[pianotech] Reversing Crown

[Ron Nossaman]

paulrevenkojones at aol.com wrote:
>  
>  
> In a message dated 12/25/2009 10:40:39 A.M. Central Standard Time, 
> rnossaman at cox.net writes:
> 
>     spring rate
> 
> Ron:
>  
> Can you explain this phrase in more detail, please.
>  
> Paul

  Spring rate : Usually expressed in lbs/in, it’s the force 
required to compress a linear spring one inch. Linear springs 
have a constant spring rate. Progressive springs have 
progressive spring rate that rise has the spring load increase.

Whether you're using inches, millimeters, pounds, or kilos, 
it's an numerical indication of the stiffness of a rib. The 
higher the spring rate, the stiffer the rib.
Ron N