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Date: Fri, 20 May 2005 10:18:43 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Joseph M Berki <Joseph.M.Berki@grc.nasa.gov>
Subject: Re: [FlyRotary] Re: More MAP measurement questions
Cc: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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Hi John,
         I have been tracking your progress on the EC2.  One thing about 
using shielded cables.  Both ends need to be grounded and do not use the 
shield as a conductor for any function.  Data running in adjacent cables 
can be corrupted by currents in cables next      to them.  If the shields 
are not grounded at both ends you have created an antenna.  Good luck.

Joe Berki
Limo EZ
fixing strake leading edges



At 09:58 AM 5/20/2005 -0400, John Slade wrote:
>Here's another question - having little knowledge in the area, I'm 
>considering Tracy's ECU and the EM2.
>What are your appreciations of the products.
>
>Hi George,
>I've had horrendous problems getting the EM2/EC2 working. Much, if not 
>all, of the problems have probably been to do with my wiring, not RTFM 
>properly (ie grounding the wrong wire), not using shielded cable for 
>everything, not mounting the Program Control Module properly, long cable 
>runs, etc. etc. After many many months of sporadic results, I'm still 
>fighting with it. I have 30 hours on the plane, and I have to say that 
>despite all these issues, the EC2 has never let me down in flight. 
>Hiccupped, yes, but silence - never. My wiring harness tests out 
>perfectly, but still no joy. The EC2 won't communicate with the EM2, and 
>won't trigger a spark. I'll be doing a definitive test later today by 
>doing what I should have done months ago, and installing my EC2 in Buly's 
>identically configured airplane. THEN we'll know.
>
>Despite the severe frustration and delay caused by all this, I really HATE 
>to consider the alternative of an aftermarket ECU like the Microtech where 
>installing redundancy will be a real bear and the total solution will be a 
>lot more expensive and complex (read fault prone). I'd also prefer to 
>continue supporting Tracy's efforts for the benefit of rotary aviation in 
>general. I think he'd rather be rid of me, but I just aint going away. :)
>
>On the EM2, I much prefer analog input for quick glance confirmation and 
>trend info, but its well worth the cost and panel space to have ALL the 
>data available when you have time to study it, the graphic access to the 
>EC2 MAP data, and the range warnings working for you in the background. I 
>installed 6 analog engine gauges (coolant temp & pressure, oil temp & 
>pressure, MAP and Fuel pressure) alongside the EM2 which allow me to do a 
>scan and also confirm calibration / sensor failure.  The promised autotune 
>and data-logging features of the EM2 will be worth the cost on their own.
>
>One advantage some of the aftermarket units apparently have is a built-in 
>timing split to help avoid detonation with turbo installations (a subject 
>very close to my heart and wallet). Tracy has promised to add this 
>feature, but he's busy with a lot of stuff so I don't know when that'll 
>happen. This isn't an issue for NA people.
>
>All issues considered, if I were doing it again, I'd buy the EM2/EC2 
>combination in an injection pulse width. (rotary equivalent of a New York 
>second).
>
>John (desperately hoping my EC2 fires up Buly's engine, but fueling up my 
>car in case it doesn't)

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Content-Type: text/html; charset="us-ascii"

<html>
Hi John,<br>
<x-tab>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</x-tab>I have
been tracking your progress on the EC2.&nbsp; One thing about using
shielded cables.&nbsp; Both ends need to be grounded and do not use the
shield as a conductor for any function.&nbsp; Data running in adjacent
cables can be corrupted by currents in cables
next&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; to them.&nbsp; If the shields are not
grounded at both ends you have created an antenna.&nbsp; Good
luck.<br><br>
Joe Berki<br>
Limo EZ<br>
fixing strake leading edges<br><br>
<br><br>
At 09:58 AM 5/20/2005 -0400, John Slade wrote:<br>
<blockquote type=cite class=cite cite><font face="arial" size=2>Here's
another question - having little knowledge in the area, I'm considering
Tracy's ECU and the EM2.</font><font face="arial" size=2 color="#0000FF">
</font><br>
<font face="arial" size=2>What are your appreciations of the
products.</font><font face="arial" size=2 color="#0000FF"> </font><br>
&nbsp;<br>
<font face="arial" color="#0000FF">Hi George,</font><br>
<font face="arial" color="#0000FF">I've had horrendous problems getting
the EM2/EC2 working. Much, if not all, of the problems have probably been
to do with my wiring, not RTFM properly (ie grounding the wrong wire),
not using shielded cable for everything, not mounting the Program Control
Module properly, long cable runs, etc. etc. After many many months of
sporadic results, I'm still fighting with it. I have 30 hours on the
plane, and I have to say that despite all these issues, the EC2 has never
let me down in flight. Hiccupped, yes, but silence - never. My wiring
harness tests out perfectly, but still no joy. The EC2 won't communicate
with the EM2, and won't trigger a spark. I'll be doing a definitive test
later today by doing what I should have done months ago, and installing
my EC2 in Buly's identically configured airplane. THEN we'll
know.</font><br>
&nbsp;<br>
<font face="arial" color="#0000FF">Despite the severe frustration and
delay caused by all this, I really HATE to consider the alternative of an
aftermarket ECU like the Microtech where installing redundancy will be a
real bear and the total solution will be a lot more expensive and complex
(read fault prone). I'd also prefer to continue supporting Tracy's
efforts for the benefit of rotary aviation in general. I think he'd
rather be rid of me, but I just aint going away. :)</font><br>
&nbsp;<br>
<font face="arial" color="#0000FF">On the EM2, I much prefer analog input
for quick glance confirmation and trend info, but its well worth the cost
and panel space to have ALL the data available when you have time to
study it, the graphic access to the EC2 MAP data, and the range warnings
working for you in the background. I installed 6 analog engine gauges
(coolant temp &amp; pressure, oil temp &amp; pressure, MAP and Fuel
pressure) alongside the EM2 which allow me to do a scan and also confirm
calibration / sensor failure.&nbsp; The promised autotune and
data-logging features of the EM2 will be worth the cost on their own.
</font><br>
&nbsp;<br>
<font face="arial" color="#0000FF">One advantage some of the aftermarket
units apparently have is a built-in timing split to help avoid detonation
with turbo installations (a subject very close to my heart and wallet).
Tracy has promised to add this feature, but he's busy with a lot of stuff
so I don't know when that'll happen. This isn't an issue for NA
people.</font><br>
&nbsp;<br>
<font face="arial" color="#0000FF">All issues considered, if I were doing
it again, I'd buy the EM2/EC2 combination in an injection pulse width.
(rotary equivalent of a New York second).</font><br>
&nbsp;<br>
<font face="arial" color="#0000FF">John (desperately hoping my EC2 fires
up Buly's engine, but fueling up my car in case it
doesn't)</font></blockquote></html>

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