X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=LuPsNUVc c=1 sm=1 tr=0 a=Ng7zDSc6qTH8qcjKLJdjPw==:117 a=sTwFKg_x9MkA:10 a=d_30a814dLcA:10 a=r77TgQKjGQsHNAKrUKIA:9 a=Ia-xEzejAAAA:8 a=o1OHuDzbAAAA:8 a=7g1VtSJxAAAA:8 a=Fzd8NNABV8-e3aC1IAkA:9 a=rdqyLi5kIfE_S67v:21 a=ItY-CBkdbEffNQ1m:21 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=4PR2P7QzAAAA:8 a=NmiPa6sh7uLCCBwdM6MA:9 a=QpQhubDtwWGR8vi5:21 a=cSw8I_oa_zoi2jyy:21 a=hjYQM5ItUSshf9ri:21 a=frz4AuCg-hUA:10 a=_W_S_7VecoQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=5YQ6H4ZxyGn-KoBYtt8s:22 a=grOzbf7U_OpcSX4AJOnl:22 a=4dqwQCo7Po2mVW515mGf:22 From: "Finn Lassen finn.lassen@verizon.net" Received: from sonic304-21.consmr.mail.ne1.yahoo.com ([66.163.191.147] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 252073 for flyrotary@lancaironline.net; Mon, 18 May 2020 14:43:32 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.163.191.147; envelope-from=finn.lassen@verizon.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=verizon.net; s=a2048; t=1589827395; bh=PKbn17WtTB0wKMIRFkmJsMVMtjYBzNeYcN48cnHNUKU=; h=Subject:To:References:From:Date:In-Reply-To:From:Subject; b=KGNAMdVHq0S7zBS2i61B1X2KrNrEJLBL+5AoBWl0CFP7OTIZfv0A7XI7NdHVrhLag35hYXqXvVecXofZIVCnd0bXGj51zccTiZ3pPhqkGEU6pE1e8AYOSd0ds93KoWPM5uvcGoncNz5XrlzTSrcD8zb+bmoSBLf7I2vFOmucy+wdat/d6aL4mhu558lmIPez2X9JhWmxHoCIe/JATZO5skdKzePLvsqmWNJuT7rxHOJuKQNALI93zHxrCQ4A6He+2V+4MNUJu+7Hm+87QX5jt1JowkJsuFmqrLtGqV6LcwBbaBBRib9mlD4aE4xM9G+sujhKo75BbkJh4ZCgtYepAw== X-YMail-OSG: oyarNPAVM1meNtMXKhh3c1LIJ3FLlEXg4YCEDTylGmnlj17pnMSQpkGdS3mZX5T KYTqKpZz1GfxNHEvF3p15CrsCJy2WjHIwCiAK2O0iKD_Y2LoqSVoeeQ2WkZwmys9ElxArhOMJU6o qT82TVgvdTKo6GCEK3tbZFZaYkwpFvr.apPiD1CVvBo9_7DFaBKQy0Oys1pb8IPyhm2SDJ1qZHF8 H_DgG1PjQHXEcc.iJgjGtLABJgEzhRNmW23INGVpcj6qftPhDewHhxr0K8CcFSQyTRc28rZAHDgY 8USL_F3yVwtWQ3ql00qTkDJ7MjUdH1l7pEr5w4DmDbJZeC1H_EUEqfETRphfyhXIeKSY5SNkw8iC eBIQUuhMAD2XfBsfEYTmdO1gi0.oT784vUJCfV3Z_ZcJVpVjjcegwrVGRXDL5k8y1DMqo4bClLT7 0OWmJDUIY9.g4DvgkzTd30UbjVJxbvBXr523Viu577xDLtvke6C4g40CYlqS7ewGfUy4Ws6f7x10 lXrg4XsRtQsJPbc1lKWNEFNipadJ7VxA0mVFqXMiuRBxiB.jb6Nd5TlM9LrjXIzKx3x3mjXHxt4h mLNXCvZ15YoKBSuaMMO4WX5uCJ6L6fgLPR0RYPqS7OBxyQSDEpvLI0DvInctBSQTu_OQPseO0OQN 0f35C.bbsKZUh9Pe8bMbppf3_Xta1JFKriPzxWd.yycAKHeVgbRqqy924qZXGA7ykY22W6WsqXxr xT98KXyCnLl8PgSO1g1v665u5gqzNpOhLmgX3ssODZvSgCPmVrXxss1Mt3lAPKjMa90IFvoAEtdq e3XKtj7LZpH9K4ApBgDsTfo2BCfDscTZ2nwSdbmQnnAQK38kqsecEXF_hWve9qE40EXeSSkQd8_o 7AeHHVBnM9APxHPb3UmDqDH7OISFBDXJBrCqNdYODAz9fk8obdsl2e7bH_Dl0KayhZagJow7vF_O a_wdWnqec7iRxj4oVVcPSTDYCtxW7laa.7LnEFJWRM7ejrHkSOInbIhsBa736N3JoAruPxjBvp2X obkzMPCtnPuEL7Y7dtlrjM6LeWczh3ZeixzLqvnnvEwfJp94CWAUmEu36IVD8.GgOScFBT2c5mOM fYLuuCEHkCY7wD.BO6YcG2yKrIRADTsytv.f5Lbcvmjx.5vLE14ylRtY6hDIEUbC8qj3787lXmPb 5ghvjKzWfZ.RJZ9bcud.hyz4iciKAG.eYPnbhUahHUq1_B42K7LTnwZpK3HMEl8cCF5LG7DrX1Gx Xw_WKKJzQvOvR42YT2GtE9sUGQuqjP6VE5EfbFh.eLkwdphHyBJNCn48XJbrZH017Mx8332Fwht_ luCc7t_AwXfyAwMubMy.Hwf01VZfuW1byCx2vyPY.VPI7VKQUUPp9VyPUtzL_f_LKjZwulTkHRge .UMAiLwk5lL2k1w_0hZcehlISggzHXgEifayXrWhh4Dp3fjrv Received: from sonic.gate.mail.ne1.yahoo.com by sonic304.consmr.mail.ne1.yahoo.com with HTTP; Mon, 18 May 2020 18:43:15 +0000 Received: by smtp411.mail.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 4d8cacdb23366d1b287cd4f9e4e2cd19; Mon, 18 May 2020 18:43:12 +0000 (UTC) Subject: Re: [FlyRotary] Re: O2 sensor location To: Rotary motors in aircraft References: Message-ID: <0ff369cd-1200-3570-22f3-fa3e40e4849c@verizon.net> Date: Mon, 18 May 2020 14:43:06 -0400 User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/alternative; boundary="------------D1AA9763F68874CB4876CE1F" Content-Language: en-US X-Mailer: WebService/1.1.15960 hermes_aol Apache-HttpAsyncClient/4.1.4 (Java/11.0.6) Content-Length: 8017 This is a multi-part message in MIME format. --------------D1AA9763F68874CB4876CE1F Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit 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 > ◆ 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 °C (1700°F). > > 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° 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/List.html --------------D1AA9763F68874CB4876CE1F Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
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 <flyrotary@lancaironline.net> on behalf of Finn Lassen finn.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
 
◆ 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 °C (1700°F).

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° 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



--
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