In a message dated 9/22/2006 11:49:01 A.M. Eastern Standard Time, ilvey at sbcglobal.net writes: I have mentioned this before but would be the problem with adding some key leads to the lever instead of a spring? Hi, David, and Colleagues - The difference between spring and lead is 'mass'. Add lead, you add mass and increase inertia. This can actually slow down the movement of parts in some circumstances. Consider that a part like a trapwork lever must accelerate four times in one cycle of action. (Remember that deceleration is merely negative acceleratiion.) Springs add negligible mass, and can provide more (or less) acceleration than the one 'g' provided by gravity working on the lead. Best regards, ~ Tom McNeil, RPT ~ Vermont Piano Restorations 346 Camp Street Barre, VT 05641 (802) 476-7072 -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20060922/8ab2ab00/attachment.html
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