X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=LuPsNUVc c=1 sm=1 tr=0 a=ccA1FXCYYycThNn3AvCQpg==:117 a=x7bEGLp0ZPQA:10 a=A-0mRrAPPO4A:10 a=sTwFKg_x9MkA:10 a=j0GXybIrAAAA:20 a=_6GpL_ENAAAA:8 a=o1OHuDzbAAAA:8 a=Ia-xEzejAAAA:8 a=7g1VtSJxAAAA:8 a=cAgzeDIFMyxKm1bNWWkA:9 a=htqMv0ioWUN9FPJh:21 a=tV5NCoUp4QR5CHFK:21 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=NmiPa6sh7uLCCBwdM6MA:9 a=RWbtAkPiHPsQDmvb:21 a=0v_zMvUJ7b0BVKF2:21 a=r3-yYJbkEULiXj_l:21 a=5YQ6H4ZxyGn-KoBYtt8s:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Charlie England ceengland7@gmail.com" Received: from mail-io1-f49.google.com ([209.85.166.49] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 252156 for flyrotary@lancaironline.net; Mon, 18 May 2020 15:05:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.166.49; envelope-from=ceengland7@gmail.com Received: by mail-io1-f49.google.com with SMTP id w25so11782197iol.12 for ; Mon, 18 May 2020 12:05:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=DhELikn7SlteJGSAupJPxqg31e0Esw+yuynpsaqhJes=; b=InrgViO3K8cYOqj/p9qmXhrAG0juvuDlvaeOj5MI+2nKJ1yql4SNJv92d/n92NGa+r A7q9BqCuTsUVjR5XDGJAYA7T0qe37NtEtyCpgBbZDLccoO+H3X3yDU6QSXDJXTJPoqOj iZQtvkF9dfUPiuSj9kBzaHmJf3KwEAtTJYrNsEG24GaBXY+1HXQtImjOiVDCogIebP6c K3jz0ZpsC5obP44qkziVyipT6M8IIafBgR7X1+6ZgRxnGyrNUfH986F3+EOV6nuuTs+g StJmPfFivx3ondjVgKPCXyEthoqYQHW2Lo0+T2LmBaGz+60aTMFezxM3TagpHOCxDIaW EN0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=DhELikn7SlteJGSAupJPxqg31e0Esw+yuynpsaqhJes=; b=RHwvE3rSyEvS+2VnlvF9KySrTcrq4Kw6MscyJIGs1MNiEasgd5dZRgf1UJME++aFBQ CZfx1NF0kBzH2U8Jizsp+wPLVFzFRYkzNTI7/c+ce+NEjPU8K7v9JggjameEoU1dCbcQ Qv9Jpm2oePYoW4uReSrevIQ5/hRE2rBYcFl4cBDVV9Cajolj7T0eo/nkx16wkLUjI1Fp Yvbc9WVZVuWSXuIWUTp5TSOOLRUunG5JfRewPPyr0BBx/+lr7nEF6JNdqE94RaxveOdV GIkC36FB98XfJ3uLoaOcmu5oPhDezpoPSIJCFGn+FwI5T/JbzGwdEAWnaLT196BbQGWW X4Ww== X-Gm-Message-State: AOAM531XI9F8nbhIf/C2JaU9pVPE7bswBWEQHUgrc2zjgsVgMVZ8PO2S pRKT1RK4jqfAo8JsK4dJqcxSPRQ+q0jO1KnXzDxFxY6T X-Google-Smtp-Source: ABdhPJzbwNdZHVwZbiQffSM/0VsFMfsfEb53SWkGY0NU9CHlsB2CDbJk9oXmOSTnv2cnOgtdqHA9SqJ7l32/+q/SAN8= X-Received: by 2002:a05:6602:164f:: with SMTP id y15mr7194833iow.210.1589828690694; Mon, 18 May 2020 12:04:50 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Mon, 18 May 2020 13:59:15 -0500 Message-ID: Subject: Re: [FlyRotary] Re: O2 sensor location To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="0000000000005cd88b05a5f0d65e" --0000000000005cd88b05a5f0d65e Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable https://www.google.com/search?q=3Do2+sensor+bung+extension&oq=3Do2+sensor+b= ung+extension&aqs=3Dchrome..69i57j69i65.7765j0j7&sourceid=3Dchrome&ie=3DUTF= -8 Virus-free. www.avast.com <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Mon, May 18, 2020 at 1:43 PM Finn Lassen finn.lassen@verizon.net < flyrotary@lancaironline.net> wrote: > Thanks Steve. > > Hadn't seen that before. > > Work of art! > > But, dang, $89 (or $58 on eBay). Could buy a couple new O2 sensors at > that price. > > Finn > > > On 5/18/2020 12:31 PM, Steven W. Boese SBoese@uwyo.edu wrote: > > Finn, > > FWIW, I've used the bung extender shown in the photos on my test stand > without ill effects other than initial cost. > > Steve Boese > > ------------------------------ > *From:* Rotary motors in aircraft > on behalf of Finn Lassen > finn.lassen@verizon.net > > *Sent:* Monday, May 18, 2020 7:55 AM > *To:* Rotary motors in aircraft > > *Subject:* [FlyRotary] O2 sensor location > > =E2=97=86 This message was sent from a non-UWYO address. Please exercise = caution > when clicking links or opening attachments from external sources. > > > So I bought the Bosch LSU 4.9 wideband oxygen sensor and ALM-board. > > Specs for the LSU 4.9 says max operating temperature is 930 =C2=B0C (1700= =C2=B0F). > > I recall seeing 1950F EGT temps on my 13B with EGT probes 8" from the > side of the engine. > > On the RV-4 Renesis, before buying the wideband sensor, I welded the > bung 12" from the closest port. (Stock manifold cut and 180=C2=B0 turn at > exhaust port nearest flywheel, 2.5" pipe.) > > I expect the Renesis to have slightly lower EGT temps, but am worrying > about damaging the O2 sensor. > > Charlie suggests mounting the sensor on a longer bung, moving the sensor > out of the direct gas stream, but I feel that may reduce the accuracy of > it. > > My plan was to use the cheap narrowband O2 sensor initially and find the > engine settings giving highest EGTs, then temporarily mount an EGT probe > in the O2 bung hole, run the engine at those settings and see if EGT > there was safe for the wideband sensor. > > But maybe I'm worrying about nothing. > > Do any of you have data on how rapidly the temps drop as a function of > distance from exhaust port? > > Finn > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/Lis= t.html > > > Virus-free. www.avast.com <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> --0000000000005cd88b05a5f0d65e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
https://www.google.com/search?q=3Do2+sensor+b= ung+extension&oq=3Do2+sensor+bung+extension&aqs=3Dchrome..69i57j69i= 65.7765j0j7&sourceid=3Dchrome&ie=3DUTF-8=C2=A0=C2=A0
<= /div>

