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From: "R. Dan Ribb" <dribb@mediaone.net>
To: <rickschrameck@lvcm.com>, <lancair.list@olsusa.com>
Subject: RE: IO550 versus the IO550 FADEC
Date: Sun, 6 Jan 2002 00:14:35 -0800
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          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
There are a few pics of Bob Fair's FADEC installation at:
http://www.eaa376.com/l2k/  (click on "Bob Fair's Legacy 2K Project")

The photos taken on 9/1/01 attempt to capture the installation.  Note the
FADEC ignition units are installed inside the cockpit area between the
firewall and control panel (OK, not actually in the "cockpit").  The units
appear to actually penetrate the firewall with the ignition wires only on
the engine side of the fire wall.  Pretty slick, really.

While at first glance it looks like a lot of wires, look again.  One
shielded cable to each of six CHT, six EGT, a crank position device, MAP and
a couple others.  Now, I'm willing to bet most of you would have at least
that on a non-FADEC engine.  Maybe some thermocouple wires instead, but
wires none-the-less.  Then there are 12 ignition wires - same.

Now there are six shielded cables to the injectors and it looked like
possibly a couple other cables for something else.  But, all in all that
isn't a "lot more" wiring in my book.  For me, routing those 6 or 8 cables
is simpler than messing with the installation (and use) of just one mixture
cable.

Apparently Vision Micro can now interface their VM1000 to the FADEC units
that are behind the firewall.  While there will be some data need by the
VM1000 on the other side of the firewall (oil pressure and temp?) all the
EGT and CHT data supposedly comes from the FADEC.  Maybe even RPM, MAP and
fuel flow data.  See, wiring is getting simpler ...  <g>

But, alas, the cost and "newness" of this technology may scare many of us
off for awhile.

Why is it, Rick S., that you own a computer/software business but you're
afraid of computer technology used on your engine?  Is it cause you know
something we don't?  <g>  (just kidding, I too own a software development
firm ...)

  .. Dan ..

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>