---------------------- multipart/alternative attachment Joe, If you figure the jack is pushing on the knuckle, it would be causing the shank to bend backwards(downward). When let-off occurs, I'd think that the hammer head would then catch up with the rest of the shank.... I'm just suggesting this as a possibility. I claim no extensive knowledge of physics..... Dave In a message dated 4/28/03 4:55:01 AM Pacific Daylight Time, imatunr@srvinet.com writes: > Would not that slow down the hammer? > Joe Goss > <A HREF="mailto:imatunr@srvinet.com">imatunr@srvinet.com</A> > <A HREF="http://www.mothergoosetools.com/">www.mothergoosetools.com</A> > > >> ----- Original Message ----- >> From: <A HREF="mailto:Piannaman@aol.com">Piannaman@aol.com</A> >> To: <A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> >> Sent: Sunday, April 27, 2003 11:32 PM >> Subject: Re: hammer velocity >> >> >> In a message dated 4/27/03 7:12:21 AM Pacific Daylight Time, <A HREF="mailto:mjbkspal@execpc.com"> >> mjbkspal@execpc.com</A> writes: >> >> >> >>> Between let-off and impact, the jack, rep lever, and string are not in >>> contact with the knuckle. The list of forces acting on the hammer/shank >>> assembly consists of gravity and center pin. period. Both are acting to >>> decelerate the hammer. >> >> Mike, >> >> What about the flex of the hammer shank? When the jack releases, it is no >> longer forcing the shank to flex, thus allowing it to spring back into its >> original form a nano-second before striking the string. Couldn't that >> cause acceleration of the hammer head? > ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/ee/ff/81/30/attachment.htm ---------------------- multipart/alternative attachment--
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