Upright Shank Length

[Jon Page]

While installing new damper felt on a Hamilton with longer versions overall,
I am also extending the shanks on a few notes at the lower tenor break to
accommodate longer bichord felt there.

Is there a general rule as to a limit of what is practicable for a length 
of shank,
aside from fitting to the strings. Is there a ratio of (shank length)/(jack 
length)
or some such?

Just curious, before I delve into the wonderful world vertical dampers and 
geometry.

Regards,

Jon Page, piano technician
Harwich Port, Cape Cod, Mass.
mailto:jonpage@comcast.net
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