This is a multi-part message in MIME format. ---------------------- multipart/mixed attachment Inertia Heads, Here is what I came up with for figuring the total MOI of the action. Pretty much the same thing Mark D. came up with. If you plug in some numbers you will see that the hammer and shank contribute most of the MOI as felt at the key. John Hartman RPT John Hartman Pianos [link redacted at request of site owner - Jul 25, 2015] Rebuilding Steinway and Mason & Hamlin Grand Pianos Since 1979 Piano Technicians Journal Journal Illustrator/Contributing Editor [link redacted at request of site owner - Jul 25, 2015] ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: Speed-Ratio.jpg Type: image/jpeg Size: 34898 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/1a/a5/b2/b6/Speed-Ratio.jpg ---------------------- multipart/mixed attachment--
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