[Diy_efi] Re: Electronic expertise requested

[Daniel R. Nicoson]

Phil,

You're no fun!  I do appreciate and respect your suggestion at caution going
the experimental route.  That caution is why I try to learn from
knowledgeable people before acting.

I have been closely following the experimental movement for 20 years.  I
agree there are good systems and some not so well thought out.  I'm simply
trying learn from those on this list that work in the electronics industry
and have to design for reliability.

As far as certification, there is no magic to the reliability of certified
aircraft.  I have owned one in the past and only because it had 30 years of
Airworthiness Directives (mandatory modifications or repairs) was it a solid
performer.  I currently keep fly in a 4 year old Cessna 172.  It has the
latest and greatest that Lycoming and Cessna have to offer in terms of
mechanical fuel injection and magnetos.  Nice airplane but it is an
experiment every time I fly.  Although they have made various forms of
mechanical fuel injection for a very long time this newest version is prone
to random backfire and rough running, particularly on takeoff-full power.
They have issued several service letters, the certified mechanics have
re-tuned the motor per those directives and we still have operation.  This
is a fleet-wide issue for those aircraft.

Take care,

Dan

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of Phil Hunter
Sent: Thursday, June 19, 2003 11:01 AM
To: diy_efi at diy-efi.org
Subject: [Diy_efi] Re: Electronic expertise requested


> Any thoughts or suggestions?

Interesting mental exercise. Leave it at that. You are obviously
so far out of your realm that you do not even (yet) understand
the "problem domain".

Stick w/ certificated magnetos and carbs or MFI. Waste gas. Make
shorter flights. Live long and prosper.

If you must experiment, focus on things that won't matter if they
fail. Do not attempt to control anything automatically, let the
pilot do the controlling. Data logging and instrumentation can keep
you busy for a lifetime. If you really want to "push the envelope",
might investigate Ion Sensing of the combustion. Harley Davidson's
system would seem to hold a lot of promise in that area, particularly
for air cooled engines.

Gar Willis was into experimental aircraft. Might study his posts
in the archives, that'll keep you busy for a long time too. :)

rgds,
philh
(digest)

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