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On Mon, May 18, 2020 at 1:43 PM Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
<= /div>
=20 =20 =20
Thanks Steve.

Hadn't seen that before.

Work of art!

But, dang, $89 (or $58=C2=A0 on eBay). Could buy a couple new O2 sensors at that price.

Finn


On 5/18/2020 12:31 PM, Steven W. Boese SBoese@uwyo.edu wrote:
=20 =20
Finn,

FWIW, I've used the bung extender shown in the photos on my test stand without ill effects other than initial cost.=

Steve Boese

From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of Finn Lassen fi= nn.lassen@verizon.net <flyrotary@lancaironline.net>
Sent: Monday, May 18, 2020 7:55 AM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] O2 sensor location
=C2=A0
=E2=97=86 This message was sent from a non-UWYO address. Please exercise caution when clicking links or opening attachments from external sources.


So I bought the Bosch LSU 4.9 wideband oxygen sensor and ALM-board.

Specs for the LSU 4.9 says max operating temperature is 930 =C2=B0C (1700=C2=B0F).

I recall seeing 1950F EGT temps on my 13B with EGT probes 8" from the
side of the engine.

On the RV-4 Renesis,=C2=A0 before buying the wideband senso= r, I welded the
bung 12" from the closest port. (Stock manifold cut an= d 180=C2=B0 turn at
exhaust port nearest flywheel, 2.5" pipe.)

I expect the Renesis to have slightly lower EGT temps, but am worrying
about damaging the O2 sensor.

Charlie suggests mounting the sensor on a longer bung, moving the sensor
out of the direct gas stream, but I feel that may reduce the accuracy of it.

My plan was to use the cheap narrowband O2 sensor initially and find the
engine settings giving highest EGTs, then temporarily mount an EGT probe
in the O2 bung hole, run the engine at those settings and see if EGT
there was safe for the wideband sensor.

But maybe I'm worrying about nothing.

Do any of you have data on how rapidly the temps drop as a function of
distance from exhaust port?

Finn



--
Homepage:  http://w=
ww.flyrotary.com/
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