X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=XpSExmN9 c=1 sm=1 tr=0 a=ABnyeOfwp/SHlX+YrFrOCA==:117 a=Dt7kjH6uOUWjugfrcxWrLQ==:17 a=3YhXtTcJ-WEA:10 a=x7bEGLp0ZPQA:10 a=CKeqCrOqW6IA:10 a=o1OHuDzbAAAA:8 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=_6GpL_ENAAAA:8 a=7g1VtSJxAAAA:8 a=oyDQt2dSAAAA:8 a=WpewYatz5rb3HgMxzwYA:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=lrsIwZYKso8A:10 a=gvSQh4r-fQ0A:10 a=4PR2P7QzAAAA:8 a=lrToEJUJEi8X_Jv85_EA:9 a=zhIiWNYHrt8Z8SCu:21 a=_W_S_7VecoQA:10 a=oHtJogR6AwIA:10 a=5YQ6H4ZxyGn-KoBYtt8s:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 a=nY2paJTkNLOyQSZ-TCso:22 a=4dqwQCo7Po2mVW515mGf:22 From: "Stephen Izett stephen.izett@gmail.com" Received: from mail-pj1-f41.google.com ([209.85.216.41] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1461807 for flyrotary@lancaironline.net; Wed, 28 Apr 2021 20:53:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.216.41; envelope-from=stephen.izett@gmail.com Received: by mail-pj1-f41.google.com with SMTP id f2-20020a17090a4a82b02900c67bf8dc69so9978195pjh.1 for ; Wed, 28 Apr 2021 17:53:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:mime-version:subject:date:references:to:in-reply-to:message-id; bh=Fk7zNjM3YjUBBVyOfiLfIhSX/5QhCHRdJkm4vigjV48=; b=oEtUERT8qCNpS91ZpY6QfigZOtsKpguU9KSdJ47uq7+RW3QX6etM2w217FjU9e4mEF MNsioUGLTLuCLTwFplfI2jxIjhKhJ5EIKSmSgENRt4SKmz1K9ehdPmCq4NhU/I8/20OP gcwX6bM3jakeNQwhpVt90m6Tv58beMOjw5yhsj5RMFpxJlJTZizG5DQ0bwBwIIp7quQK lkyB4xUjvc1wPll7Ac4GP4CxSqtEEqT/gFjihD3rTpDkvWojhu86Ierc2GJfgRvAM8dY X4/FNJb17nlFDFrhXXoOheL6YT+qm/J484d+70B1J4/DWHAHQTnSR4GUSxPxx5LnFF+c KA7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:mime-version:subject:date:references:to :in-reply-to:message-id; bh=Fk7zNjM3YjUBBVyOfiLfIhSX/5QhCHRdJkm4vigjV48=; b=R7AIQutXbS20laNaA1YGnnSZdLv8AvkwyYjvVVVk7ijwzrSdRFXx9tMhys2W/w3QI2 23mDNtmtCah+vNwhpEhyBhOpgXQgefnbYEJuvRIq+iUuR3tjw3AtQ3HVePkeFJBya/yd b0ZXYEZiU252H1RAEWIf2xD/wZpF0ncoJ8VIEdJAetkVmI9EpnVBXsCEUp2R6nXddek9 eo/ZsPl/RewhbA6RTeRq9XDRMLL2FSH23t/hXz6aJ9BNRLUyhieKxtR7p9J+GUz/XcNM ovS0KmxAczSLDf+1Ll1mpfKNxBC9zprX+dlGs8LpLEGC/+dmWYdm/+KzyfwypK8BW0tA 3kMA== X-Gm-Message-State: AOAM533A7/U2WpYsS+x5MOAny1vVibhlh4JOnSyg1+DJjXYavbAcvDjP GBh7bx1E9UaY/4o4RzbXmnTVl5np7Jc= X-Google-Smtp-Source: ABdhPJzI1O7CWdvSIzZ6PzKQJwOvpVeBx7H6RZTdavEsRhKyD5CDaV+sv0hTnF4NOFOBw82Fpp+niQ== X-Received: by 2002:a17:902:b095:b029:ed:46af:e33f with SMTP id p21-20020a170902b095b02900ed46afe33fmr14972844plr.23.1619657582994; Wed, 28 Apr 2021 17:53:02 -0700 (PDT) Return-Path: Received: from stephens-mbp.lan (220-235-121-235.dyn.iinet.net.au. [220.235.121.235]) by smtp.gmail.com with ESMTPSA id f18sm804863pfk.144.2021.04.28.17.53.01 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 28 Apr 2021 17:53:02 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_62E2DAC2-7A92-4F6D-829D-C99603D823DD" Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.60.0.2.21\)) Subject: Re: [FlyRotary] EGT probes location Date: Thu, 29 Apr 2021 08:52:59 +0800 References: To: Rotary motors in aircraft In-Reply-To: Message-Id: <0B3E9EEB-64CA-4FE3-9B29-FDB7FEC43BDA@gmail.com> X-Mailer: Apple Mail (2.3654.60.0.2.21) --Apple-Mail=_62E2DAC2-7A92-4F6D-829D-C99603D823DD Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 I haven=E2=80=99t tried to balance my rotors yet and was hoping to at = some point soon. Your thought about doing so with RPM and FF sounds worth trying. It would be nice to have a balanced and lighter manifold, however I = really appreciate the robustness and safety of that OEM hunk of layers. Steve > On 29 Apr 2021, at 8:43 am, Finn Lassen finn.lassen@verizon.net = wrote: >=20 > Thanks Neil, Steve, Matt and Charlie. >=20 > I did try to get tip of probes centered in the openings, but now I = remember that a very slight difference made a significant difference in = readings during initial engine runs. >=20 > So I think I'll ignore it for now (and set the alarm higher). Then = later on I can try to adjust the front/rear rotor fuel ratio. Perhaps = watching fuel flow vs RPM will be a better way to optimize this? >=20 > Definitely a disadvantage to using the stock exhaust manifold. The = ideal setup would probably be separate (outer) runners, perhaps with an = O2 sensor in each runner. >=20 > Finn >=20 > On 4/28/2021 7:21 PM, Matt Boiteau mattboiteau@gmail.com = wrote: >> Cyl 1 will be hotter since it gets the coolant the last. I can be = anywhere from 50-100f difference sometimes. >>=20 >> I think too, with our high temperatures, the accuracy of the probes = probably have a good amount of +/- in there. >>=20 >> - Matt Boiteau >>=20 >>=20 >> On Wed, Apr 28, 2021 at 7:15 PM Stephen Izett stephen.izett@gmail.com = > wrote: >> Hi Finn >>=20 >> Yes.=20 >> An example of our EGT=E2=80=99s at WOT take off - Lambda ~0.9 / AFR = 13.3=20 >> 1598 & 1679 - So 81 higher. >> I=E2=80=99m not sure our EGT probes are inserted exactly the same = distance into the header.=20 >> Not sure the variation in temp this might cause. >> One of our probes is burnt out now. >>=20 >> Cheers >>=20 >> Steve Izett >>=20 >>=20 >> > On 29 Apr 2021, at 5:30 am, Finn Lassen finn.lassen@verizon.net = > wrote: >> >=20 >> > So, I'm using the Renesis stock exhaust manifold. >> >=20 >> > Tried to mount the EGT probes as close as possible and same = distance from the ports. >> >=20 >> > However, at high power I'm seeing as much as 120F higher on rotor = 2. >> >=20 >> > Exhaust gas from rotor 1 passes by rotor 2 exhaust port so I'm = wondering if that somehow increases rotor 2 EGT readings. >> >=20 >> > Caught my attention today when EGT2 got above 1,800F at 6,200 RPM = and 161 mph TAS @ 3,300' density altitude. >> >=20 >> > Any of you that's using the stock exhaust manifold run into this? >> >=20 >> > Finn >> >=20 >> >=20 >> > --- >> > This email has been checked for viruses by Avast antivirus = software. >> > https://www.avast.com/antivirus >> >=20 >> >=20 >> > -- >> > Homepage: http://www.flyrotary.com/ >> > Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html = >>=20 >>=20 >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: = http://maillancaironline.net:81/lists/flyrotary/List.html = >=20 >=20 >=20 > =09 > This email has been checked for viruses by Avast antivirus software.=20= > www.avast.com > --Apple-Mail=_62E2DAC2-7A92-4F6D-829D-C99603D823DD Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 I = haven=E2=80=99t tried to balance my rotors yet and was hoping to at some = point soon.
Your thought about doing so with RPM and FF = sounds worth trying.
It would be nice to have a = balanced and lighter manifold, however I really appreciate the = robustness and safety of that OEM hunk of layers.
Steve

