Posted for "F. Barry Knotts" <bknotts@buckeye-express.com>:

Here's the word from a guy who knows a guy.

Barry Knotts
LIV-P, Conti TSIO-550, 15%, Perrysburg, Ohio

-----Original Message-----
From: Tony Kirk [mailto:RV6A@sev.org] Sent: Thursday, September 18, 2003 10:41 PM
To: F. Barry Knotts
Subject: Re: [LML] Re: Dynon development AH/EFIS

Barry,

Here is a quote from the RV forum about this, Doug works at Dynon.

Later,
Tony

-----------------------quote--------------

I just want to clear up any confusion with regards to the Dynon EFIS-D10
requiring pitot and static inputs:

The attitude algorithm implemented in the EFIS-D10 requires airspeed
input
as
part of the algorithm.  If you would look into textbooks that give the
equations for attitude, you will find airspeed related terms.  You can
either
measure it, get a estimate of it from the GPS, or estimate it using some
other
mathematical technique.  We wanted to display it as well as altitude and
VSI,
so we chose the most accurate way which is to measure it.

Having said that, you don't need to buy the Dynon AOA/pitot probe to
have a
proper functioning attitude indicator.  A standard pitot/static system
can
be
used directly with the EFIS-D10.  Our AOA/pitot probe will add the AOA
functionality to the instrument.

Hope this clears up any confusion.

Doug Medema
RV-6A N276DM (reserved)  Final assembly at the airport!!
-----------------------end quote--------------------------