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

[Gene Buckle]

I think he's referring to the "Kollsman" window, which is just a pressure
adjustment you make to the altimeter.  AFAIK, Kollsman is/was an altimeter
manufacturer.

g.

On Sat, 26 Oct 2002, Craig Rochester wrote:

> 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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