From: "steve Izett" <flyrotary@lancaironline.net>
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Subject: Further testing
Message-Id: <087767A9-EE1A-4C15-90DB-15EE96FA3239@gmail.com>
Date: Fri, 29 Jul 2016 17:19:33 +0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Hi Guys

We did further testing of the Renesis today. Would really appreciate =
your heads on this.
Last series of tests we had this major missing and noise which I think =
is fuel exploding in the exhaust.
This happens at various RPM=E2=80=99s based on load from the adjustable =
prop.
With fine pitch it would spin out to just over 7000rpm before striking =
this mayhem.
With medium pitch it would get to 6000rpm before the same symptoms.
=46rom memory these were both at about 22-23 inches of Hg.
My Wideband O2 is malfunctioning at present.=20
The narrowband response time appears to slow to discover what the =
mixture is doing during the episodes.

Also still having trouble with the EM3. Sometimes display reads what =
appears to be an error message and at other times stops reading RPM.
The Skyview Engine monitor has the same issue at the same RPM so appears =
directly related.
I changed the input on the Skyview to the Standard RPM input as I =
incorrectly fed the injector pulse to the lower voltage input, but this =
made no difference.

I had wondered if the secondary injectors weren=E2=80=99t getting power =
and as a consequence when it staged to all 4 injectors the trouble =
began.
Using the EM3 display (staging asterisk) and switching power off to the =
secondaries I was able to ascertain that the secondaries appear to be =
functioning fine.
I did notice that the point of staging appears to be not solid.
This takes me back to Ed=E2=80=99s comments re damping the manifold =
signal to the EC2.
Sorry Ed, you might have had it right last week. I thought because it =
was running so smoothly up to 23 inches that it wasn=E2=80=99t a signal =
issue.
Maybe the wavelength/timing of those pulses at ~6000rpm matches the =
manifold signal tap position!

Ed, you mentioned either small orifice or accumulator. I estimate the =
volume of the signal line to be approx 18 cubic centimetres.
My gut was that the accumulator required to damp the signal would need =
to be an order of magnitude larger. (total guess)
So maybe 180 cc=E2=80=99s but thats half a Coke can! Seem=E2=80=99s way =
to big.
Ed, did I understand you right that a small fuel filter can do the =
trick? I thought they would only be about 10 cc=E2=80=99s in volume.
I suppose if the pulses are very narrow/short maybe thats all to takes =
to damp out the pulses.

Can I ask the group please. Who had trouble with manifold signal and =
what was the solution that worked best.
Paul Lamar advocates tapping the signal from the oil injection ports. =
Has/is anyone using this solution?

Thanks very much everyone.

Steve Izett
Glasair Super II RG
Reneis 4 port EC2 EM3 RD1-C


 =20