the hands. <<<

Hi rql

I am sorry you got that interpretation from may post. I should have stated it more clearly. The statement “I have stated many times that the rotational model I envision develops bat speed by transferring the body’s rotational energy from the angular displacement of the hand-path (circular hand-path)” was meant to convey the concept that energy developed in the body from rotation, is transferred into bat speed by the angular displacement of the of the hand-path.

A linear hand-path can not transfer the body’s rotational energy into bat speed. A linear thrust of the hands will accelerate the bat lengthwise (knob first) which is a “lower load” movement. In other words, extending the bat knob first requires little energy. The bat-head is merely trailing behind the hands. If the hands move forward 18 inches, the bat-head is only displaced forward 18 inches. --- A correct angular hand-path is a “higher load” mechanic. While the hands may move in an 18 in arc, the bat head will be displaced in a 60 to 80 inch arc.

With poor mechanics, the hands will seek the path of least resistance (a straighter hand-path). Although the hitter may find a straighter hand-path quicker and easier at first, he will also find less production.

Rql, I will respond to your lower-body/batspeed question tomorrow.

Jack Mankin

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> >>> ;;Jack, not to split hairs but you say the bodys rotational energy comes [from] the angular displacement of the hands. Seems to me like the body's energy goes into the hand path. Your rotating on a stationary axis with the legs and hips and then the torso coming around is what I consider to be the kinetic chain. I don't see how all the energy can come from just hand path and torque, if so then you should be able to sit down in a non swivel chair and create the same batspeed as standing up. If you can't generate the same batspeed then that should be proof that some batspeed is generated from the work of the lower body and transferred to the hands. <<<
> 
> Hi rql
> 
> I am sorry you got that interpretation from may post. I should have stated it more clearly. The statement “I have stated many times that the rotational model I envision develops bat speed by transferring the body’s rotational energy from the angular displacement of the hand-path (circular hand-path)” was meant to convey the concept that energy developed in the body from rotation, is transferred into bat speed by the angular displacement of the of the hand-path. 
> 
> A linear hand-path can not transfer the body’s rotational energy into bat speed. A linear thrust of the hands will accelerate the bat lengthwise (knob first) which is a “lower load” movement. In other words, extending the bat knob first requires little energy. The bat-head is merely trailing behind the hands. If the hands move forward 18 inches, the bat-head is only displaced forward 18 inches. --- A correct angular hand-path is a “higher load” mechanic. While the hands may move in an 18 in arc, the bat head will be displaced in a 60 to 80 inch arc.
> 
> With poor mechanics, the hands will seek the path of least resistance (a straighter hand-path). Although the hitter may find a straighter hand-path quicker and easier at first, he will also find less production.
> 
> Rql, I will respond to your lower-body/batspeed question tomorrow. 
> 
> Jack Mankin

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