From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: My EMI journey continues.
Message-Id: <CBF2A09F-DAD0-4A3F-B9F4-F957C2A9254D@gmail.com>
Date: Tue, 21 Jan 2020 12:44:59 +0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Hi Guys

I got a few hours on the Glasair this morning.

Last week after soldering 100nF caps across pin 1&2 of EC2, I couldn=E2=80=
=99t start the engine on either controller.???!!!

I checked the EC2 today and found the Earth Stud on the case was a =
little loose, so I tightened it up.

Engine then started fine and ran on both controllers. One small step for =
man=E2=80=A6..
On Radio tx, NO stumble on either controller! Another small step for =
man=E2=80=A6.

BUT on running up the engine ONE great big step backwards=E2=80=A6..

Slowly increasing the RPM yields a very consistent engine cutout at just =
over 5000 rpm on both controllers.
At say 3000 and stabbing the throttle yields the same result.
If I pull the throttle quickly when it cuts out, it sometimes would =
recover. Otherwise it stalled completely.

I can help but feel the caps are the culprit.
Didn't have time to pull the EC2 and test.
I would like to remove 100nF and retest.
Then I=E2=80=99m tempted to replace with 10nF and retest.

OR I could just remove the caps and put some Ferrites on the leads going =
into the EC2.

The RF getting into the ADHARS has, it appears been attenuated =
significantly by 2 ferrites on the cables entering the unit and the =
subsequent reduction in VS indicated on radio tx.

Till next time=E2=80=A6..

Steve Izett

=20


=20=