Steve,
I am a pretty well defined dork when it
comes to herding electrons, but pins 16, 7, & 27 appear to be the ground,
in and out for the serial connection to the EM-2. So to make the connection
to the computer cable, I could tap these three wires and connect them to the
indicated computer cable wires and it would work? It appears that the
green and brown wires may be connected together as well?
I can get the computer cable where?
Radio Shack?
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Steven W. Boese
Sent: Thursday, January 24, 2013
5:46 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Hiccup!
Bill,
If you think the problem is with the EC2
signals, an example of examining those signals is shown in the following web
site:
www.rotarycopilot.com/
in the Start Up Sequence discussion in the
Documents section. Although this discussion dealt with an issue that has
since been resolved, the data collection and examination methodology may be
helpful for your situation. Using this would depend on being able to
collect data during the time that the problem occurred which might take
some effort if the problem doesn't happen very often.
It may also be worthwhile to consider setting
up the monitoring system described in the Software section of the same website.
This system was developed to troubleshoot my EC2 installation and enables
one to verify the operation of the EC2 controls (among other
things). In my case, there was a cold solder joint on one of the pins of
the mixture control potentiometer of the control board resulting in an
intermittent connection. Watching the EC2 output as the mixture
control setting was changed made the problem obvious. The engine didn't
even need to be running to find the problem.
Let me know if you want more
details.
RV6A, 1986 13B NA, RD1A, EC2
From: Rotary
motors in aircraft [flyrotary@lancaironline.net] on behalf of
Bill Bradburry [bbradburry@bellsouth.net]
Sent: Thursday, January 24, 2013
3:09 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Hiccup!
Well the hiccup is much worse now!
In fact it is no longer a hiccup. I misses a string of 3-4 in a row and
loud backfires! It seems that it is electrical in nature as the mixture
was pretty well centered the whole time and turning the mixture knob
didn’t seem to help.
I am thinking about rewiring the entire
system, but I am somewhat concerned that I may just screw up something that is
not broken.
Didn’t there used to be someone on
the list that built wire harnesses for the EC-2?
Suggestions welcomed!
Bill B