X-Virus-Scanned: clean according to Sophos on Logan.com From: "Steven W. Boese" Received: from [207.46.100.121] (HELO na01-by2-obe.outbound.protection.outlook.com) by logan.com (CommuniGate Pro SMTP 6.1.8) with ESMTPS id 8309626 for flyrotary@lancaironline.net; Thu, 07 Jan 2016 11:52:53 -0500 Received-SPF: none receiver=logan.com; client-ip=207.46.100.121; envelope-from=SBoese@uwyo.edu Received: from CY1PR0501MB1147.namprd05.prod.outlook.com (10.160.144.153) by CY1PR0501MB1146.namprd05.prod.outlook.com (10.160.144.152) with Microsoft SMTP Server (TLS) id 15.1.361.13; Thu, 7 Jan 2016 16:52:33 +0000 Received: from CY1PR0501MB1147.namprd05.prod.outlook.com ([10.160.144.153]) by CY1PR0501MB1147.namprd05.prod.outlook.com ([10.160.144.153]) with mapi id 15.01.0361.006; Thu, 7 Jan 2016 16:52:33 +0000 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Tuning Thread-Topic: [FlyRotary] Re: Tuning Thread-Index: AQHRSVC9SDlwpVvJRkSUXWPV/XMR6Z7wRPmp Date: Thu, 7 Jan 2016 16:52:33 +0000 Message-ID: <73B99854-75A6-4B89-B18B-796AC135ED94@uwyo.edu> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=SBoese@uwyo.edu; x-originating-ip: [69.146.103.188] x-microsoft-exchange-diagnostics: 1;CY1PR0501MB1146;5:Vl0d665yrtEy4W5EUBawEDWAuEZlpJd+OHEb50yPLmgQGDx/97CJhr4v8LoMJhZx+SiV36DIUAEJ0nstuWiX2tucasoPgTvZTto407yn2h9XOCPK+Mh3bV7SlS7GefWu+aoCsFCP+mm0kPgX7UafIg==;24:XqXAY23WAC99ijyPN3Azt9NXVfHuDsPnsBfCIX1ygzQxhMhLslVV5W5AxlJ7sq/m0VYo+psMnjzA9NNajXZoNr6zvwB5SLSxENRM6Ei019I= x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:CY1PR0501MB1146; x-ms-office365-filtering-correlation-id: 710841df-2018-4815-f708-08d31782f048 x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(601004)(2401047)(520078)(8121501046)(5005006)(3002001)(10201501046);SRVR:CY1PR0501MB1146;BCL:0;PCL:0;RULEID:;SRVR:CY1PR0501MB1146; x-forefront-prvs: 0814A2C7A3 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(377454003)(189002)(24454002)(51914003)(199003)(50986999)(450100001)(5004730100002)(76176999)(87936001)(77096005)(5001960100002)(16236675004)(83716003)(11100500001)(10400500002)(105586002)(102836003)(90282001)(122556002)(86362001)(81156007)(19580395003)(82746002)(19580405001)(106356001)(33656002)(97736004)(107886002)(790700001)(40100003)(101416001)(19625215002)(110136002)(88552001)(66066001)(189998001)(54356999)(6116002)(80792005)(1096002)(36756003)(1220700001)(75432002)(99286002)(2950100001)(586003)(106116001)(3846002)(89122001)(18717965001)(5008740100001)(2906002)(5002640100001)(92566002)(2900100001)(104396002);DIR:OUT;SFP:1102;SCL:1;SRVR:CY1PR0501MB1146;H:CY1PR0501MB1147.namprd05.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;MX:1;A:1;LANG:en; received-spf: None (protection.outlook.com: uwyo.edu does not designate permitted sender hosts) spamdiagnosticoutput: 1:23 spamdiagnosticmetadata: NSPM Content-Type: multipart/alternative; boundary="_000_73B9985475A64B89B18B796AC135ED94uwyoedu_" MIME-Version: 1.0 X-OriginatorOrg: uwyo.edu X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Jan 2016 16:52:33.0435 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: f9cdd7ad-825d-4601-8e9c-a325e02d52da X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR0501MB1146 --_000_73B9985475A64B89B18B796AC135ED94uwyoedu_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The reasoning for the suggested procedure is spelled out in the original ar= chived message. The issue was that the controller did not take injector de= ad time into account. It is possible that later versions incorporated a de= ad time correction but I have no way of knowing if they do. If that is the= case, then there may be no advantage to using the suggested procedure. I = proved this for myself by constructing modules placed between my EC2's and = the injectors which added the dead time to the injector pulses generated by= the controller. Steve Boese On Jan 7, 2016, at 6:38 AM, Jeff Whaley > wrote: The EC2 Manual clearly states: "Once you have the mixture correct at mid-po= wer setting (~24" Hg) with Mode 3, you're ready to set the low throttle mi= xture in Mode 2." The a-e steps from Steve B's email is his suggested simplified procedure, w= hich I believe many have used successfully. Your choice at this point. Jeff From: steve Izett [mailto:flyrotary@lancaironline.net] Sent: Thursday, January 07, 2016 5:56 AM Subject: Re: [FlyRotary] Re: Tuning Hi there Steve Thanks for the help. I am intrigued that c. directs to adjust the Mode #3 at a MAP below staging= . Tracy's notes say at approx 23". I thought mode #3 would be for above staging. I'll go back and re read. Steve On 7 Jan 2016, at 3:10 PM, Steven W. Boese > wrote: Steve, The following assumes that there are no problems with CAS or ignition: After setting the controller back to all default program values and dependi= ng on the update version of your controller, the following excerpt from arc= hive message #54156 of Mar 6, 2011 may be of interest: " The tuning procedure then becomes the same whether the primary and secondar= y injector flow rates are different or identical: a. Set the staging threshold at a MAP corresponding to the high end of the= primary injector flow limit using mode 7. (For 40 lb injectors, about 20"= MAP works well.) b. Adjust Mode 3 to get a mid scale O2 sensor reading at a MAP just below = the staging threshold MAP. c. Adjust mode 6 to get a mid scale O2 sensor reading at a MAP just above = the staging threshold MAP. d. Adjust mode 2 for best operation at minimum idle MAP. e. Adjust the mixture table throughout the useable MAP range using mode 1 = or 9 to keep the O2 sensor reading mid scale. (To be honest, I skip step "= e" and simply use the manual mixture control to adjust the mixture in cruis= e.) " Steve Boese RV6A 1986 13B NA RD1A EC2 --_000_73B9985475A64B89B18B796AC135ED94uwyoedu_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
The reasoning for the suggested procedure is spelled out in the origin= al archived message.  The issue was that the controller did not take i= njector dead time into account.  It is possible that later versions in= corporated a dead time correction but I have no way of knowing if they do.  If that is the case, then there may be= no advantage to using the suggested procedure.  I proved this for mys= elf by constructing modules placed between my EC2's and the injectors which= added the dead time to the injector pulses generated by the controller. 

