Alt-BEAM Archive
Message #07210
To: beam@sgiblab.sgi.com
From: Bob Shannon bshannon@tiac.net
Date: Sun, 31 Oct 1999 09:29:33 -0500
Subject: [alt-beam] Re: Time Capsules
A magnet does not loose any strenght from age.
Permanent magnets will loose strenght from overheating, which commonly
happens to R/C racing motors.
Timothy Flytcher wrote:
> >I have a 20 year old small electric DC motor and it still works
>
> > > what about the magnets in the motors??? would the motors still run after
> >...
> > > say 30 years???
>
> yes I too have some that old... but how efficient are they? I also have some
> that completely died after just a year or so (new still in package) I know
> my r/c friends magnetize there competition motors on a regular bases... I
> have seen gains of 10%-30% by dissembly of the motor and remagnetizing the
> magnets and demagnetizing the armature.
>
> Timothy...
>
> ______________________________________________________
>
7211 Sat, 30 Oct 1999 21:32:03 -0500 Re: aquabot Greg Powell
| What if I put distilled water in the graduated cylinder and a thin layer
of
| oil on the top. Thus no bacteria and no evaporation or contamination, yet
| light still gets in.
|
| Greg
|
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