rear string lengths - APRON

[Isaac OLEG]

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Re: rear string lengthsIs not the use of an apron (suspended bass bridge)
and short back scale allow for maximum string length on shorter grand's.?

Then, may the bearing be apparently higher ? (because the actual pressure of
the bridge on the soundboard is in fact far away from the pins ?

The little Gaveau I have in mind here is having a lot of bearing apparently
on the bass bridge, but there is an apron, and it does not seem to lock the
system.

regards.

Isaac OLEG




  -----Message d'origine-----
  De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la
part de Delwin D Fandrich
  Envoyé : vendredi 6 décembre 2002 01:38
  À : Pianotech
  Objet : Re: rear string lengths



    ----- Original Message -----
    From: David Love
    To: Pianotech
    Sent: December 05, 2002 4:24 PM
    Subject: Re: rear string lengths


    Should the backscale length be taken into consideration when setting
down bearing?  Since a shorter backscale doesn't allow as much freedom of
movement for the bridge, would you, then, consider reducing the bearing on a
piano, or section, that had a shorter backscale, and vice versa?  Is there
some formula or general rule of thumb for this.

    David Love

      Yes. Conventional wisdom tells us to set bearing very light in the
bass. This is why. With the extremely short backscales commonly found in the
low bass of modern pianos setting any kind of string deflection is going to
tie the bridge/soundboard assembly down completely.



      With a backscale as shown above normal string bearing -- in this case
about 0.5º string deflection -- is not only possible, but necessary.

      Del

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