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echristley(at)nc.rr.com
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 Posted: Fri Sep 21, 2007 2:47 pm Post subject: EFIS as only reference???EFIS as only reference???EFIS as o |
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Peter Harris wrote:
| Quote: | Now that I have been through the exercise (which was a learning experience
for me) I would seriously consider the EC2 which has simple pilot controls,
simple programming and it has the advantage of dual redundancy, for a few
less dollars. It was developed and marketed by a family company purpose
built for aircraft (although not certificated.) The Megasquirt would also be
OK if you want to save dollars and it could be made dual redundant.
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Peter, I'm going through this exercise now, and I've settled on the
Megasquirt. The only thing that recommends it for me above the EC2 is
that I get to play with the source code. Not helpful unless you're a
software engineer.
The way I'm handling redundancy is that the Megasquirt will control fuel
injectors. If this fails, I will fall back to a manual valve that
meters fuel into the intake. The backup would be useless for starting
the engine on the ground, but from 6000ft it will keep the engine
running as long as I have fuel.
The ignition will be handled by two Ford EDIS ignition controllers that
are supplied with an input from the Megasquirt to control advance. I'm
going with a rotary, which has two plugs per chamber. If I loose the
Megasquirt, the EDIS modules will still supply spark with a set
advance. If I lose one EDIS, spark will be supplied to one plug per
chamber by the other.
I think the redundancy is as good as it gets in light aircraft.
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Peter H
Joined: 20 Mar 2007
Posts: 197
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| Posted: Fri Sep 21, 2007 3:20 pm Post subject: EFIS as only reference???EFIS as only reference???EFIS as o |
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Ernest,
Your set up sounds good. I am interested in your manual valve back up and
would be happy for any details. I looked at the possibility of using a
carburetor as a throttle body but gave up with the aerocarb because it jams.
A suitable butterfly carb would be an option but I like your idea.
Peter
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ainut(at)hiwaay.net
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