From: "steve Izett" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Further testing
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Date: Sun, 31 Jul 2016 14:12:22 +0800
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Thanks
Steve
> On 31 Jul 2016, at 11:07 AM, Tracy Crook <flyrotary@lancaironline.net> =
wrote:
>=20
> Yes, the spell correction gods messed with my spelling.  Should read =
1000 ohms across the CAS.
>=20
> Tracy
>=20
> Sent from my iPad
>=20
>> On Jul 29, 2016, at 20:27, Stephen Izett =
<flyrotary@lancaironline.net> wrote:
>>=20
>> Thanks Tracy
>> Your "1000 Pham=E2=80=9D I take it is 1K resistor across the CAS =
pins.
>> Steve
>>> On 30 Jul 2016, at 11:21 AM, Tracy Crook =
<flyrotary@lancaironline.net> wrote:
>>>=20
>>> Hi Steve,
>>> Just another possibility FWIW.
>>>=20
>>> The symptom of acting different with different pitch settings of the =
prop does not fit this possibility but most everything else does. =20
>>>=20
>>> Several ec2 users had similar problems when using it n the Renesis.  =
The ec2 was designed well before the Renesis came out so the sense input =
circuit is not well matched to the Renesis CAS.   Plus, there are at =
least 4 different versions of the ec2 so that complicates things as =
well. =20
>>>=20
>>> If the MAP sensor tap  changes don't help,you might try installing a =
1000 Pham resister IN PARALLEL with the CAS .  This could be anywhere =
along the path, either at the CAS or at the ec2.
>>>=20
>>> There were also some internal retrofit changes I made for ec2 / =
Renesis users.  I can't remember whether you have had them or not.=20
>>>=20
>>> Tracy
>>>=20
>>>=20
>>>=20
>>> Sent from my iPad
>>>=20
>>>> On Jul 29, 2016, at 03:19, steve Izett =
<flyrotary@lancaironline.net> wrote:
>>>>=20
>>>> Hi Guys
>>>>=20
>>>> 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.
>>>>=20
>>>> 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.
>>>>=20
>>>> 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!
>>>>=20
>>>> 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.
>>>>=20
>>>> 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?
>>>>=20
>>>> Thanks very much everyone.
>>>>=20
>>>> Steve Izett
>>>> Glasair Super II RG
>>>> Reneis 4 port EC2 EM3 RD1-C
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>> --
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>>>=20
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>>=20
>>=20
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>=20
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