Downbearing/Unsubscribe

[Jim]

Hi Ron:

It think your chart is a monumental contribution to the list. It is so
far ahead of the old "nickel thickness bearing" measured at the hitchpin.
That old method would give you different downbearing based on how long
the tail end from bridge to hitch was. This method is more consistent.
By taking measurements about once per octave and multiplying by the 
number of strings, one can get a fairly good idea of the total down
pressure on the soundboard system. Years ago George Defebaugh used to
get up on top of a grand and stand on a 2X4 placed on the treble bridge
to show how little his weight change the tuning pitch of a piano as
compared to the downpressure of the strings by themselves. George did
not weigh nearly as much as a small elephant.

Jim Coleman, Sr.