Upright Touchweight

[gordon stelter]

Yes, David Stanwod has told me that he has methods
applicable to uprights. I don't know what they are.
     Gordon Stelter
--- Farrell <mfarrel2@tampabay.rr.com> wrote:
> Two questions regarding upright touchweight.
> 
> First is the damper spring influence on touchweight.
> Let's say, with dampers lifted off strings and
> spoons not ever touching damper lever, touchweight
> is right on target - let's say 50 grams DW across
> the keyboard and 30 grams UW. Then we release the
> damper pedal so that dampers are engaging in their
> normal manner. Assuming some normal amount of
> friction associated with the damper flange and spoon
> riding on the damper action cloth (perhaps about 5
> grams?), is there a range of resistance (or added
> DW) that one can expect to encounter in a reasonably
> well designed and operating damper system? Stated
> another way, how much additional DW should I expect
> a well functioning damper to add to touchweight?
> 
> Second is key weighting. Is there any Stanwoodesque
> method at arriving at a calculated target balance
> weight for an upright key? I can only assume that
> manufacturers assemble the piano completely and then
> manually weight off the keys by tradional methods.
> 
> Thanks
> 
> Terry Farrell
>   
> 
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