AB Chase Concert Grand

[Delwin D Fandrich]

> -----Original Message-----
> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On
> Behalf Of Dean May
> Sent: April 05, 2004 8:02 PM
> To: Pianotech
> Subject: RE: AB Chase Concert Grand
>
>
>
> Hold on now, Bill. Don't fall asleep just yet.
>
> >>...they don't stand in line between the block and
> the hitchpin web, bracing directly against the string load. They do
> perform a "tension bracing" in that they prevent the plate struts and
> hitchpin webs from buckling upwards...
>
> First you say they don't brace against string load. Then you say they do
> prevent struts and webs from buckling upwards. Tell me what is
> the load that
> wants struts and webs to buckle upwards? Is it not the string load?


OK. The string load deflects the plate to some nominal degree. And to some
nominal degree those pianos using nosebolts that are actually adjusted
correctly do help stabilize the plate. (What about all those pianos lacking
both nosebolts and bellybracing?) But unless there is some mechanism to
couple direct string load down to the bellyrail and/or the bellybraces these
systems cannot directly support string load to any significant degree.

Del