Re: Bohnenberger's Bennet's doubler (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 21 Apr 2004 10:29:20 -0300
From: Antonio Carlos M. de Queiroz <acmq@xxxxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Bohnenberger's Bennet's doubler (fwd)

High Voltage list wrote:

> From: Godfrey Loudner <ggreen@xxxxxxxx>

> As someone who has done a little woodworking, is that some sort of tropical
> hardwood.

Many, including Mahogany, Teak, etc., and many less known woods that are
good too. I usually recycle wood in my constructions, using what I find.
Not a very good idea, as I already had to replace parts because the wood
deformed excessively after some time. Pulleys become elliptic, balls
start to look as eggs, and parts that should move become locked
in place. Looking at what I have built, I had better results with
pink peroba, that is very stable an beautiful:
http://www.coe.ufrj.br/~acmq/bbwhites2.jpg
My new doubler is already in the line for rebuilding, after a weekend in
a room with conditioned air that deformed the base and locked the
mechanism...

I hope to have some time in the next days, and will build another
doubler,
also from Bohnenberger's paper from 1801 in the Annalen der Physik:
http://www.coe.ufrj.br/~acmq/bohnen18017.jpg
http://www.coe.ufrj.br/~acmq/b1801nich.jpg
http://www.coe.ufrj.br/~acmq/b1801nich.wmv

Antonio Carlos M. de Queiroz



Antonio Carlos M. de Queiroz