Measure friction weight was: Weighting upright keys question

[KeyKat88 at aol.com]

Greetings,
 
             So how do I start making measurements to see what weight a 
key(s) neeeds?  How do I measure friction? I am guessing that I should start  by 
measauring the the foot-lbs (or cm-grams?)  inertia it takes to start the power 
stroke at the wippen heel/foot. Then I have measured my fricion...right? Then 
I can do the uw/dw calculations.
 
Julia 
Reading. PA
 
In a message dated 2/16/2008 11:27:46 PM Eastern Standard Time, 
fmurray at cruzio.com writes:

Given a certain friction in the piano we are going to want to set up 
something like maybe a downweight (dw) of 50 and an upwight (uw) of 25. All numbers in 
grams. This is assuming a friction of 12.5.





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