bechstein

[Ric Brekne]

Hi again David

The 4-3-2 / 3-2-1  etc are leading patterns and in general the more lead 
peices you put in the heavier your FW's.  In the last few years Stanwood 
has developed his pattern leading to roughly relate to various FW curve 
levels.  The pattern leading distibutes key mass more evenly so as to 
allow for both an even FW (static) curve and a more even key to key 
inertia which gets into dynamic key <<weight>>.

I dont have his primer book so I cant reference it... but a 5.7 ratio 
with a SW8 or 9 curve generally points to reasonably close to maximum FW 
levels (depending on what BW you are specifying of course.)  I believe 
he also operates with a 5-4-3-2 pattern.

If you havent already down so... review the see-saw science 
<http://www.stanwoodpiano.com/seesaw.pdf> side at his website.  Put this 
stuff into perspective with his balance equation and experiement with an 
action model til you get it figured out.  Keep it basic for now.

Cheers
RicB



Thanks Ric,

I might take you up off line...so I'm looking at my "Little Stanwood 
Primer Book" at Appendix A...touch weight parameters table.   Not sure 
what the 3-2-1 compared to the 4-3-2 means other than more lead in the 
keys?   The 4-3-2 shows my 5.7 will get me in SW8 or 9 curve..right?   

I'm going through the measuring again and doing the partial sample set 
this time...just to make sure what I've got.   I've gone over the 
friction issues and now #16 is way different...D=43 U=17...too much lead 
for that key...5  3/8" leads...BW is 30...way to low...so if I can get 
it up to D=55 and U=23, I'll have BW=38...
You mentioned getting my BW down and I think I understand that now.   
Too much downweight and too much upweight...in general...heavier hammers 
will take care of some of that and FW changes will do the rest...?   I 
think...

David Ilvedson, RPT
Pacifica, CA  94044