Grin... prodding is what I do best me thinks... so let me prod once more. You seem to make the clear statement that internal friction moments are critical to the sound resulting in the piano when a felt hammer hits the strings.... tho you dont go much into detail as to the hows/whats/whys... perhaps understandably so... but since this tangent of the discussion seems intent on comparision (for not to say competition) between <<lacquered up>> and <<needled down>> hammers it seems central to ascertain whether or not either approach results in anything particularilly negative in relationship to this internal friction capacitance The following quote from Bernhards last claims authority on a a related issue of this subject matter... "Measurements on hammers parameters has been done by Anatoli Stulov, where he measured felt stiffness and rebound time.He found differences of a factor of about 100 % in the rebound time between different new hammer sets made by diverse makers. (Abel, Renner, Imadegawa) The rebound time is in correlation with the felts /inner friction losses/ (or imaginary part of elastic modulus) , not to /stiffness/. Which states outright that rebound time is not correlated to hammer stiffness. So my prodding leads me to ask do you agree with the quote... and would you say that the addition of lacquer has any affect on this internal friction, and if so what... and the same question again with respect to needling. Cheers RicB
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