Rims and such...

[gordon stelter]

Sorry Del, all,
     When I am fatigued I fail to express myself well
so, for the record, THIS is my opinion on rims.

1) Rims should be deep enough so that, when coupled
with the plate, they keep it from flexing.
2) They should be made from some really hard stuff
which, as much as possible, transmits, rather than
absorbs vibrations. 
( And also adds to rigidity. ) 
3) They should not be SO big that they absorb
vibrations unecessarily, due to excessive mass. 
    Make sense?
    Yes, I know about Bosie rims. Spruce is naturally
resonant ( even when not positioned as a diaphragm
)but it is also a good transmitter of vibration, as
the anular rings are quite stiff and dense. 
     That is my opinion.
     Your comments are welcomed,
     Thump

--- Delwin D Fandrich <fandrich@pianobuilders.com>
wrote:
> 
> 
> > -----Original Message-----
> > From: pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]On
> > Behalf Of gordon stelter
> > Sent: April 08, 2004 11:25 AM
> > To: Pianotech
> > Subject: RE: AB Chase Concert Grand
> >
> >
> > >
> > > So you do not consider Steinways to be "good"
> > > pianos?
> > >
> > > Del
> >
> > I consider Steinways to be "pretty good" pianos.
> >      Thump
> 
> 
> How can they be? Their rims (at least up to the D)
> are only about 250 mm
> (about 10") deep.
> Hardly deep enough to considered "good."
> 
> Del
> 
> 
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