X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from bay0-omc1-s18.bay0.hotmail.com ([65.54.246.90] verified) by logan.com (CommuniGate Pro SMTP 5.1c.5) with ESMTP id 1441039 for flyrotary@lancaironline.net; Wed, 04 Oct 2006 10:31:51 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.90; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.82]) by bay0-omc1-s18.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830); Wed, 4 Oct 2006 07:31:30 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 4 Oct 2006 07:31:29 -0700 Message-ID: Received: from 4.171.129.190 by BAY115-DAV10.phx.gbl with DAV; Wed, 04 Oct 2006 14:31:24 +0000 X-Originating-IP: [4.171.129.190] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Latest EC2 updates, Installation notes Date: Wed, 4 Oct 2006 10:31:19 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C6E7A0.3B226010" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 Seal-Send-Time: Wed, 4 Oct 2006 10:31:19 -0400 X-MimeOLE: Produced By MSN MimeOLE V9.20.0029.3000 X-OriginalArrivalTime: 04 Oct 2006 14:31:29.0748 (UTC) FILETIME=[C80A9940:01C6E7C1] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C6E7A0.3B226010 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable While trouble shooting Al Gietzen's EC2 engine controller problems, he = mentioned that he was seeing relatively large mixture changes when the = alternator was switched off and the battery voltage went low. The = mixture goes leaner with lower battery voltage because the injectors = take longer to open. It was well within the range of the manual mixture = control to correct but it got me to thinking about adding battery = voltage compensation to the EC2. This has been done and all controllers = shipped after 9-20-06 now incorporate this feature. Not a freebie, but = if anyone wants this incorporated into an earlier EC2 it can be = retrofitted. The other update is a rev limiter. It was easy to do so I went ahead and = added it. I haven't seen this as a priority because in our application = if you make use of it, it means that you need to be more concerned about = the pilot's health than the engine's (the prop has fallen off the = airplane). The default rev limit is 8000 rpm. If you want something = different, specify when ordering. (Also retrofittable) EC2 / EM2 Installation Note. This only applies to EC2 engine controller installations combined with = early two-part EM2 engine monitors in canard aircraft where both units = are installed near the engine and have long wiring harnesses connecting = them to the EC2 front panel and EM2 display (a rare combination that may = be unique to Al's airplane). Have been working with Al for some time = searching for the cause of random MAP table and other EC2 parameter = corruption. I am now almost certain that the cause is noise coupling = from the EM2 display harness into the EC2 control panel harness. The = two harnesses were laced together in Al's installation. He is in the = process of separating them now (sympathies to Al, no picnic). Needless = to say at this point, never run these two harnesses together and = separate them as far as practical. I think Al will have about 4 inches = between them when separated. Tracy Crook, RWS ------=_NextPart_000_0007_01C6E7A0.3B226010 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
While trouble shooting Al Gietzen's EC2 engine controller problems, = he=20 mentioned that he was seeing relatively large mixture changes  when = the=20 alternator was switched off and the battery voltage went low.  The = mixture=20 goes leaner with lower battery voltage because the injectors take = longer to=20 open.  It was well within the range of the manual mixture = control to=20 correct but it got me to thinking about adding battery = voltage compensation=20 to the EC2.  This has been done and all controllers shipped after = 9-20-06=20 now incorporate this feature.  Not a freebie, but if anyone wants = this=20 incorporated into an earlier EC2 it can be retrofitted.
 
The other update is a rev limiter. It was easy to do so I went = ahead=20 and added it. I haven't seen this as a priority because in our = application if=20 you make use of it, it means that you need to be more concerned about = the=20 pilot's health than the engine's (the prop has fallen off the = airplane). =20 The default rev limit is 8000 rpm.   If you want something = different,=20 specify when ordering.    (Also retrofittable)
 
EC2 / EM2 Installation Note.
 
This only applies to EC2 engine controller installations combined = with=20 early two-part EM2 engine monitors in canard aircraft where both units = are=20 installed near the engine and have long wiring harnesses connecting them = to the=20 EC2 front panel and EM2 display (a rare combination that may be unique = to Al's=20 airplane).   Have been working with Al for some time searching = for the=20 cause of random MAP table and other EC2 parameter corruption.  I am = now=20 almost certain that the cause is noise coupling from the EM2 display = harness=20 into the EC2 control panel harness.  The two harnesses were = laced=20 together in Al's installation.   He is in the process of = separating=20 them now (sympathies to Al, no picnic).   Needless to say at = this=20 point,  never run these two harnesses together and separate them as = far as=20 practical.   I think Al will have about 4 inches between them = when=20 separated.
 
Tracy Crook,   RWS
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