X-Virus-Scanned: clean according to Sophos on Logan.com From: "Bobby J. Hughes" Received: from [207.91.159.28] (HELO barracuda.qnsi.net) by logan.com (CommuniGate Pro SMTP 6.2c3) with ESMTP id 9736520 for flyrotary@lancaironline.net; Tue, 09 May 2017 11:24:49 -0400 Received-SPF: pass receiver=logan.com; client-ip=207.91.159.28; envelope-from=btv1==302008b03fe==bhughes@qnsi.net X-ASG-Debug-ID: 1494343462-02764503bf05a60001-fw4j19 Received: from mail.qnsi.net (qnsi-mail.qnsi.net [10.0.0.5]) by barracuda.qnsi.net with ESMTP id 1jtjx5xGUPwrP051 for ; Tue, 09 May 2017 10:24:22 -0500 (CDT) X-Barracuda-Envelope-From: bhughes@qnsi.net X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01D2C8D8.55E03BDC" Disposition-Notification-To: "Bobby J. Hughes" Subject: RE: [FlyRotary] F/A and EGT data Date: Tue, 9 May 2017 10:24:22 -0500 X-ASG-Orig-Subj: RE: [FlyRotary] F/A and EGT data Message-ID: <74120FDE88CAFE4DBDA8814BCE20A3F3CDAD7D@qnsi-mail.qnsi.net> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: thread-topic: [FlyRotary] F/A and EGT data thread-index: AdLI1rdJy3fbA+U9TsiAUjTe0nH3rwAAWcFQ References: To: "Rotary motors in aircraft" X-Barracuda-Connect: qnsi-mail.qnsi.net[10.0.0.5] X-Barracuda-Start-Time: 1494343462 X-Barracuda-URL: http://10.0.0.4:8000/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at qnsi.net X-Barracuda-BRTS-Status: 1 X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=1000.0 tests=HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.38707 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 HTML_MESSAGE BODY: HTML included in message This is a multi-part message in MIME format. ------_=_NextPart_001_01D2C8D8.55E03BDC Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Forgot to add that after adjusting mode 4 in cruise my take off setting EGT spread is no longer balanced.=20 =20 Bobby =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20 Sent: Tuesday, May 09, 2017 11:12 AM To: Rotary motors in aircraft Subject: [FlyRotary] F/A and EGT data=20 =20 I recently purchased a two channel portable wideband O2 system and installed bungs and plugs on each exhaust runner. I also have a downstream wideband that I have been using for several years. I was able to spend a very productive hour ground tuning and adjusting Mode 4 injector balance prior to my flight yesterday from Austin to Akron OH. I'm not sure what to make of the F/A EGT spread data I collect during yesterday's flight.=20 =20 During the ground tuning session I balanced rotor 1 to match rotor 2 using F/A ratios for takeoff condition. This produced very close EGT readings. However at my preferred cruise settings I'm seeing a large EGT spread. I would expect a consistent EGT ratio change when adjusting the mixture knob at a steady rpm / MP. This appears not to be the case. What am I missing? =20 =20 Bobby Hughes =20 =20 =20 ------_=_NextPart_001_01D2C8D8.55E03BDC Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Forgot to add that after adjusting mode 4 in = cruise my take off setting EGT spread is no longer balanced. =

Bobby

From:= = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] =
Sent: Tuesday, May 09, 2017 11:12 AM
To: Rotary = motors in aircraft
Subject: [FlyRotary] F/A and EGT data =

I recently = purchased a two channel portable wideband O2 system and installed = bungs and plugs on each exhaust runner. I also have a downstream = wideband that I have been using for several years. I was able to spend a = very productive hour ground tuning and adjusting Mode 4 injector balance = prior to my flight yesterday from Austin to Akron OH. I’m not sure = what to make of the F/A EGT spread data I collect during = yesterday’s flight.

During the = ground tuning session I balanced rotor 1 to match rotor 2 using F/A = ratios for takeoff condition. This produced very close EGT readings. = However at my preferred cruise settings I’m seeing a large EGT = spread. I would expect a consistent EGT ratio change when adjusting the = mixture knob at a steady rpm / MP. This appears not to be the = case. What am I missing?

Bobby = Hughes

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