[pianotech] Hammer Flange Friction

[John Delacour]

At 16:42 +0800 6/6/10, Bruce Browning - The Piano Tuner wrote:

>John,
>Yes, but what about upright action with "grand" checks, and uncovered, and
>slightly roughened spurs? Surely this is cost effective, as at least one
>part is then interchangeable, in the factory, between grands and uprights?

I don't see the point.  A grand check is far more costly than an 
upright, and besides, they do different jobs -- different speeds, 
different radii, different forces.  I'm sure someone would have tried 
long ago it if it had any chance of working.

JD