Greetings, Vladan wrote: I think the concise explanation is that most of the inertia on the down stroke does not come from the key stick with its lead. The hammer weight is the largest single contributor. So, you might as well chip away at that first. I think I disagree with this. Inertia's effect is most profound at the momemt that movement begins. I submit that the inertia felt first, and most acutely, is from the mass of the keystick. The compliance in the action is such that the key is moving well before the hammer. In some power-saturated actions, the key will actually touch the pad before the hammer is half-way to the string. The resistance to movement created by the key is instantaneous, that due to the hammer, not so much. This can be demonstrated with an action that has excessive lead in the keys. Even with a light hammer, the inertial resistance is felt increasing at FF, regardless of DW. Ed Foote RPT http://www.uk-piano.org/edfoote/index.html -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100106/3e6415e1/attachment-0001.htm>
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