Keys and MOI

[Richard Brekne]

Nicely put Jim. I find myself once again in 100% agreement with you.

Cheers
RicB

James Ellis wrote:
> 
> Hey Fellows,
> 
> I'm getting confused as to who said what, but I'll say this, and I think it
> will be very close to what Richard said in his latest post.  I might change
> the emphasis a little bit.
> 
> If you start with evenly graduated hammer-head weights, and you are
> consistent with the shanks you use, then you will automatically have evenly
> graduated strike weights.  If you are then consistent with the other action
> parts and geometry you use, and you weigh off the keys for even balance
> weights, and you are consistent in the way you weigh off the keys, then you
> will automatically have evenly graduated moments of inertia in the action.
> The main factors determining what that will be are, 1) the hammer head
> mass, 2) the action geometry.  The masses of the other parts of a common
> piano action have less effect on the total MOI.
> 
> If you want to feel what the MOI of the action feels like, that's easy to
> do.  Simply do some rapid repeats down on key #1, and then do the same
> thing on key #88.  If your balance weitght is consistent, and nothing is
> sluggish, the big difference you feel will be the difference in the MOI.
> It's just that simple.
> 
> Jim Ellis
> 
> _______________________________________________
> caut list info: https://www.moypiano.com/resources/#archives