Touchweight Metrology Question

[Jon Page]

Everyone is getting too bogged down with SBR. Overly thinking too 
much.  (Don't think,. DO   -- Yoda)

The hammers in question are too heavy, period.  Lower them to the quarter 
medium zone ( ~ 10.8 to 5).

The SBR will stay relatively the same because the BW changes proportionally 
with the SW.
To some degree the friction may lower also by having less weight on the 
knuckle and capstan.

For instance, if your lower the SW of note 16 from 11.9 to 10.3.
The SBR is presently 5.8 (we'll call it 6).
Dropping the SW 1.5 g will lower the BW by ~9g bringing it from 49 to 40; 
this is still a 5.8 SBR.

Likewise dropping the SW of note 76 (SBR = 5.4) from 7.3 to 6.2 will lower 
the BW ~5g. Bringing BW to ~45; SBR 5.5.
Even by adding 6g to FW, the SBR will stay the same because BW changes 
proportionally.

There is no need to make such a big production of it. Don't make it so 
convoluted.

Lighten the hammers and watch what happens, the tone in the treble will be 
clearer; I betcha.





Regards,

Jon Page,   piano technician
Harwich Port, Cape Cod, Mass.
mailto:jonpage@attbi.com
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