Message-ID: <01d201bf3c10$a59aeb80$0464a8c0@station4>
From: "John Barrett" <2thman@olympus.net>
To: "Lancair Mail List" <lancair.list@olsusa.com>
Subject: Fw: SFS input
Date: Wed, 1 Dec 1999 15:27:57 -0000
Mime-Version: 1.0

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----- Original Message -----
From: <InteracSol@aol.com>
To: <2thman@olympus.net>
Sent: Wednesday, December 01, 1999 10:47 PM
Subject: Re: SFS input


> In a message dated 12/1/99 12:49:54 PM Mountain Standard Time,
> 2thman@olympus.net writes:
>
> << I need to know where it gets:
>      a. altitude
>      b. airspeed
>      c. barometric pressure
>      d. vertical speed >>
>
> All these come from the EAU (engine/airdata unit) connected to your
> pitot-static system.
>
> << If it gets most of these from the AHRS, can this data be used by the
>  autopilot?  Can conventional instruments be rigged to provide backup for
the
>  autopilot and EFIS in case the AHRS fails? >>
>
> The AHRS is used for attitude and heading only.
>
> << I will be using an S-tec 55 autopilot with altitude preselect.  Can I
use
>  the same input data as the EFIS to inform the autopilot of the data it
>  needs?  Or will I need to use conventional instruments for the S-tec? >>
>
> The EFIS will provide navigation information to the 55.  The AP uses it's
own
> gyros for stabilization and it's own pressure sensors for altitude
preselect.
>  We are in the process of installing the same autopilot in our 210.
>
> <<  Also, I think I've seen some of your literature indicating a VFR GPS
is
>  packaged with both the EFIS 1000 and EFIS 2000, but one of your brochures
>  shows the VFR GPS as not included with the EFIS 2000.  Which is true? >>
>
> All systems include the Garmin GPS-35 (although that wasn't originally the
> case).
>
> Gordon Pratt
> Sierra Flight Systems LLC
>

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