<HTML><HEAD> <META charset=US-ASCII http-equiv=Content-Type content="text/html; charset=US-ASCII"> <META content="MSHTML 6.00.2800.1106" name=GENERATOR></HEAD> <BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #ffffff"> <DIV> <DIV>Greetings,</DIV> <DIV> </DIV> <DIV>             So how do I start making measurements to see what weight a key(s) neeeds?  How do I measure friction? I am guessing that I should start  by measauring the the foot-lbs (or cm-grams?)  inertia it takes to start the power stroke at the wippen heel/foot. Then I have measured my fricion...right? Then I can do the uw/dw calculations.</DIV> <DIV> </DIV> <DIV>Julia </DIV> <DIV>Reading. PA</DIV> <DIV> </DIV> <DIV>In a message dated 2/16/2008 11:27:46 PM Eastern Standard Time, fmurray@cruzio.com writes:</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT face=Arial size=2>Given a certain friction in the piano we are going to want to set up something like maybe a downweight (dw) of 50 and an upwight (uw) of 25. All numbers in grams. This is assuming a friction of 12.5.</FONT></BLOCKQUOTE></DIV> <DIV></DIV><BR><BR><BR><DIV><FONT style="color: black; font: normal 10pt ARIAL, SAN-SERIF;"><HR style="MARGIN-TOP: 10px">Delicious ideas to please the pickiest eaters. <A title="http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/2050827?NCID=aolcmp00300000002598" href="http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/2050827?NCID=aolcmp00300000002598" target="_blank">Watch the video on AOL Living.</A></FONT></DIV></BODY></HTML>