Over-Strike vs Under-Strike

[Ron Overs]

>Shifting slightly to the concept of scruffing...    The hammer 
>contact will always "scruff" towards the hammer pivot axis (unless 
>the pivot axis could somehow lie in the plane of the string).   The 
>closer the pivot axis is to the string, the less "scruffing" will 
>occur.
>Steve Fujan

That's a good point Steve. Its a compelling reason, when designing a 
grand piano, for locating the hammer center pin and close to the 
string plane as practical, given that it needs to clear the pin block.

I haven't looked at this matter with respect to the upright yet. I'll 
be drawing a side elevation over the next couple of weeks. Will look 
at a few options to see what seems to be an approach. My experience 
with upright piano action geometry is quite limited as yet.

Ron O.
-- 
OVERS PIANOS - SYDNEY
    Grand Piano Manufacturers
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mailto:ron at overspianos.com.au
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