<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.2900.2912" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Hi Terry and Phil,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Great experimemting and I like the Overs-like reverse angle capstan. Might fooling around with the spread give you some options on the geometry and touchweight? I've always been afraid to make such a tall heel although I've encountered some set-ups where something like that might have been called for. How does the note regulate as far as dip, hammer blow, jack in window clearance? I guess the proof will be in the pudding so keep us informed.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV>Jude Reveley, RPT<BR>Absolute Piano Restoration, LLC<BR>Boston, Massachusetts</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=mfarrel2@tampabay.rr.com href="mailto:mfarrel2@tampabay.rr.com">Farrell</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> Monday, July 17, 2006 6:02 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> 1890s WNG Action Geometry</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial size=2>Phil Bondi and I dove into an 1890s WNG action from a 6' 4" Knabe today to try and straighten out some basic action geometry. We haven't got all the kinks worked out yet, but we seem to be getting there. With only a large capstan move and removal of a couple leads, we went from an action ratio of over 6.0 down to 4.9. DWs went from 60+ to 50 and less (I know, too light) and BW in the 36 to 40g range. We have a lot of work to do yet, but it seems the capstan move described below has gotten us into the right ball park anyway.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Most notable was a very large capstan move that we will likely keep (unless someone so kindly informs us of a potential problem the change might induce). The photo below shows the original capstan in the background. The forward key had its capstan moved 10mm forward and 11mm lower. The middle key had its capstan moved 13mm forward and 12mm lower. The second photo shows the modified wippen heel. These lower positions put the capstan right on the magic line at half blow. The capstan/wippen heel interface went from a traveling, grinding, sliding affair and a note with 17g friction to a perfectly interfacing union with no apparent sliding and a note with 9g friction. We were amazed at the improvement in friction and interface movement.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>This strikes me as a rather drastic capstan move. Has anyone else run across an action that needed such a large capstan move? As our action ratio is down to 4.9 and key ratio is down around 4.8 with the 10mm forward capstan migration, we may move it back just a few millimeters. But still it seems large. Is there some hidden pitfall I'm not seeing? Comments?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><IMG alt="" hspace=0 src="cid:00d401c6aa07$cd861f90$6601a8c0@D12RK691" align=baseline border=0></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><IMG alt="" hspace=0 src="cid:00d501c6aa07$cd861f90$6601a8c0@D12RK691" align=baseline border=0></DIV></BLOCKQUOTE></BODY></HTML>