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Dear Eric:

   Good to have a TCM man in the forum!  I, too, am interested in when the
FADEC will be ready for the IO-550.  For exptl use, we don't need
certification, so .... ?  How will the FADEC unit handle LOP operation,
which is one of the nice features of the IO-550?  I was pretty happy with my
last one (ES #1), but I never did quite figure out the routine for jiggering
the mixture in a long descent, with a flipover to ROP operation at some
point down low.  I also wonder how the FADEC algorithms will be built to
handle these sorts of things.

   Exhaust system as supplied by Lancair for the ES in '96 was awful.  It
was too small in diameter right through, was not graduated in size as each
cylinder came in to the "logs", and the short pipes made for horrendous
cockpit noise and excessive detonation ("popping off", we used to call it,
in 'fifties hot rods) in the pipes at low speed/rich mix, e.g., when in the
pattern.  I had a properly sized system built by Dawley Aviation, but with
short pipes it also popped occasionally.  [Long story, but early on I had
longer pipes that I had planned to run into a muffler hung in the midline --
gave it up.]

   Anyway, I notice that Cirrus are using an extended exhaust pipe, which
they claim gives a bit of a performance boost, and probably reduces cockpit
noise, too.  Any thoughts on this?  Is TCM working on the exhaust end at
all?

Jim Cameron,  ES #2 in progress.

[P.S.  Anyone seen a recent version of the ES exhaust supplied by Lancair?
I'm wondering if it's still the same, too-small system.]

LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
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Please send your photos and drawings to marvkaye@olsusa.com.