popsicle stick engineering

[David C. Stanwood]

Wow.... 1/2 low strike weight level would work with a 6.5 ratio!  For a 
modern hammer weight 1/2 medium to 3/4 medium even as heavy as top medium 
is a good match for a 5.6 ratio depending on how dynamically light a feel 
your looking for.

David


>5.6? This is on a Steinway B that currently has a SWR of 6.5 with
>17mm Steinway shanks.
>
>Kent
>
>
>On Oct 29, 2006, at 9:29 AM, David C. Stanwood wrote:
>
> > Hi Kent,
> >
> > Strike Weight ratios will always vary note to note.  Better to hit
> > an average Strike Weight Ratio level using a straight capstan
> > line.  This means finding sample capstan positions across the key
> > board that hit the target SWR.  When you hold a straight edge to
> > the sample marks they will not all be exactly on the line.  Strike
> > you new capstan line such that it comes closest to all the marks.
> > Let the key ratio be what ever it is to be to make your target
> > SWR.  What is your target SWR?
> >
> > David S
> >
> >> Of course. It was strike weight ratio to which I intended to refer in
> >> my original post. I assumed one wants both ratios to be as uniform
> >> across the keyboard as one can manage, especially on a piano that is
> >> likely to have new parts again in the future. Right?
> >>
> >>> Kent
> >>>
> >>> Have you considered the fact that if you move the capstan to make
> >>> the key ratio change your changing the wippen ratio as well?  A
> >>> more complete picture of the effects from moving a capstan line
> >>> are found by seeing what kind of strike weight ratio a given
> >>> capstan position will yield.
> >>>
> >>> Helpfully hopefully,
> >>>
> >>> David Stanwood
> >>>
> >>>>
> >>>> OK, so you establish a new capstan line. Excellent. As long as I'm
> >>>> checking and controlling the key ratio, I'll guard against
> >>>> perpetuating mistakes in the original drilling. Thanks, I
> >>>> appreciate it.
> >>>>
> >>>>
> >>>> Kent