>My try : > >The hammer has a rotating movement around the center pin of the shank. I agree with you there. After that you lose me. > >When hitting the string, we could consider two points : the point of first >contact between hammer and string, and the point of largest excursion of >the hammer accompanying the string at it's largest deflexion from rest >position before rebounding, at loudest playing power (this will be very >different in the bass than in the trebble). I believe that for maximum >power transfer between the hammer and the string, the movement of the >hammer should be not really perpendicular at contact time to the plane of >the resting string, but to a plane a bit higher (higher of something >approaching half the distance between the two points defined >earlier). This, because of the cosinus coefficient in the vectorial >force. Let us call this third very point the optimal quasi tangential >point of intersection between hammer arc and quasi perpendiculat to >largest portion of string plane when at approximately 1/2 of it's largest >deflection from rest position at loudest power playing >(OQTPIBHAQPLPSPA1/2LDRPLPP). You leave me speechless. Phil Ford >The fact is : if you bore your hammer shorter and have the shank run >beyond parallel to the plane including the OQTPIBHAQPLPSPA1/2LDRPLPP, you >loose some power..... > >Regards, > >St�phane Collin.
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