Bridge as a 2nd class lever

Gene Nelson nelsong at pbic.net
Wed Aug 9 11:19:51 MDT 2006


I would like copies myself - did not pick them up.
Gene
----- Original Message ----- 
From: "Ric Brekne" <ricbrek at broadpark.no>
To: <pianotech at ptg.org>
Sent: Wednesday, August 09, 2006 9:42 AM
Subject: Bridge as a 2nd class lever


> Hi Gene.
>
> Yes, thats more or less the general description I remember.  The printouts 
> I'm interested in were not in the handout, but were lying on the table in 
> front. He did show each of them as part of his talk on the matter.  I was 
> just wondering if anyone had copies of these they would be kind enough to 
> send my way.  I believe these were based only on a modeling of the concept 
> and that no actual measurements have been taken.
> Cheers
> RicB
>
>
>
>
> Ric,
> As I recall from Ron's class the concept was that the treble end of the
> bridge - under load - acts as a fulcrum - it transfers  bearing load to 
> the
> curved part of the long bridge in the killer octave area. The case being
> made that more bearing load happens there than you would think.
> The only formula on the handout was for sizing ribs as support beams and
> deflection under load.
> I can scan it into Word if you like - I do not think that Ron would mind.
> Gene
>
> 




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