Key Leads and Inertia

[Cy Shuster]

That's what Newton Hunt wrote in 1998 on this:

https://www.moypiano.com/ptg/caut.php/1998-September/000822.html

Here's another aspect of this fascinating dynamics discussion: the effect of
the shape of the fulcrum under the key.  Dr. Chuang says that the rounded
support under the key bushing (in S&S) moves the fulcrum towards the
pianist's finger as the key moves downward, lengthening the back of the
lever.  Is this effect significant?

http://members.aol.com/Mccc8888/chapter1.htm

--Cy Shuster--
Rochester, MN

----- Original Message -----
From: "Classic Touch Ent" <classictouchent@comcast.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Thursday, May 01, 2003 12:40 PM
Subject: Re: Key Leads and Inertia


> Hello again,
>
> I'm wondering if the concept of accelerated action has less to do with
> the downstroke (less inertia to overcome on a high velocity strike)
> than with the return (with the weight(s) closer to the balance pin they
> are less effective counterbalancing the stack mass- potentially a
> quicker return). I guess it has a perceived overall benefit on both
> sides of the keystroke?
>
> Rich