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.