REFLECTOR:FADEC info

[Wayne Lanza]

Hi Jim,
  If you haven't been made aware of the Aerosance web site - here ya 
go...
I worked closely for a week with the designers of the system while 
installing
the Continental FADEC system in Velocity's XL Dash 5 demonstrator 
aircraft.
They have designed many failure mode operations into the system, safe to
say that (probably) all of the gotcha scenarios have been addressed.

Have a Great Holiday,
Wayne Lanza
Composite Design

goto the Aerosance web page at - http://www.FADEC.com
________________________________________________________________

On Thursday, December 18, 2003, at 11:16 PM, Jim Sower wrote:

> I need some help with some specifics on how FADEC works.
> <... FADEC system meters the fuel-air mixture to ... power ... 100 
> degrees Rich of
> peak ... cruise ... 100 degrees Lean of peak ...>
>
> Is it safe to assume that this FADEC feature is driven by EGT sensors?
>
> Is it further safe to assume that FADEC varies fuel delivery from one 
> cylinder to
> another according to individual EGTs (which of course are caused by 
> uneven air
> delivery through the non symmetric intake runners)?
>
> IIRC, EGT probes tend to fail by degrees, giving increasingly 
> erroneous readings for a
> while until they quit altogether.  How does FADEC [allege?] to deal 
> with partial
> failures of EGT probe?  Total failure?
>
> Inquiring minds need to know .... Jim S.