Ron, you are known for having many fine ideas and interesting perspectives, but this one of a "third tuned duplex" via hollow WNG shanks strikes me as particularly brilliant! A crack marketing department could go wild with something like this. For example, not only would this be a third duplex, but a variable one as well. The faster and harder the notes are played, the higher would be the whistling pitches! "Be the first on your block to own an Acousto-Action!" But first, we would have to run the acoustic physics on "closed end -- open end" tube phenomenon. We should get on this right now --- could easily have it ready for Vegas. <G> NG On Tue, Jun 22, 2010 at 11:23 AM, Ron Nossaman <rnossaman at cox.net> wrote: > Nicholas Gravagne wrote: > > Trimming and / or sanding off the hammer shank (tube) stubs after the >> hammer glue has dried creates a black powder, some of which migrates into >> the hollow tube only to escape later on to your nice, clean backchecks. >> Break up the fibrous material in the tubes with a wire and vacuum out, or >> else allow the shanks to hang vertical and shake-'n-tap the powder out. >> > > I once asked Bruce if anyone had complained about the open shank ends > whistling. Got a laugh and a negative. Too bad. Could have marketed a third > tuned "duplex". <G> > > Ron N > -- Nick Gravagne, RPT AST Mechanical Engineering -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100622/a436a85f/attachment.htm>
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