[pianotech] Not one of Bechstein's design triumphs....

[David Boyce]

Makes total sense Del, thanks for that.

It's not as if there wasn't plenty of space available on the pinblock, 
to have had half the bichord tuning pins a little further over. It would 
make perfect sense if on the original pattern, they were!  Unless 
someone had a theoretical bee in his bonnet about keeping the string 
straight as it went through the agraffe. But having the tuning pin 
further over by a millimeter would not introduce much of a bend at the 
agraffe hole.

As Jurgen pointed out though, here we are in 2012 with the piano still 
going (reasonably) strong. So, by no means a disater, in the end!

Best regards,

David.
www.davidboyce.co.uk


> From a design perspective it is not OK to have a string resting 
> against the coil of a neighboring string. But this may not have 
> started out as a design issue.
>
> These holes would have been indexed in one of two ways: either 
> "dimples" were located in the original frame pattern or they were 
> drilled using a drilling template of some sort. In either case errors 
> were common over a production run. Pattern repairs were made by 
> patternmakers whose knowledge of the overall piano was probably 
> limited. He would have little knowledge (or concern) over a row of 
> dimples moving a millimeter one way or another. And that's all it 
> would take to produce this error.
>
> Or the worker who made the drilling template could well have made it 
> slightly out of spec.
>
> In either case the problem would not discovered until this piano, and 
> a few dozen (or a few hundred) others, were well into production. And 
> then it would take some while and a lot more work for the problem to 
> get fixed.
>
> ddf
>

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