> Does the plate "flex" or "compress"...well yes without a doubt it does.... >to some extent......... the question is 'which way'? Hi Jim, Over generalization, Upwards I would say, thats why so many pianos have nose bolts. Some pianos use just a plain lag bolt, others, the more stable clamp type lag bolt. Working out all the tortional stresses in a piano plate is highly complex, since the turning moments of force is running in several different directions. ( String lay out and over stringing) Your thought's on pitch and static friction, is probably correct. But any calculation of static friction would just be a a calculated guess, since we are putting the string into motion, Is this enough to break static friction? From Ron. O's Experience of tuning rear duplexes, I think it may be. His observation is that it takes 6months with regular tunings to reach this state. So another question. As the string takes on a set, (bend around the pins). Is the tansverse and longditudinal modes of the strings changing, due to the bends? Thereby helping string rendering. Now I crawl back under my rock, since I am at a loss. Roger
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