On Sep 6, 2009, at 6:58 AM, Chris Solliday wrote: > My big concern with these parts is the felt bushings. According to Kirk Burkett, the felt bushing will soon be replaced by a hard bushing somewhat like the old Steinway teflon (except a somewhat different material, and since it will be in a plastic, not wooden, flange, not subject to humidity change). So this question may disappear very quickly in the next generation of WNG parts (not that that answers the question, but it's something to bear in mind). He seemed to think that this would happen within a year or less, as they were essentially satisfied with testing results, and only needed to deal with manufacturing issues. According the the tests, with some number of million swings (as he said, having Pianodisc systems readily available is convenient for testing), the friction moved by only a gram or so (say, from 4 to 3), and "firmness" stayed virtually constant. But we shall see. It will require new pinning tools, which they have already made available (at least they had them on display), reamers and burnishers graduated in .0005" increments. I'm not sure if the burnishers apply to the new material. I would think not, but neglected to ask. Regards, Fred Sturm University of New Mexico fssturm at unm.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20090906/a70394e4/attachment.htm>
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