Lee, I think you mean 52.5mm, not 55mm blow (5 X 10.5 = 52.5). However, there is also after touch within the dip. For example: suppose blow is 47mm and let-off is 1mm. Then the hammer will rise 46mm for 9.2mm of dip, which leaves 1.3mm dip for after touch. Jerry Cohen, RPT NJ Chapter ________________________________ A hammer blow / Key dip ratio of 5:1 would result in a 55mm blow for a 10.5 key dip. Would this not be an excessive blow distance? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090310/aa4e4317/attachment.html>
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