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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=Erwinspiano@aol.com
href="mailto:Erwinspiano@aol.com">Erwinspiano@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> September 24, 2003 7:57 =
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Heavy Hammers / =
High
Ratio</DIV>
<DIV><BR></DIV>
<DIV>
<DIV>In a message dated 9/24/2003 12:42:30 AM Pacific Daylight Time, =
<A
=
href="mailto:Richard.Brekne@grieg.uib.no">Richard.Brekne@grieg.uib.no</=
A>
writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px =
solid"><FONT
face=Arial>Hi folks..<BR><BR>Been thinking about this =
particular
action configuration a bit and have<BR>a few questions swimming =
around in my
mind. Configuring an action such<BR>that it has heavy hammers with a =
high
ratio is going to cause the need<BR>for lots of counterbalancing... =
and
quite often ends up being in the<BR>form of strong somewhat randomly =
regulated assist springs. This<BR>combination of high ratio, high
hammermass, and low key mass has on the<BR>surface of it a couple
interesting features. Its essentially the only<BR>way you can =
achieve high
top action inertia against low key inertia<BR>while providing high =
hammer
acceleration for key acceleration.... which<BR>further expands the =
ratio of
hammer for key inertia. It would also seem<BR>to provide for the =
greatest
change in required finger force =
(ie<BR><<heaviness>>) from
ppp to fff play.... and perhaps thats not such a<BR>bad thing
????<BR><BR>Assuming one took the time to do a bang up job of =
evening out
strike<BR>weights and key leading... and real even assist spring
adjustments....<BR>what are the downsides of this setup
?<BR><BR>RicB</FONT></BLOCKQUOTE></DIV>
<DIV><FONT face="Times New Roman" color=#000040> <FONT =
size=5>Flat
knuckels from high hammer weight?</FONT></FONT></DIV>
<DIV><FONT face="Times New Roman" color=#000040 size=5>
Dale</FONT></DIV>
<DIV><FONT face="Times New Roman" color=#000040 =
size=5></FONT> </DIV>
<DIV><FONT face="Times New Roman" color=#000040 size=5>Increased =
wear &
tear on the hammershank action centers?</FONT></DIV>
<DIV><FONT face="Comic Sans MS" color=#000080 =
size=3>
Del</FONT></DIV></BLOCKQUOTE></BODY></HTML>