From: "Tracy Crook" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.218.53; envelope-from=rwstracy@gmail.com
Content-Type: text/plain;
	charset=utf-8
Content-Transfer-Encoding: quoted-printable
Mime-Version: 1.0 (1.0)
Subject: Re: [FlyRotary] Re: Further testing
Message-Id: <1FA00E18-9B1D-4CEA-A267-51FD5EF66AE3@gmail.com>
Date: Sat, 30 Jul 2016 20:07:06 -0700
References: <list-8836094@logan.com>
In-Reply-To: <list-8836094@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

Yes, the spell correction gods messed with my spelling.  Should read 1000 oh=
ms across the CAS.

Tracy

Sent from my iPad

> On Jul 29, 2016, at 20:27, Stephen Izett <flyrotary@lancaironline.net> wro=
te:
>=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> wr=
ote:
>>=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 e=
c2 was designed well before the Renesis came out so the sense input circuit i=
s not well matched to the Renesis CAS.   Plus, there are at least 4 differen=
t 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 p=
ath, either at the CAS or at the ec2.
>>=20
>> There were also some internal retrofit changes I made for ec2 / Renesis u=
sers.  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> wro=
te:
>>>=20
>>> Hi Guys
>>>=20
>>> We did further testing of the Renesis today. Would really appreciate you=
r heads on this.
>>> Last series of tests we had this major missing and noise which I think i=
s fuel exploding in the exhaust.
>>> This happens at various RPM=E2=80=99s based on load from the adjustable p=
rop.
>>> With fine pitch it would spin out to just over 7000rpm before striking t=
his 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 mixtur=
e is doing during the episodes.
>>>=20
>>> Also still having trouble with the EM3. Sometimes display reads what app=
ears 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 incorr=
ectly fed the injector pulse to the lower voltage input, but this made no di=
fference.
>>>=20
>>> I had wondered if the secondary injectors weren=E2=80=99t getting power a=
nd 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 s=
econdaries I was able to ascertain that the secondaries appear to be functio=
ning 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 sign=
al to the EC2.
>>> Sorry Ed, you might have had it right last week. I thought because it wa=
s 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 mani=
fold signal tap position!
>>>=20
>>> Ed, you mentioned either small orifice or accumulator. I estimate the vo=
lume of the signal line to be approx 18 cubic centimetres.
>>> My gut was that the accumulator required to damp the signal would need t=
o 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 t=
o 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 t=
o damp out the pulses.
>>>=20
>>> Can I ask the group please. Who had trouble with manifold signal and wha=
t was the solution that worked best.
>>> Paul Lamar advocates tapping the signal from the oil injection ports. Ha=
s/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
>>> --
>>> Homepage:  http://www.flyrotary.com/
>>> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/Li=
st.html
>>=20
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/Lis=
t.html
>=20
>=20
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List=
.html