<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html>   "Delwin D. Fandrich" wrote: Sigh. It's back to the Journal again. Only at pianissmo is there a direct relationship between the motion of the key end and the hammer. Since this is typically what we see at the regulating bench we make the asumption that this is what occurs in the piano under normal play. In fact as one approaches forte the key motion precedes that of the hammer by an increasing amount. Indeed, in a typical "modern" concert grand the keys in the bass up through the mid-range will have fully bottomed somewhat before the hammer begins to move. From that point on energy is moving through the system and is being delayed by the compression and flexing of the various action components. At this point there is no longer any hope for subtlty. <blockquote TYPE=CITE>Del</blockquote> Hence the querrie I made about the "left over" force that could possibly cause an accelleration of the hammer after the actual and direct force of the key has been removed. After several posts I think we all have gotten the point that there has to be a force to accelerate/deaccelerate and object. Yet none of these have really addressed the origional query satisfactorilly, tho a couple have mentioned lightly the below. What I'd be curious to know,  is if and when the flexing of action parts can cause such an acceleration. Thanks Del RicB     Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway <A HREF="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A> <A HREF="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broadpark.no/~rbrekne/ricmain.html</A>  </html>