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Re: [Healeys] Speedometer gearing

To: "healeys@autox.team.net" <healeys@autox.team.net>
Subject: Re: [Healeys] Speedometer gearing
From: Per Schoerner <healeyguy@bredband.net>
Date: Mon, 16 May 2011 10:24:18 +0200
Hi
Well, at least this thread started a little discussion. I think what I 
need now is access to a non overdrive gearbox. Anyone on the list with 
such a gearbox care for getting a little dirty? Calculate the number of 
turns on the prop shaft is required to turn the speedometer cable 1 
turn. I'll do the same on my car.

As far as I know the magnets are permanent magnets. I don't think 
permanent magnets change. If that would be the case every speedometer 
out there would be different and eventually give up. Magnetism is a 
science in itself, but as I have understood it a permanent magnet is 
made of a certain combination of materials and doesn't change. And you 
can not recharge it either.


Per in Sweden.
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