>Let's say I measure a note on a grand action and >find that there is 12g of friction measured statically (D-U/2). When the >action is played through its dynamic range does the friction go up >proportionally to the increased force applied to the key? > >John Hartman RPT John and Stephen, Try simulating dynamic friction by attaching weight onto the hammer then Measure U/D and calculate friction. Tie down the jack so it stays under the knuckle when measuring UpWt. I'd use maybe a 50 gram weight.... David Stanwood
This PTG archive page provided courtesy of Moy Piano Service, LLC