---------------------- multipart/alternative attachment Dave Nereson wrote: > So... I ask you... why we are supposed to measure down to the balance > > rail, and up to the capstan and at the same time not take into > consideration the horizontal deflection of their angles before > figuring > their ratio ? > > RicB > I don’t know. But in this month’s Journal, on page 36, that’s where it > shows to measure. ;) > -David Nereson, RPT, Denver > I think if you read the text of the article you will find it quite purposely avoids defining the << correct >> method of measuring the arms of the levers. In the second paragraph two key sentences "...the Stanwood Strike Weight Ratio (R) can be expressed as the product of the appropriate individual leverage ratios of the three levers of the action: the key stick, the wippen, and the hammershank" and "This value for the overall ratio of the action can be arrived at by measuring the appropriate lengths of the arms of each of these levers in much the same fashion as the overall action ratio traditionally has been calculated." further a footnote which states the following. "It must be noted that there are several conventions for measuring hammer shank ratio and it has been long debated which of these is most useful. Regardless of which convention is used at any given time, it is important to agree on which set of parameters are being discussed so as to assure a common ground for meaningful discussion." -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html http://www.hf.uib.no/grieg/personer/cv_RB.html ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/5b/21/74/2b/attachment.htm ---------------------- multipart/alternative attachment--
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