This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Consider the traditional method of measuring downweight and upweight. = These are not static measurements. Part of taking good measurements = involves developing the skill of recognizing equal speeds of hammer = rise. And there is also that bump to overcome friction, and the = velocity must be great enough to continue overcoming friction. Some = part of this measurement is M.O.I. dependent on velocity. Add a few = grams to the measuring weight, and the hammer rises faster. Bass = hammers tend to be slower to rise, and need a bigger bump. Treble = hammers often need little or no bump. Does the compression of parts by = the heavier hammer produce more friction, and that's all the difference, = or is part of the difference due to the inertial mass of the larger = hammer? In practice, it seems to me that bass hammers with wippen assist springs = rise more easily (with less bump) than bass hammers without wippen = assist springs, though I've not made direct comparisons. Anybody else = see it that way? Thinking of Isaac's posts.... About 2 years ago I rebuilt a D action = using wippen assist springs. It went to a small college with 2 piano = prof's. One plays Schubert Impromptus and Mozart Sonatas with (to my = ear) articulate, melodic phrasing and wonderful sensitivity to the color = response of the piano, obviously listening to the piano as she plays. = She's a real technician's delight! The other plays Chopin Etudes as loud and fast as possible, (to my ear) = with no musical effect at all. The Schubert player loves the action. = The Chopin pounder says; "I don't know. Somethings wrong. The bass is = too light, the treble's too heavy. Or I don't know what it is, but it = never feels the same." =20 Fortunately the Schubert player is the senior faculty member! The = Chopin player practices on a worn out B with heavy bass, light treble. = Now I wonder if my work to reduce the amount of lead in the bass keys = has thrown him for a loop. Perhaps, as Isaac describes, he is used to = having that weight to help control the key in the furious music he = plays. I'll be quiet now; forget pianos and go take a kid to ride a horse... Ed S. ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/81/70/ef/06/attachment.htm ---------------------- multipart/alternative attachment--
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