Hi Ron and Don: I believe I have seen the mah-map bridge laminations in older Baldwin grands and even in some high quality uprights like Ivers & Pond, M&H. Jim Coleman, Sr. On Sun, 11 Jan 1998, Don Mannino wrote: > Ron, > > I'm not the designer, but I asked the piano design engineer the same > question when I was in Japan a couple of years ago. > > The mahogany laminations in the bridge root are there to adjust the mass > and flexibility of the bridges. Each piano model (RX-2, RX-3, etc) has > different thicknesses and numbers of laminations according to the string > and rib scaling of that model. I don't know how they devised the optimum > for each scale, whether empirically through testing or by some kind of > calculation. > > I have seen the same setup in other pianos, but I can't remember for sure > which they were. Seems to me Fazioli has this design, and I'm pretty sure I > saw it on a Hamburg Steinway some time ago. Has anyone else seen a mix of > maple and mahogany in bridge roots? > > Don Mannino RPT > > ---------- > From: Ron Nossaman[SMTP:nossaman@SOUTHWIND.NET] > > I've got a question for Don Manino about the Kawai RX series bridges... > why? > What prompted the alternating vertical laminations of what looks like maple > and mahogany? > > > >
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