Fred Sturm writes: > Unless action centers are nearly frozen, theircontribution to measured DW (or friction > calculated from DW and UW) is well > within 5 grams. As Don Mannino noted in an earlier post, he finds increasing > hammershank center friction from zero to (I think it was) 4 grams increases DW > by only 1.5 grams, which sounds about right. > Regards, > Fred Sturm > University of New Mexico Which brings us back to the starting point of this thread... how did a change in hammer shank center result in a signifantly larger proportional change in DW ? Unless something else was done, there is a mystery here to be solved. Didnt Jim say all he did was change centers and DW went from 50 to 70 ? RicB -- 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
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