rear string lengths - APRON

[Paul Tizzard]

Hi Del,

If you have the time, I would appreciate a copy. 
Thanks.

Paul Tizzard
S. Africa
ptizzard@mweb.co.za


----- Original Message ----- 
From: "Delwin D Fandrich" <pianobuilders@olynet.com>
To: <oleg-i@wanadoo.fr>; "Pianotech" <pianotech@ptg.org>
Sent: Friday, December 06, 2002 10:44 PM
Subject: Re: rear string lengths - APRON


Re: rear string lengthsAh, Isaac, how could you have possibly missed one of my many tirades against the use of bridge cantilevers (a more descriptive word than apron)? I've written about these atrocities numerous times. 

There is never a good reason for incorporating these hideous devices into a piano design, large or small. They can always be designed out of the system. It all started with the equally bad notion that the speaking length of A-1 must always be as long as possible -- especially in short pianos.

I've not time just now but I'll look up one of the pieces I've written and email it to you privately along with a drawing that illustrates the stresses these things place on the soundboard.

Del


  ----- Original Message ----- 
  From: Isaac OLEG 
  To: Pianotech 
  Sent: December 06, 2002 11:23 AM
  Subject: RE: rear string lengths - APRON


  Is 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