Steve Boese

On Jan 7, 2016, at 6:38 AM, Jeff Whaley <flyrotary@lancaironline.net> wrote:

The EC2 Manual clearly states: “Once you have the mixture = correct at mid-power setting (~24” Hg) with Mode 3,  you’r= e ready to set the low throttle mixture in Mode 2.”

The a-e steps from Steve B’s email is his suggested simplified= procedure, which I believe many have used successfully.<= /p>

Your choice at this point.

Jeff

 <= /p>

 <= /p>

From: steve Iz= ett [mailto:flyrotary@lancai= ronline.net]
Sent: Thursday, January 07, 2016 5:56 AM
Subject: Re: [FlyRotary] Re: Tuning

 

Hi there Steve

Thanks for the help.

I am intrigued that c. directs to adjust the Mode #3= at a MAP below staging.

Tracy’s notes say at approx 23”.

I thought mode #3 would be for above staging.

 

I’ll go back and re read.

 

Steve

 

 

On 7 Jan 2016, at 3:10 PM, Steven W. Boese <flyrotary@lancaironline.net&g= t; wrote:

 

Steve,

 

The following assumes that there are no problems= with CAS or ignition:

After setting the controller back to all default= program values and depending on the update version of your controller, the= following excerpt from archive message #54156 of Mar 6, 2011 may be of interest:

"

The tuning procedure then becomes the same wheth= er the primary and secondary injector flow rates are different or identical= :

a.  Set the staging threshold at a MAP corresponding to the high end o= f the primary injector flow limit using mode 7.  (For 40 lb injectors,= about 20" MAP works well.)

b.  Adjust Mode 3 to get a mid scale O2 sensor reading at a MAP just b= elow the staging threshold MAP.

c.  Adjust mode 6 to get a mid scale O2 sensor reading at a MAP just a= bove the staging threshold MAP.

d.  Adjust mode 2 for best operation at minimum idle MAP.

e.  Adjust the mixture table throughout the useable MAP range using mo= de 1 or 9 to keep the O2 sensor reading mid scale.  (To be honest, I s= kip step "e" and simply use the manual mixture control to adjust = the mixture in cruise.)
"

Steve Boese
RV6A 1986 13B NA RD1A EC2


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