On 29 = Apr 2021, at 8:43 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:

=20 =20
Thanks Neil, Steve, Matt and = Charlie.

I did try to get tip of probes centered in the openings, but now I remember that a very slight difference made a significant difference in readings during initial engine runs.

So I think I'll ignore it for now (and set the alarm higher). Then later on I can try to adjust the front/rear rotor fuel ratio. Perhaps watching fuel flow vs RPM will be a better way to optimize this?

Definitely a disadvantage to using the stock exhaust manifold. The ideal setup would probably be separate (outer) runners, perhaps with an O2 sensor in each runner.

Finn

On 4/28/2021 7:21 PM, Matt Boiteau mattboiteau@gmail.com = wrote:
Cyl 1 will be hotter since it gets the = coolant the last. I can be anywhere from 50-100f difference sometimes.

I think too, with our high temperatures, the accuracy of the probes probably have a good amount of +/- in there.

- Matt Boiteau


On Wed, Apr 28, 2021 at = 7:15 PM Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
Hi Finn

Yes.
An example of our EGT=E2=80=99s at WOT take off - Lambda ~0.9 = / AFR 13.3
1598 & 1679 - So 81 higher.
I=E2=80=99m not sure our EGT probes are inserted exactly the = same distance into the header.
Not sure the variation in temp this might cause.
One of our probes is burnt out now.

Cheers

Steve Izett


> On 29 Apr 2021, at 5:30 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>
> So, I'm using the Renesis stock exhaust manifold.
>
> Tried to mount the EGT probes as close as possible and same distance from the ports.
>
> However, at high power I'm seeing as much as 120F higher on rotor 2.
>
> Exhaust gas from rotor 1 passes by rotor 2 exhaust port so I'm wondering if that somehow increases rotor 2 EGT readings.
>
> Caught my attention today when EGT2 got above 1,800F at 6,200 RPM and 161 mph TAS @ 3,300' density altitude.
>
> Any of you that's using the stock exhaust manifold run into this?
>
> Finn
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html<= br class=3D"">

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