Shanks parallel to strings

[Phillip Ford]

>The formula for center of percussion is:
>
>CP = I / Mr
>
>Where I would be inertia of hammer and shank assembly about the axis of
>rotation
>M is mass of the hammer and shank assembly
>r is distance to center of mass of the assembly
>
>Phil Ford

A couple of clarifications here:

r is distance to center of mass of the assembly from the axis of rotation.

The axis of rotation in our case is the hammer flange center.

PF