Hello all. I need some help understanding upright touchweight. Ive searched the archives, with little gain. I redesign grand touchweight on a regular basis: leverage, friction and mass. The wonderful results I gain there leads me to want to understand the upright action better, especially for the sake of many gifted students who lack the resources to invest in a grand. For example, a Samick upright, JS 115: Downweights 40-45gr Upweights 30gr Keyleads Bass 1 lead, 2 behind balance rail Mid 1 lead at back of key Treb 2 leads at back of key My biggest question: Is it possible to widen the difference between the DW and UW (friction), or do you just shoot for an acceptable Balance Weight? What do you do about the inertia of the keys? For feel, we should have more inertia in the bass than in the treble. It should be contiguous, therefore the butt springs would have to be adjusted after the keys are leaded. Ive considered double-leading the key (front and rear) to increase inertia in the bass without affecting the static touchweight, but would that affect repetition speed? Many more thoughts and questions on the subject, but this would be a good beginning. Thanks. John Tonyan _________________________________________________________________ Dave vs. Carl: The Insignificant Championship Series. Who will win? http://clk.atdmt.com/MSN/go/msnnkwsp0070000001msn/direct/01/?href=http://davevscarl.spaces.live.com/?icid=T001MSN38C07001
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