<head><style>body{font-size:10pt;font-family:arial,sans-serif;background-color:#ffffff;color:black;}p{margin:0px;}</style></head><body><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Geneva; min-height: 16.0px">HI David,<span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; "><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Geneva; min-height: 16.0px"><br></p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Geneva; min-height: 16.0px">I'll weigh in by saying that I don't put much confidence in single measurements to draw statistical conclusions from measured data. Averaging multiple measurements will give a more certain picture of what is real. As for distance ratio I prefer to rely on direct measurement methods... When comparing weight to distance I measure to the same point 13mm in from the front of the top of the key for both types of measures.</p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Geneva; min-height: 16.0px"><br></p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Geneva; min-height: 16.0px">David S </p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Geneva; min-height: 16.0px"><br></p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Geneva; min-height: 16.0px"><br></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Arial">-----Original Message-----<span style="font: 12.0px Geneva"><span class="Apple-tab-span" style="white-space:pre"> </span></span></p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Arial"><br></p><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Arial">>From: David Love <davidlovepianos@comcast.net></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Arial">>To: pianotech <pianotech@ptg.org></p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Arial">>Sent: Tue, Jan 15, 2013 5:56 pm</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Arial">>Subject: [pianotech] Measuring Action Ratios</p>
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<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>When analyzing actions I've used both the gauge for measuring key travel</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>versus hammer travel as well as the actual measuring and multiplying out the</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>three separate lever arms. So far, they've been fairly close. However,</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>today I was measuring a MH A and the gauge gave me a AR of 5.2 whereas the</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>measuring of the three arms gave me 5.9. Curious. Assuming I'd measured</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>incorrectly I remeasured several times and got the same result. When using</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>the numbers to calculate via the Stanwood method the predicted balance</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>weight/front weight/strike weight relationships the 5.9 was clearly the more</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>accurate number. At a bit of a loss to explain it so, for the moment, all I</p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>can do is report it. </p>
<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier; min-height: 16.0px"><br></p></td></tr></tbody></table></span><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; "><table width="901.0" cellspacing="0" cellpadding="0" style="width: 901.0px; background-color: #ffffff; padding: 2.0px 2.0px 2.0px 2.0px"><tbody><tr><td valign="middle" style="width: 901.0px; padding: 0.0px 5.0px 0.0px 5.0px"><p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 13.0px Courier">>David Love</p>
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