Key Leads and Inertia

[Richard Brekne]

Stephen, Bill, John, Phil, and the rest of y'all:

Seems from reading the essay posted (below) that there is a direct
relationship between how far from the balance rail pin any eventual
leads are (perhaps the center of all key mass is better ??) and the
occurance of the breakpoint seperating soft/hard zones. At one point it
is said: 

	"moving the location of the lead moves the breakpoint (along the red
line)"

thoough there is no relationship (formula) given. I am wondering just
what this might be.

Its interesting that the use (or not) of leads changes absolutely
nothing relative to the division between hard/soft play. 

Another point I am a bit confused on. In all cases, the balanced line
has least slope, then the half balanced a bit more, and the non balanced
has the most slope. And clearly until the breakpoint is reached the non
balanced line gives the least acceleration for force. Yet at the same
time the degree of increase in acceleration for same amounts of increase
in force is greater for the non balanced line. This seems at odds with
the idea that the key would be more difficult to control in the soft
zones for the balanced key then the non balanced key.

It would seem (intuitively) to me that one would have better control
when the slope of the acceleration is slight. And this regardless of
which zone we are in.

> 
> 
> http://real.uwaterloo.ca/~sbirkett/inertia.pdf
> 
> 

-- 
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html
http://www.hf.uib.no/grieg/personer/cv_RB.html