Roberto,
>I had to raise half step the pitch of an upright piano today.
>The owner asked me how many kilos (or tons)the tension increase
>in that case .
A half step pitch raise would increase the tension in the neighborhood of 5
to 6%. (12th root of 2).
The general neighborhood of tensions is 18-22 tons (~16.300 to 20.000kg)
others on list more knowledgeable...;-O
Conrad
Conrad Hoffsommer Office - (319) 387-1204
Luther College Music Dept Fax - (319) 387-1076
700 College Drive hoffsoco@luther.edu
Decorah, Iowa 52101-1045
Certified Calibration Technician (CCT) of
Digitally Activated Offgrid Tone Generation Systems
"If you have to plug it in, or you can't watch how it works,
I don't work on it."
This PTG archive page provided courtesy of Moy Piano Service, LLC