---------------------- multipart/alternative attachment . Del I think we said the same thing using different words although it would have been helpful if I'd used the word rib in relationship to rib/ or board crown. I was responding to the earlier post speaking directly about rib curvature so I didn't think further clarification needed. Anyway, now no one should be unclear. >>>>>Dale Erwin > >> Dittos Terry. >> I Know of no on using less crown in the treble. At least many are >> using 60ft. thru out and many of us increasing radius into the treble. I >> think the confusion is that a 60 ft. curve on a 40 inch rib appears to >> have proportionally more crown (7-8 mm) than a 15 inch rib with a 25 ft. >> curve ( 1.5mm) when observed visually. >> >>>>>Dale Erwin>>>>>>>> >> > > Dale & Terry, > > Let's define our terms here. When talking about increasing or decreasing > crown we're generally referring to the amount of visible curvature in the > system -- a particular rib or the whole board. So an increase in crown > means the system has more visible curve and a decrease in crown has less. > It's the radius of the curve that is changing. Now, if we're talking about > radius then a rib cut to a 40' radius has more crown than does a rib cut to > a numerically larger 60' radius. Regardless of length. > > We use ribs of smaller radius (larger crown) in the treble and ribs of > larger radius (smaller crown) in the bass. > > At least I think that's what Terry was referring to? > > Del > ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/d0/2b/27/0d/attachment.htm ---------------------- multipart/alternative attachment--
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