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<DIV><FONT face="Verdana Ref">The book Del Fandrich recently edited and
reprinted covers this:</FONT></DIV>
<DIV><FONT face="Verdana Ref"><A
href="https://www.ptg.org/store/product_info.php?cPath=25&products_id=135">https://www.ptg.org/store/product_info.php?cPath=25&products_id=135</A></FONT></DIV>
<DIV><FONT face="Verdana Ref"></FONT> </DIV>
<DIV><FONT face="Verdana Ref">--Cy--</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=KeyKat88@aol.com href="mailto:KeyKat88@aol.com">KeyKat88@aol.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, April 25, 2007 4:01
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Plate load- piano engineers know
this?--how?</DIV>
<DIV><BR></DIV>
<DIV>Greetings, </DIV>
<DIV> </DIV>
<DIV> Is there any way to view
exactly how stringing a piano effects the stress on the harp plate? For
example, if you had an unstrung plate and only strung the bass would it have
any compressive or tensile stress effect/changes on the high treble section of
that plate and visa-versa ; stringing only the high treble...effects bass
section of plate? </DIV>
<DIV> </DIV>
<DIV> What if you only
strung the center, would that have any effect on either bass or treble end or
both? How can I get an idea of what are those stresses are and is there
any way they can be viewed graphically or measured throughout the
casting? </DIV>
<DIV> </DIV>
<DIV> Is the only
way we know that the stresses are present is by how the piano
behaves during a pitch raise? And how do we separate/differentiate what
forces are happening in the plate, as opposed to what stresses
are absorbed by the bridges and the force they are either releiving
or transferring off the plate to themselves or elsewhere in the instrument,
i.e. transfered to the sound board and/or case and/or
rim? Do piano companies' R&D have a way of testing these things? If
so how?</DIV>
<DIV> </DIV>
<DIV>Thanks in advance,</DIV>
<DIV>Julia Gottshall</DIV>
<DIV>Reading, PA</DIV><BR><BR><BR>
<DIV><FONT style="FONT: 10pt ARIAL, SAN-SERIF; COLOR: black">
<HR style="MARGIN-TOP: 10px">
See what's free at <A title=http://www.aol.com?ncid=AOLAOF00020000000503
href="http://www.aol.com?ncid=AOLAOF00020000000503" target=_blank>AOL.com</A>.
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