rib radius

[Erwinspiano@AOL.COM]

---------------------- multipart/alternative attachment
In a message dated 7/11/2002 4:31:37 AM Pacific Daylight Time, 
mfarrel2@tampabay.rr.com writes:

        Dittos Terry. 
    I Know of no on using less crown in the treble. At least many are using 
60ft. thru out and many of us increasing radius into  the treble. I think the 
confusion is that a 60 ft. curve on a 40 inch rib appears to have 
proportionally more crown (7-8 mm) than a 15 inch rib with a 25 ft. curve ( 
1.5mm) when observed visually. 
>>>>>Dale Erwin>>>>>>>>

> > Like rib radius it seems to be that less crown is 
> > desired in the treble and more in the bass.
>  
> Depends on how you are measuring crown. If you measure by how far the 
> soundboard bows from a planar surface, you are looking for more crown in 
> the middle of the board. From a manufacturing point of view, crown is more 
> commonly measured by the radius of curvature one tries to build into the 
> finished product. In that case many board designers are generally putting 
> more crown in the treble and less in the bass. Some put the same crown 
> across the whole board.
>  
> 


---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/0f/e7/ef/76/attachment.htm

---------------------- multipart/alternative attachment--