Fw: Steinway key humping

[Michael Gamble]

Hello Cy
The S&S has these inverted mushrooms growing thru' the keyframe. This
minimises the friction. Agree?
Regards
Michael G (UK)
----- Original Message ----- 
From: "Cy Shuster" <741662027@charter.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: Monday, October 20, 2003 4:00 AM
Subject: Re: Steinway key humping


>
> ----- Original Message ----- 
> From: "Carl Meyer" <cmpiano@comcast.net>
> To: <pianotech@ptg.org>
> Sent: Sunday, October 19, 2003 7:57 PM
> Subject: Steinway key humping
>
>
> > I recall when I first heard that, I was impressed with that concept.  I
> have
> > been now convinced that to misadjust to compensate for wear is not a
> logical
> > engineering decision.
>
> Thank you, Carl.  It makes no engineering sense to me, either.  Why not
> adjust letoff closer in the middle to adjust for hammer felt wear, etc.
etc.
> etc.?
>
> Is it the actual keybed that's crowned in Steinways?  Doesn't that add
> friction to una corda shifting, or is it an arc of a circle and stay in
> contact the whole way during a shift?
>
> And if you do put a 2mm crown in the center, over how many keys do you
> spread it out: an octave centered on middle C, perhaps?  Two octaves?
>
> --Cy Shuster--
> Rochester, MN
>
>
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