<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On Apr 9, 2011, at 10:59 AM, John Delacour wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>At 09:22 -0400 09/04/2011, Cliff Lesher wrote:<br><br><blockquote type="cite">I guess I'd suggest checking the bearing points before visiting Young's modulus.<br></blockquote><br>There's no need to "visit Young's Modulus".  By far the most common reason for breaking strings is excessive tension and to calculate the tension of the string all you need is a common or garden pocket calculator, as you will read at the link I provided in my previous message.<br><<a href="http://pianomaker.co.uk/technical/string_formulae/">http://pianomaker.co.uk/technical/string_formulae/</a>><br><br>The tension in pounds is calculated by punching in the following:<br><br>   l x f x d x = Ö 20000 =<br><br>where l is the length in CENTIMETRES and f is the frequency in cycles per second and d is the overall diameter in CENTIMETRES.  I repeat centimetres, NOT millimetres.<br><br>It is so simple that it seems to me very silly not to do this first.<br><br>JD<font class="Apple-style-span" color="#000000"><font class="Apple-style-span" color="#144FAE"><br></font></font></div></blockquote><br></div><div>Wow,</div><div><br></div><div>Check out the size of the brain on this guy!  How impressive!</div><div><br></div><div>Thanks for the entertainment.</div><div><br></div><div>Cliff Lesher</div><div>Winfield, PA</div></body></html>