If no-one else has said this, and I haven't seen it yet, my understanding of the purpose of drop, other than the secondary result of having a visible let-off, is to "upstop" the repetition lever at the highest possible moment of rotation of the whippen and just before the sprung leverage rotates in the opposite direction so that the jack is allowed to return more efficiently under the knuckle. The more drop, a greater compression of the spring, a larger "bounce" of the knuckle on the rep lever, the less efficient return of the jack, and the slower the repetition. Paul In a message dated 11/25/2009 3:56:38 P.M. Central Standard Time, jonpage at comcast.net writes: >Fine tuning the simultaneous contact time is done with the distance >the jack is situated under the knuckle. This is done after multiple >refinements of the two. That is to say the position of the jack alignment to the core, not how much below the rep level it rests. It's a very fine balancing act to avoid cheating jacks. -- Regards, Jon Page -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091125/e716a3f7/attachment.htm>
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