John A. said: "Floyd, I agree with Joe. Adjusting the springs will give you a static downweight in the right range, and the piano will play well at pianissimo. This is a good last step. The mass of the hammers comes into play much more at fortissimo, where the perceived force is increased, since F = ma. The faster acceleration of the key/hammer system is felt in the fingers of the player. If you have low-mass hammers, you feel like you are falling into the piano. A 10-gram hammer at middle C will feel like 50 when you look at the 1:5 mechanical disadvantage with 3/8" key dip and a 1-7/8" hammer travel. A 9-gram hammer will feel like 45. The hammer mass gives you a dynamic downweight feel. So, if you want the piano to feel more like a 52-gram-downweight grand, look at the hammer mass. John Ashcraft, RPT, Portland, OR Chapter John, Thanks for the validation.<G> Joe Joe Garrett, R.P.T. Captain of the Tool Police Squares R I
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