Hey there boys... Correct me if I am wrong.. but arent we mixing up the hammers orientation to the string with the direction of the crowns momentum again ? Jims point went to that latter, not too whether or not the hammer itselft is square (perpendicular) to the strings. Grin.... RicB Roger Jolly wrote: > > > > > >In a real piano, be it grand or vertical, in > > > today's world, there is no > > > way > > > >to make the crown of the hammer hit the string in a > > > perfectly > > > perpendicular > > > >direction. You just can't do it..... > > > > > > > >Sincerely, Jim Ellis > > Hi Jim, > Absolutely correct. Depending on the inertial of a given > hammer, and the force of the blow, it causes the shank to first bend, > before the hammer is set in motion. > SloMo studies of action parts conclusively show that the hammer rarely hits > the string square on. > The whip lash of the shank, will cause the hammer to slightly over or under > centre. > > Regards Roger > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html
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