[simpits-tech] Zero point on a two needle altimeter

[Craig Rochester]

What is a Colesman window?

-----Original Message-----
From:	simpits-tech-admin@simpits.org [mailto:simpits-tech-admin@simpits.org]
On Behalf Of Matt Bailey
Sent:	Saturday, October 26, 2002 8:44 PM
To:	simpits-tech@simpits.org
Subject:	Re: [simpits-tech] Zero point on a two needle altimeter

I thought about a pressure box, but that seens like it would be tricky
to meter out exactly the right pressure to get a precise, accurate
reading. It would be cool if you could make it work though, you could
just output the atmospheric pressue in the sim...this would even allow
the Colesman window to work.

	-Matt Bailey

Craig Rochester wrote:
>
> Dumb questions about altimeters, speed indicators, etc. If they work like
> this: http://home.swipnet.se/~w-65189/AP_html/pitot_static.htm why can't
you
> just output two pressures?  The velocity pressure could be controlled by a
> voltage driven pressure regulator(V/P) and compressed air.  The barometric
> pressure would require vacuum and a vacuum version of a V/P.
>
> This way you could use standard instruments without modification.
>
> Craig R.
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Thanks!