Touchweight Metrology Question

[David Love]

Bill:

My impression is that Stanwood only chooses an even FW line (inertial
resistance) when he can make the BW even with the use of assist springs to
compensate for leverage variations.   Given the choice of smooth FW and
uneven BW (no assist springs), or smooth BW and uneven FW, does he still opt
for uneven BW?  I would personally choose even BW since inertia is related
to acceleration.  Small variations in inertia would be maximized only during
higher acceleration, or louder playing.  This type of touch would be less
sensitive to those variations.  On the other hand, unevenness in BW would be
most perceptible at pianissimo levels when differences in inertia due to
lower acceleration would be minimized.  The pianists perception of eveness
would be greater in this case with even BW.


David Love


----- Original Message -----
From: "Bill Ballard" <yardbird@pop.vermontel.net>
To: <pianotech@ptg.org>
Sent: May 19, 2002 12:25 PM
Subject: Re: Touchweight Metrology Question
>we do have to face the choice
> between an even FW line (inertial resistance) or an even BW line
> (even gravitational resistance). David Stanwood, with his years of
> observation and experience, choses even inertial resistence.