compression vs rib crowning

Richard Brekne Richard.Brekne@grieg.uib.no
Tue, 11 Mar 2003 19:23:23 +0100



Brian Trout wrote:

> Hi Richard,
>
> Something that came to mind when I read your post...
>
> You're in Norway.  Would the Steinways that you see be New York Steinways or
> Hamburg Steinways?
>
> They may not be built the same way.
>
> Just a thought.
>
> Brian T.

Well,,, its true that I see mostly Hamburgs as far as instruments from after the
60's go. But there was a period there just before / during and after the war
that Hamburg wasnt really producing much... for obvious reasons, and so we have
actually quite a few NY Steinways from that time around. Also well before the
war there are some number of NY Steinways here.

Personally, I think the reason they do so well here has to do with our climate.
We rarely get much above 65% RH and only for very short periods of time when we
do. And each winter we are well on the dry side of things. Heated rooms are down
about 25% even here on the coast. Inland things can get a good deal drier.

The boards dont have a chance to experience much more then the crowning
compression (damage, it thats what it is) and are for at least over half the
year well under the 50% RH mark. Compression set of course will run its
course... but we see boards here that still have useable crown, and reasonable
sustain times in all ranges.

I have run into a few rebuilts that havent done so well.... and not just
Steinways... but this probably has more to do with the automatic lowering of the
plate some rebuilders subscribe to me thinks.

Cheers

RicB

--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html



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