X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtprh02.spirittelecom.com ([165.166.0.78] verified) by logan.com (CommuniGate Pro SMTP 5.1c.5) with ESMTPS id 1449701 for flyrotary@lancaironline.net; Sun, 08 Oct 2006 15:11:47 -0400 Received-SPF: pass receiver=logan.com; client-ip=165.166.0.78; envelope-from=jewen@comporium.net X-Report-Abuse-To: abuse@spirittelecom.com X-DKIM: Sendmail DKIM Filter v0.5.2 smtprh02.spirittelecom.com k98JBB7B008061 DKIM-Signature: a=rsa-sha1; c=relaxed/simple; d=comporium.net; s=spiritmail; t=1160334672; bh=vWdIQxWQsZLV/SpE8FaNh2EzcEs=; h=Message-ID:From:To: References:Subject:Date:MIME-Version:Content-Type:X-Priority: X-MSMail-Priority:X-Mailer:X-MIMEOLE:X-Virus-Scanned: X-Virus-Status; b=D7okBG9AXp6WCpaSYI0o3ebFg51vx8oo/Z3p9GO3k9GwyzTVc 564vFuL8MrDUel0wQdCCv97lG4/TxDgvDSLbQ== Received: from Engineer1 (208-104-88-189.lnhe.2wcm.comporium.net [208.104.88.189] (may be forged)) by smtprh02.spirittelecom.com (8.13.6/8.13.1) with SMTP id k98JBB7B008061 for ; Sun, 8 Oct 2006 19:11:12 GMT Message-ID: <003701c6eb0d$8abd45c0$6505a8c0@cooleygroup.local> From: "Joe Ewen" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Latest EC2 updates, Installation notes Date: Sun, 8 Oct 2006 15:11:21 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0034_01C6EAEC.03726D50" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Virus-Scanned: ClamAV 0.88/2011/Sun Oct 8 18:07:55 2006 on smtprh02.spirittelecom.com X-Virus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0034_01C6EAEC.03726D50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I second Al opinion on not using soldered Dsub connectors. In my = opinion crimped Dsub connectors are more professional and potentially = reliable. Soldered connections are more prone to corrosion, cold solder = joints, crystallizing and breakage from vibration. I am not saying I do = not have any solder joints in my airplane, but there are none anywhere = in the engine controller circuit. If you are looking for a source for = milled pins - Steinair.com, $25 /c for pins and sockets. Crimped = (milled) pins and sockets are much easier and IMO result in a more = professional installation. Joe ----- Original Message -----=20 From: Al Gietzen=20 To: Rotary motors in aircraft=20 Sent: Sunday, October 08, 2006 10:31 AM Subject: [FlyRotary] Re: Latest EC2 updates, Installation notes Wendell; If I were doing it over, I'd use twisted conductor, shielded cable = (ground shield at box). I don't know that it is needed, but it can help = eliminate capacitance coupling and RF interference. Inductive = (magnetic) coupling could still occur, so if you can separate them by = 2-3 inches it would be good. Electrical noise is a bit of a guessing = game, so take this as one of the guesses. Another opinion: I'd also replace all the solder socket plugs with the = machined, plated, crimp D-sub connectors. It's faster, easier, more = consistent, eliminates the potential of flux induced corrosion, and = gives you removable pins. I did a careful soldering job, but used Radio = Shack flux core solder; and on careful examination of connectors done a = few years ago there are signs of corrosion. For thermocouple connections = directly to the d-sub, it is necessary; thermocouple leads do not = 'solder' unless you use silver solder; which you really can't do on the = d-sub plug without melting the plastic carrier. Just my opinions. Al (still fighting noise issues and a bad thermocouple connection) -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Wendell Voto Sent: Saturday, October 07, 2006 8:08 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Latest EC2 updates, Installation notes 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_0034_01C6EAEC.03726D50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I second Al opinion on not using = soldered Dsub=20 connectors.  In my opinion crimped Dsub connectors are more = professional=20 and potentially reliable.  Soldered connections are more prone to=20 corrosion, cold solder joints, crystallizing and breakage from = vibration. =20 I am not saying I do not have any solder joints in my airplane, but = there are=20 none anywhere in the engine controller circuit.  If you are looking = for a=20 source for milled pins - Steinair.com, $25 /c for pins and = sockets. =20 Crimped (milled) pins and sockets are much easier and IMO result in a = more=20 professional installation.
Joe
----- Original Message -----
From:=20 Al = Gietzen=20
Sent: Sunday, October 08, 2006 = 10:31=20 AM
Subject: [FlyRotary] Re: Latest = EC2=20 updates, Installation notes

