[pianotech] capstain/wippen angle, was: key position at rest

[erwinspiano at aol.com]

ZZZZZaaaaaactly
  D.S.E.


-----Original Message-----
From: V T <pianovt at yahoo.com>
To: pianotech at ptg.org
Sent: Mon, 16 Mar 2009 3:54 pm
Subject: [pianotech] capstain/wippen angle, was: key position at rest




 think this is a case where two parameters are available for optimizing. One is 
riction, and the other is the action ratio. However, the question is which of 
he two is more important to optimize?
We can minimize the friction during the stroke, as Ron Overs did. This actually 
ilts the capstan in the opposite direction from what S&S did. Alternatively, we 
an explore if there is some benefit to a ratio that changes as a function of 
ey position. When I last looked at Steinway’s tilted heel/capstan geometry, I 
oncluded that the design intent was a changing ratio rather than minimal 
riction. This may very well be the biggest “secret” of the so-called 
ccelerated action.

     

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