[pianotech] [Correction] re design

[John Delacour]

At 21:31 +0000 3/2/09, John Delacour wrote:

>...if the  strike height is, say, 200mm at note 40 (strings 
>horizontal) and the design requires the head to be at 90 degrees to 
>the shank (not by any means the rule), then for a hammer centre 
>height of 150mm, the bore length is 50mm if you make no allowance 
>for wear.  If the strike height is 196 at note 85/88, then the bore 
>length must be 47...

I meant 46, of course --> 50 - (200-196)