[Tigers] guage needle paint

[Jay Laifman]

Aw shucks.  And here I was thinking that my car really came on the cam
after 4,000 rpm!

On Mon, Sep 12, 2016 at 8:12 AM, Smit, Theo via Tigers <
tigers at autox.team.net> wrote:

> Stepper motor or quadrature coil driven gauges actively drive the needle
> to a given angle on the gauge, so they are not that sensitive to the needle
> weight. However, our old-school tachometer only expects to drive against
> the torsion spring in the needle movement, and its linearity across the
> scale depends on being properly counterbalanced. If you put on extra paint
> without adjusting the counterbalance then the tach will start to read low
> at idle and high at the redline.
>
> Theo
>
> From: Tigers <tigers-bounces at autox.team.net> on behalf of Tigers List <
> tigers at autox.team.net>
> Reply-To: "CoolVT at aol.com" <CoolVT at aol.com>
> Date: Saturday, September 10, 2016 at 9:05 AM
> To: "tsmit at shaw.ca" <tsmit at shaw.ca>, Tigers List <tigers at autox.team.net>
> Subject: Re: [Tigers] guage needle paint
>
> Think I told this story before.....a person I know worked in a factory run
> by BF Goodrich Aerospace many yrs. ago. She soldered and assembled parts to
> gauges.  Her place in the assembly line was to solder a few parts, paint
> the needle and assemble her section of the gauge.  I asked what the needle
> paint was and she said she didn't know. It was just something in a little
> bottle and had a brush. She said the other people put one coat on the
> needle, but she liked to put on 3 coats to make it look nice:-)
>  Someone reminded me that these gauges were most probably calibrated after
> final assembly and testing. But it seems funny when we worry about putting
> too much paint on our needles.  These gauges, being used in the aerospace
> industry, gauges that were assembled by workers who had to become certified
> solderers (never knew that designation existed) , each worker having a
> specific  task in the assembly and these gauges having to cost 10's of
> thousands of $ each, just got a few dabs of some kind of red paint
>
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