RC vs CC again

[Phillip Ford]

>Phillip Ford wrote:
>And I haven't yet become personally convinced that a RC
>>soundboard can produce this.
>
>
>Phil,
>If I understand you right, you don't think a Rib Crowned board can 
>be built to sound like a Panel Crowned board. If I have this right I 
>say I can't agree. If you make the board with the same sized ribs, 
>the same crown, the same panel thickness and and they both have the 
>some bearing then I believe they will sound the same. They will have 
>the same mass and stiffness and therefor the same acoustical 
>properties.
>
>John Hartman RPT

John ,

What I was trying to say was that I don't know if a rib crowned board 
can be built to sound like a panel crowned board.  I don't have much 
basis for comparison, since I've heard only a few of what I believed 
to be rib crowned boards.  These haven't achieved the same high level 
as some pianos I've heard with panel crowned boards.  Based on my 
personal experience I therefore have to conclude either:

1.  A rib crowned board can't sound as good as the best panel crowned board.

2. I haven't heard a broad enough group of samples to see that they 
are equivalent sonically.

If I understand Ron N correctly, he believes that you can't just 
substitute a rib crowned board for a panel crowned board.  Some 
redesign would be necessary.  Would you agree with that assessment?

Phil Ford