Even balance weight or even something else, that's thequestion.

[John Hartman]

Phil,

Thank so much for taking the time to explain the 
basics of inertia to me. I have a good grasp of 
static action properties but have been at a loss 
with this topic. I will save your post and study 
it at length. We seem to do a lot of complaining 
about the evils of action inertia with out knowing 
how it really works. I have felt that going to 
great effort to calibrate the static balance of 
actions without putting just as much effort into 
its dynamic balance is short sighted. What you 
have mapped out seems to show that there is yet a 
great uncharted continent of action mechanics to 
explore.

John Hartman RPT

John Hartman Pianos
[link redacted at request of site owner - Jul 25, 2015]
Rebuilding Steinway and Mason & Hamlin
Grand Pianos Since 1979

Piano Technicians Journal
Journal Illustrator/Contributing Editor
[link redacted at request of site owner - Jul 25, 2015]