<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD><TITLE>Re: rear string lengths</TITLE> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <STYLE type=text/css>BLOCKQUOTE { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } DL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } UL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } OL { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } LI { PADDING-BOTTOM: 0px; PADDING-TOP: 0px } </STYLE> <META content="MSHTML 6.00.2600.0" name=GENERATOR></HEAD> <BODY bgColor=#ffffff> <DIV><FONT size=2>We don't have the luxury of that much backscale = length on the standard S&M, I mean S&S where zero bearing is the usual target.   I assume that is one of yours.  I am curious = about the bearing in the treble section as it relates to backscale length.  Minimizing the bearing in the bass is something I am aware of for the = reasons you mention.  But what about in the treble.  Would you = consider modifying the bearing there depending on backscale length?  And = back to the question posted earlier and addressed to some degree by Ron O., what is = the ideal backscale length for each section?  How much must the = backscale length deviate from the ideal length before you would consider modifying = the bearing (if you would)?</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>And something else I've always wondered about, why, = on many pianos,</FONT><FONT size=2> do hitch pins in the treble and tenor of = many pianos not follow the curve of the bridge, but seem to go in a zig zag sort of pattern? </FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>David Love</FONT></DIV> <BLOCKQUOTE dir=ltr 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=pianobuilders@olynet.com href="mailto:pianobuilders@olynet.com">Delwin D Fandrich</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> December 05, 2002 4:38 = PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: rear string = lengths</DIV> <DIV><BR></DIV> <DIV><FONT face="Comic Sans MS" color=#000080></FONT> </DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000080 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=davidlovepianos@earthlink.net href="mailto:davidlovepianos@earthlink.net">David Love</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> December 05, 2002 4:24 = PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: rear string = lengths</DIV> <DIV><BR></DIV> <DIV><FONT size=2>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.</FONT></DIV> <DIV><FONT size=2></FONT> </DIV> <DIV><FONT size=2>David Love</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial"><FONT face="Comic Sans MS" = color=#000080 size=3></FONT> </DIV> <DIV style="FONT: 10pt arial"><FONT face="Comic Sans MS" = color=#000080 size=3>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 <EM>modern</EM> pianos setting any kind of string deflection is going to tie the bridge/soundboard assembly down = completely. </FONT></DIV> <DIV style="FONT: 10pt arial"><FONT face="Comic Sans MS" = color=#000080 size=3></FONT> </DIV> <DIV style="FONT: 10pt arial"><FONT face="Comic Sans MS" = color=#000080 size=3><IMG alt="" hspace=0 src="cid:006b01c29cc2$c3503fc0$a4020fce@concentric.net" = align=baseline border=0></FONT></DIV> <DIV style="FONT: 10pt arial"><FONT face="Comic Sans MS" = color=#000080 size=3></FONT> </DIV> <DIV style="FONT: 10pt arial"><FONT face="Comic Sans MS" = color=#000080 size=3>With a backscale as shown above normal string bearing -- = in this case about 0.5º string deflection -- is not only possible, but necessary.</FONT></DIV> <DIV style="FONT: 10pt arial"><FONT face="Comic Sans MS" = color=#000080 size=3></FONT> </DIV> <DIV style="FONT: 10pt arial"><FONT face="Comic Sans MS" = color=#000080 = size=3>Del</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></= HTML>