Contraversial basic regulating

[mccleskey112 at bellsouth.net]

Frank: I believe that I read somewhere that friction is the result of the 
exertion of energy and that heat is the result of friction. And that heat 
causes wear. Good reason to have a well lubed action. Slows the wear and 
tear on the action parts.
Gerald McC
----- Original Message ----- 
From: <pianoguru at cox.net>
To: "Pianotech List" <pianotech at ptg.org>
Cc: "David Boyce" <David at piano.plus.com>
Sent: Sunday, February 17, 2008 12:47 AM
Subject: Re: Contraversial basic regulating


>> In normal playing, ......  the hammer is already
>> moving forward by virtue of the imparted momentum at the point of letoff,
>> and it simply travels off the jack tip of its own momentum, so that there 
>> is
>> no friction involved.
>
> There is considerable friction involved.  Observation of the wear to the 
> buckskin should make this obvious.  The greater the force applied to the 
> key, transmitted through the jack tip, the greater the friction at the 
> knuckle (hammer butt, in the case of the upright), as the acceleration 
> continually increases throughout the system.
>
>>if you have a football sitting on your open
>> palm, it will not leave your palm if you simply lift your hand gently. 
>> But
>> if you lift your hand quickly with sudden velocity, the ball will leave
>> contact with your palm and travel up by itself.
>
> Yes, but you will feel the friction as it leaves your fingertips with 
> greater speed of motion than with a gentle slow motion.
>
> Frank Emerson