Killer Octave Question - one of those Erards !

[JAMES DALLY]

Je suis interresant..........merci ( learning, correct as needed, merci  Jim

Dally
----- Original Message -----
From: "Isaac OLEG" <oleg-i@wanadoo.fr>
To: "Pianotech" <pianotech@ptg.org>
Sent: Tuesday, April 29, 2003 3:07 AM
Subject: RE: Killer Octave Question - one of those Erards !


> Hello,
>
> If some are interested, I have some pictures of a simple Down bearing
> gauge showing front and back bearing on a 1907 Erard (OK a straight
> strung one)- have a nice 3 or 4 mm crown.
> The piano was located under a glass roof for many years, have a very
> large crack, and ribs un glued.
>
> Does not prove much (and was of course ribbed with crowned ribs at
> this time I guess)
>
>
> But still a very nice tone
>
> Best to all
>
> Isaac OLEG
>
> Entretien et reparation de pianos.
>
> PianoTech
> 17 rue de Choisy
> 94400 VITRY sur SEINE
> FRANCE
> tel : 033 01 47 18 06 98
> fax : 033 01 47 18 06 90
> cell: 06 60 42 58 77
>
> > -----Message d'origine-----
> > De : pianotech-bounces@ptg.org
> > [mailto:pianotech-bounces@ptg.org]De la
> > part de A440A@aol.com
> > Envoye : jeudi 10 avril 2003 02:44
> > A : pianotech@ptg.org
> > Objet : Re: Killer Octave Question
> >
> >
> > Greetings,
> >    The killer octave is usually supported by the section of
> > belly rail that
> > is farthest from buttressing.  The normal connection of the
> > plate to the
> > belly rail at the plate's "horn" provides resistance to
> > outward movement, and
> > the rails connection to the case at the treble end,
> > likewise.  However, the
> > ribs that must support crown under the killer octave bear
> > against the
> > bellyrail at its greatest unsupported span and it just
> > might be one reason
> > that this section of the piano loses its bearing first.
> > (The rib under the
> > C5 on a Steinway O meets the bellyrail approx. halfway
> > between the plate horn
> > and the treble end of the rail).
> >    Many other reasons could go into the equation, too.
> >
> > Ed Foote RPT
> > www.uk-piano.org/edfoote/
> > www.uk-piano.org/edfoote/well_tempered_piano.html
> >
> > _______________________________________________
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> >
>
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