Okay I owe ya'll (and myself as well) an apology for being, for lack of a better word, retarded. Although I double-triple-and quadruple-checked my math - I did NOT double check the darn STRING i was using in my calculation! Joe Garrett is right - as are all ya'll - i DID say G#2. For some bizarre reason i got stuck on D#2 and used that over and over...hence the discrepancy. John I actually did use the metric system for my calculations. I still don't understand what T to shoot for when calculating diameter. Is there a chart somewhere giving the T for different parts of the scale? <div class="gmail_quote">On Thu, Jul 14, 2011 at 6:02 AM, John Delacour <<a href="mailto:JD@pianomaker.co.uk">JD@pianomaker.co.uk</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> At 21:48 -0500 12/07/2011, Ron Nossaman wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> ...So the G#-2, with 0.040" core and 0.118" overall wrap comes to pitch at around 304 lbs, which is very near JD's result by similar method... </blockquote> Yes, the precise figure is not important and can only be arrived at if you know the precise average density of the speaking length, which you could only obtain by weighing, and that would be a waste of time and effort, since the error will amount to only a few pounds. In my day to day work I use 20000 for K in my formula, or rather just 2, because it's quick and dirty and tells me what I need to know. If you're working in inches then K can be 480. JD </blockquote></div>