It's simply a guideline. The maximum also does not suggest that inertia problems suddenly begin once you exceed the maximum. Adding weight adds progressively more inertia until at some point it becomes objectionable. That subjective line will vary. As is usually the case, it's a bell shaped curve. I personally prefer a maximum a bit lower than this; around 80% of the published maximum, and I am content with a correspondingly lighter strike weight or hammer. Matching the exact curve is not that important as long as it's a smooth curve. Encroaching on or exceeding the maximum is less of a problem at the top of the action where there is less mass in the hammer and, therefore, less overall lead in the key, than at the bottom. David Love davidlovepianos@earthlink.net > There is no where any real documentation that I am aware of that justifies any > precise assumptions about Maximum FWs. Indeed... I would think that given the > variance possible in key inertia for same FW... such a table would be in the > end less then usefull to begin with. In anycase... todays maximum table is to > no small degree a subjective opinion... which means any assumptions about what > SW is appropriate for any given SWRatio is also equally subjective. > > That being said... there is also a good deal of experience and data that lies > behind that subjective opinion.... so untill we get further with figuring in > Key inertia into this picture.... its a good reference table. > > Cheers > RicB > > > -- > Richard Brekne > RPT, N.P.T.F. > UiB, Bergen, Norway > mailto:rbrekne@broadpark.no > http://home.broadpark.no/~rbrekne/ricmain.html > http://www.hf.uib.no/grieg/personer/cv_RB.html >
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