action ratios

[David Love]

If you're asking me to posit that as a general rule, I'm not ready to do
that.  That has been the nature of my recent inquiries.  I can only say that
at this time that for this piano that was the case.  That there is a
relationship between the action ratio and how the action regulates shouldn't
come as any real surprise.  Whether or not there are other mitigating
factors is part of the question.

David Love


----- Original Message -----
From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
To: "Pianotech" <pianotech@ptg.org>
Sent: November 01, 2002 10:06 AM
Subject: Re: action ratios



So I understand this to say that a piano with a 5.3 ratio will necessarily
have
insufficient jack escapment at 10 mm dip and 44 mm blow ?... just trying to
get
to what all this boils down to.

RicB

David Love wrote:

> Not enough dip, no aftertouch, insufficient jack escapement.  Lower ratios
> will require more dip or less blow.
>
> David Love
>
> I was more curious about the connection you make between "bobbling" and
the
> Ratio. What exactly was causing the bobbling in your determination ?
>
> RicB
>
> >
> >>The piano I mentioned above which had a ratio of 5.3 and high zone SW's
was
>
> > regulated at 10mm dip/44 mm blow.It was bobbling all over the place.
The
> dip required to solve the
> >problem was not acceptable to the pianist.



--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html


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