X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from email2k4.itlnet.net ([64.19.112.14] verified) by logan.com (CommuniGate Pro SMTP 5.1c.5) with ESMTP id 1448858 for flyrotary@lancaironline.net; Sat, 07 Oct 2006 23:53:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.19.112.14; envelope-from=jwvoto@itlnet.net Received: from rav.itlnet.net (unverified [192.168.10.149]) by email2k4.itlnet.net (Rockliffe SMTPRA 7.0.3) with SMTP id for ; Sat, 7 Oct 2006 22:53:22 -0500 Received: from JWVOTO (unverified [64.19.116.60]) by mail.itlnet.net (Rockliffe SMTPRA 7.0.3) with ESMTP id for ; Sat, 7 Oct 2006 22:53:20 -0500 Message-ID: <003101c6ea8f$63febe60$3c741340@JWVOTO> From: "Wendell Voto" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Latest EC2 updates, Installation notes Date: Sat, 7 Oct 2006 23:07:35 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002C_01C6EA65.603636C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 This is a multi-part message in MIME format. ------=_NextPart_000_002C_01C6EA65.603636C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Tracy, Would shielded cables be okay to run close together in a fiberglass = aircraft? Thanks, Wendell ----- Original Message -----=20 From: Tracy Crook=20 To: Rotary motors in aircraft=20 Sent: Wednesday, October 04, 2006 9:31 AM Subject: [FlyRotary] Re: Latest EC2 updates, Installation notes 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_002C_01C6EA65.603636C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Tracy,
Would shielded cables be = okay to run=20 close together in a fiberglass aircraft?
Thanks,
Wendell
----- Original Message -----
From:=20 Tracy = Crook
Sent: Wednesday, October 04, = 2006 9:31=20 AM
Subject: [FlyRotary] Re: Latest = EC2=20 updates, Installation notes

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=20 mixture goes leaner with lower battery voltage because the = injectors take=20 longer to open.  It was well within the range of the manual = mixture=20 control to correct but it got me to thinking about adding battery=20 voltage compensation to the EC2.  This has been done and all = controllers shipped after 9-20-06 now incorporate this feature.  = Not a=20 freebie, but if anyone wants this incorporated into an earlier EC2 it = can be=20 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=20 different, 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=20 the EC2 front panel and EM2 display (a rare combination that may be = unique to=20 Al's airplane).   Have been working with Al for some time = searching=20 for the cause of random MAP table and other EC2 parameter = corruption.  I=20 am now almost certain that the cause is noise coupling from the EM2 = display=20 harness into the EC2 control panel harness.  The two = harnesses were=20 laced together in Al's installation.   He is in the process = of=20 separating them now (sympathies to Al, no picnic).   = Needless to say=20 at this point,  never run these two harnesses together and = separate them=20 as far as practical.   I think Al will have about 4 inches = between=20 them when separated.
 
Tracy Crook,   = RWS
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