Steinway key humping

[Cy Shuster]

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Now, this makes more sense -- more in the realm of "a three-legged stool =
never rocks" (or knocks, in this case). =20

Assuming that the keys move to the right when the una corda pedal is =
depressed, are you saying that the left end glides move up the tapered =
area like a ramp, lifting the center section?  If that's the case, why =
is the right side also tapered down?  Wouldn't that cause the glide on =
the right side of the keyboard to descend its ramp, thus tilting the =
keyboard off level, and also keeping the middle section from lifting up? =
 Or is that "as designed", to prevent knocking (which might be unlikely =
during pp play with una corda, anyway)?

--Cy Shuster--
Rochester, MN

"In theory, theory and practice are the same.  In practice, however, =
they are different."
  ----- Original Message -----=20
  From: Tompiano@aol.com=20
  To: pianotech@ptg.org=20
  Sent: Tuesday, October 21, 2003 7:21 AM
  Subject: Re: Steinway key humping


  I recently was attended one of the Steinway factory seminars and this =
issue came up quite often. According to Eric Schandal the front rail =
area of the keybed is flat accept for the extreme left and right areas =
which is tapered down. This concept was designed to add pressure to the =
end glides, which in turns helps lifts the middle area of the keyboard =
push upwards. The bottom line is to create a counter pressure against =
the weight of the keyboard allowing for an easier shift.
  The back rail area of the keybed is completely flat. However, the =
center cavity is sculpted downwards.
  Also noted was that the 3 main panels are free floating and are not =
glued.=20
  Tom Servinsky 
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