<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN"> <HTML> <HEAD> <META content=text/html;charset=iso-8859-1 = http-equiv=Content-Type><!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 = HTML//EN"> <META content='"MSHTML 4.72.2106.6"' name=GENERATOR> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT color=#000000 size=2>Michael,  If you liken it to = tack hammers vs mallets, I would imagine the extra mass of a heavier hammer = increasing the chance of string breakage - all else being equal.   If we use = the good old basic  f = ma, extra force would be exerted to the = strings.  Yes? No?  Maybe I've overlooked something.  Brian Holden  (gidday)</FONT></DIV> <DIV><FONT color=#000000 size=2></FONT><FONT face=Arial size=2><B></B></FONT> </DIV> <DIV><FONT face=Arial size=2><B>-----Original = Message-----</B><BR><B>From: </B>M J & L V Ashby <<A href="mailto:mjashby@xtra.co.nz">mjashby@xtra.co.nz</A>><BR><B>To: = </B>Piano List <<A href="mailto:pianotech@ptg.org">pianotech@ptg.org</A>><BR><B>Date: </B>Sunday, 28 November 1999 21:32<BR><B>Subject: </B>String breakage in = relation to hammer mass<BR><BR></DIV> <BLOCKQUOTE style="BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: = 5px"></FONT> <DIV><FONT color=#000000 size=2>If a hammer is unusually heavy = will it contribute to string breakage?</FONT></DIV> <DIV> </DIV> <DIV><FONT size=2>Michael </FONT></DIV></BLOCKQUOTE></BODY></HTML>