Message-ID: <00ca01c0032c$fba1c060$0464a8c0@station4>
From: "John Barrett" <2thman@olympus.net>
To: "Lancair Mail List" <lancair.list@olsusa.com>
Subject: Re: Computed AOA
Date: Thu, 10 Aug 2000 17:09:07 -0700
Reply-To: lancair.list@olsusa.com
Mime-Version: 1.0

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>Does the SFS unit actually know how many G's you're pulling?  If so, the
>accuracy you credit it with should be good enough for stall warning, even
if
>it assumes a gross weight.  If not, it's no better than an airspeed
indicator.

Yes the SFS does measure G forces and uses them to compute AOA.  I had a
discussion with Nate Calvin of SFS a few days ago regarding programming
requirement to allow pilot input of  initial weight and computer adjustment
during the progress of the flight to account for fuel burn.  He told me that
they had considered this aspect and thought it would be necessary when
designing the system, but when it came to practicality and actual flight
testing in GA aircraft, the difference was shown to be inconsequential.
Therefore weight is programmed as a constant.


Regards,
John Barrett - LIVP
CARBINGE- "The World Hinges on Us"
360 385 1000
http://www.olympus.net/personal/2thman/carbinge1.htm


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