---------------------- multipart/alternative attachment Apprappo the area moment of inertia. This is the one Ron N brought in a couple weeks back in the hammer shank stiffness thread isnt it ? Thanks for the link. This was a new one on me. Might be fun to see where this takes us with all these different hammershank shapes and sizes. Cheers RicB "Don A. Gilmore" wrote: > Hey Jude: The area moment of inertia is only dependent on the > crossectional shape and size and not on the material. So if you can > find a standard set of formulas, they are good for any material. Most > common crossections are > here: http://www.efunda.com/math/areas/Common_Geometric_Shapes_Index.cfm?search_string=moment%20of%20inertia You > can also easily calculate compound crossections made up of any > combination of these fundamental ones. I can show you how to do that > too, if you're interested. The units should come out in "length to > the fourth power", like inches^4, or m^4. Be careful not to use the > "mass" moment of inertia as that is used for dynamic calculations and > is in units like lbm-ft^2, slug-ft^2, or N-m^2. One psi = .0703 > kg/sq.cmOne kg/sq.cm = 14.23 psi. I don't think I understand your > angle question. 60' should mean "sixty arc-minutes", which is one > degree. What does your jig look like? Don A. GilmoreMechanical > Engineer -- 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/87/48/9a/ff/attachment.htm ---------------------- multipart/alternative attachment--
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