Wendell;

 

If I were = doing it=20 over, I=92d use twisted conductor, shielded cable (ground shield at = box).=20  I don=92t know that it is needed, but it can help eliminate = capacitance=20 coupling and RF interference.  Inductive (magnetic) coupling = could still=20 occur, so if you can separate them by 2-3 inches it would be = good. =20 Electrical noise is a bit of a guessing game, so take this as one of = the=20 guesses.

 

Another = opinion:=20 I=92d also replace all the solder socket plugs with the machined, = plated, crimp=20 D-sub connectors.  It=92s faster, easier, more consistent, = eliminates the=20 potential of flux induced corrosion, and gives you removable pins. I = did a=20 careful soldering job, but used Radio Shack flux core solder; and on = careful=20 examination of connectors done a few years ago there are signs of = corrosion.=20 For thermocouple connections directly to the d-sub, it is necessary;=20 thermocouple leads do not =91solder=92 unless you use silver solder; = which you=20 really can=92t do on the d-sub plug without melting the plastic=20 carrier.

 

Just my=20 opinions.

 

Al (still = fighting=20 noise issues and a bad thermocouple connection)

 

-----Original=20 Message-----
From: = Rotary=20 motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Wendell = Voto
Sent: Saturday, October 07, = 2006 8:08=20 PM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 Re: Latest EC2 updates, Installation notes

 

Tracy,

Would shielded=20 cables be okay to run close together in a fiberglass=20 aircraft?

Thanks,

Wendell

-----=20 Original Message -----

From: Tracy = Crook=20

To: Rotary motors in = aircraft=20

Sent: = Wednesday,=20 October 04, 2006 9:31 AM

Subject: = [FlyRotary] Re:=20 Latest EC2 updates, Installation notes

 

While=20 trouble shooting Al Gietzen's EC2 engine controller problems, he = mentioned=20 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=20 injectors take longer to open.  It was well within = the range=20 of the manual mixture control to correct but it got me to thinking = about=20 adding battery voltage compensation to the EC2.  This has = been=20 done and all controllers shipped after 9-20-06 now incorporate this=20 feature.  Not a freebie, but if anyone wants this incorporated = into an=20 earlier EC2 it can be retrofitted.

 

The=20 other update is a rev limiter. It was easy to do so I went = ahead and=20 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=20 airplane).  The default rev limit is 8000 rpm.   If = you want=20 something different, specify when ordering.    (Also=20 retrofittable)

 

EC2 /=20 EM2 Installation Note.

 

This=20 only applies to EC2 engine controller installations combined with = early=20 two-part EM2 engine monitors in canard aircraft where both units are = 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=20 to Al's airplane).   Have been working with Al for some = time=20 searching for the cause of random MAP table and other EC2 parameter=20 corruption.  I am now almost certain that the cause is noise = coupling=20 from the EM2 display harness into the EC2 control panel = harness.  The=20 two harnesses were laced together in Al's = installation.   He=20 is in the process of separating them now (sympathies to Al, no=20 picnic).   Needless to say at this point,  never run = these=20 two harnesses together and separate them as far as = practical.   I=20 think Al will have about 4 inches between them when=20 separated.

 

Tracy=20 Crook,  =20 RWS

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