Good idea Richard. I think I will try that. I have lots of old flanges laying around. My first trial there was to simply see whether a flange hole got bigger or smaller with increased humidity/moisture content. It is clear to me, contrary to apparent popular belief, that a hole in a flange decreases in diameter with increased humidity/moisture content. Terry Farrell Piano Tuning & Service Tampa, Florida mfarrel2@tampabay.rr.com ----- Original Message ----- From: "Richard Brekne" <Richard.Brekne@grieg.uib.no> To: <pianotech@ptg.org> Sent: Saturday, January 13, 2001 4:22 AM Subject: Re: Results are In! Re: moisture in wool or wood. > > > Ron Nossaman wrote: > > > > > What the heck, why not? The fact that the rod is tighter in the hole means > > what? It means that the hole is possibly smaller overall, possibly narrower in > > one direction even though it's the same or wider in another - but that's not > > where I'm going. My thought is that if you can still push the rod into the > > holes, they couldn't have gotten all that much smaller - surely not enough > > smaller to have compressed a cloth bushing enough to seize a center pin enough > > to prevent it's rotation in the flange short of standing on it. Since it's > > unlikely that the pin swells that much either, that leaves either, or a > > combination of, the birds eye swelling and jamming between the flange ears (if > > they don't spread with the swelling of the flange body (another measurement > > test?)) and the bushing swelling. > > > > Ron N > > Not meaning to be picky... grin.. but I will... how does Terrys experiment yeild > any information about the amount of compression that would be exerted on the > centerpin ? I mean the drill bit is really hard and aint going nowhere... a felt > bushing would give a bit, and I dont think we are exactly clear on just how much > pressure it takes to cause a centerpin to get sluggish. > > That being said... Terry.. it might be more enlightening to try the following ... > do the same experiment with and without centerpin bushings... and see which one > gets tight. > -- > Richard Brekne > RPT, N.P.T.F. > Bergen, Norway > mailto:Richard.Brekne@grieg.uib.no > > > >
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