[pianotech] rcs design considerations

[Gene Nelson]

Thanks for the replies,
Sorry - I should have mentioned the piano is a late 1800's Hallet&Davis. The 
rim and bracing appear very similar to the Bosie.
Gene


> Gene Nelson wrote:
>> Hello list,
>> Just curious: For a typical radius crowned design for a 9ft grand that 
>> would go into a Steinway - how would you alter the design if the piano 
>> had softwood rim?
>> Would you alter the design?
>
> Good question. I'd have to see the piano, but generally, this would be my 
> approach.
>
> A bass cutoff replaces half the long side, and half the belly rail with a 
> rock maple rim. A fish replaces the top two octaves of the inner rim with 
> rock maple. Added bracing and mass loading beefs up the remaining treble 
> belly rail with a high impedance perimeter, which patches most of the rim 
> anchoring high frequency soundboard activity. From the middle of the scale 
> on down, it isn't nearly as critical. If anything, I'd likely add a bit 
> more bracing and mass loading to the treble rim and belly rail in 
> something like a Yamaha, but I'm not altogether sure it's more critical 
> than what I'd add to the Steinway. So no, while I'd probably make some 
> changes, I'd not expect a big difference.
> Ron N