At 8:03 AM +0200 5/23/03, Stéphane Collin wrote: >I thought of a cheaper solution. >When I get my super Mitutoyo multi anvil micrometer, and when I will >be able to measure diameters up to hundredth of a millimeter, I will >pull the strings up until they break, recording accurately which >frequency the string reached just before breaking. Putting the >announced breaking tension of steel wire into the equation, I will >be able to measure the string length for the cost of approximately >30 cm to 4 m of that wire. >But then again, my original wire is shot. "...had to amputate the patient's head to relive his migraines" <g> How 'bout this for non-invasive, non-destructive. Place a keylead of known mass in the middle of the speaking length. Record the string's deflection under load. Using trigonometry, calculate the speaking length for which a wire at a known pitch would deflect under a known load by the observe amount. Anybody else have more clever and thoroughly original ideas about how to avoid using a ruler? But Stephane, I can think of a piano or two whose string lengths need to be measured as you propose. <g> Mr. Bill "Lady, this piano is what it is, I am what I am, and you are what you are" ...........From a recurring nightmare. +++++++++++++++++++++
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