Mark,
That could
definitely be it. RF can get into places
that you don’t want in. I wonder,
since your cable lengths are so long to the battery, if you could be getting RF
into the EC2 power. You could try
a small bypass capacitor on the +12 to ground near the EC-2 to get rid of any RF. Of course perhaps Tracy already has
that covered. Very possibly.
Do you
have a good ground to the case of the nav/com ?
Steve
-----Original
Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]On Behalf
Of Mark Steitle
Sent: Monday, December 17, 2007
8:06 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: EC-2
troubles
Steve,
The odd thing
is that this is a tractor and the controller is mounted on the cabin side of
the firewall. The EM-2 is mounted about a foot away. I have
separated the injector wires and the coil wires from the rest. There's a
ground block located between the two with a connection through the firewall to
another ground block and engine ground. Batteries are in the back
though. There's a #2 welding cable going from the ground block to the
battery. It routes down the right side away from all the smaller
wires.
The nav/com
is mounted near the EM-2 and could possibly be the culprit, based on Al's
recommendations. The EM-2 display is right above the nav/com. Maybe
I need to move the nav/com to the back of the plane?
Mark S.
On 12/17/07, Steve Brooks
<cozy4pilot@gmail.com> wrote:
Mark,
That's
one problem that I haven't had. I do recall a discussion though because
several people flying the "plastic" planes had problems with the data
getting corrupted. I think that I lucked out because I ran all of my
wiring down the passenger side wiring channel. By the time it came to do
the controller, the channel was full, so it runs down the pilot's side pretty
much by itself. The only other thing in the channel other than the EC2
wiring are the headset intercom wires, which are shielded.
Steve
Brooks
-----Original Message-----
From: Rotary motors
in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Sunday,
December 16, 2007 6:51 PM
To: Rotary motors in
aircraft
Subject: [FlyRotary] EC-2 troubles
Tracy,
To refresh your memory, I recently installed the solid state staging relay on
my 20B Lancair ES. When doing the install, I didn't reinstall the diode
(to ground). During a short test flight after installing the solid state
relay, the map table got corrupted. I wrote for your advice and you
instructed me to connect the diode. I reinstalled the diode to the
staging relay and went for a short 30 minute flight today. The
"A" map table again got corrupted. Switching to the
"B" controller resulted in a smooth running engine. After
landing, I entered the EM-2 tracking mode and it was obvious that the
"A" map table was again corrupted. I have not reloaded
the default map, in case you would like to take a picture of the EM-2 display
of the map table.
These are the only two instances of this happening that I can recall, both
cases happened after I installed the solid state injector staging relay.
Could the relay possibly be related?
Also, I understand that others with composite a/c have had problems similar to
this (sporatic corruption of the MAP table). Have you been able to
determine a common cause? Any suggestions?
I am posting this to the fly rotary group in hopes that someone on the list may
have already "been there, done that".
Thanks,
Mark S.