the A floats

[Farrell]

Well I guess that would incorporate the assumption that the panel is quarter
sawn. Pretty big assumption for many pianos, IMHO.

Terry Farrell

> Grin... caught you off guard with that one...
>
> Its just that I seem to remember that on the PTG writen exam the
> question comes up... in which way does the panel grow/shink the most
> with climatic changes... and the answer was "in thickness".  Perhaps a
> bit off the origional question... but you know me... hehe.
>
> Cheers
> RicB
>
> Farrell wrote:
>
> >What the f.......
> >
> >Thickness???? Hmmm, well, I guess we are talking about a 3% change in
length
> >under the conditions described. If the panel is 8 mm thick - and let's
say
> >5% change in size because it expands more in the thickness direction than
> >cross grain on a quater-sawn panel - maybe we could see 0.4 mm change?
That
> >seems like a lot! But in the end, what is the difference, given the
> >question - how long does it take for a panel to react? Am I missing
> >something? Regardless of what happens during the reaction to a change in
> >relative humidity, isn't it the rate of change that was in question?
> >
> >Terry Farrell
> >
> >
> >
> >
> >
> >>Yo
> >>
>
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