This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Wood grains are rice-shaped, and swell like them with moisture, getting = fatter rather than longer. Thus the soundboard and bridge push up = against the strings, raising tension, and then shrink down again. Ron = N. had a great presentation at Nashville showing that the bridge alone = pushes up the strings by, what, a 1/16"? I use the guitar analogy of = bridge and top to piano bridge and soundboard, and that seems to help. The inevitable loss of tension is just the Second Law of Thermodynamics: = everything trying to go to maximum entropy. Even without tuning pins = turning, the pinblock wood crushes, grooves are made in the capo bar, = bridge pins are forced upright (or out!), etc., etc. 150 pounds of = tension per string * 250 strings is around 15 tons of tension, so it's a = big number to deal with. That's why the 500 pounds of cast iron is = there. --Cy Shuster-- Bluefield, WV ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/3f/bd/a9/27/attachment.htm ---------------------- multipart/alternative attachment--
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