X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost04.isp.att.net ([207.115.11.54] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 6028358 for flyrotary@lancaironline.net; Thu, 24 Jan 2013 18:39:27 -0500 Received-SPF: none receiver=logan.com; client-ip=207.115.11.54; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-189-34.mco.bellsouth.net[98.85.189.34]) by isp.att.net (frfwmhc04) with SMTP id <20130124233852H0400ap1d3e>; Thu, 24 Jan 2013 23:38:52 +0000 X-Originating-IP: [98.85.189.34] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Hiccup! Date: Thu, 24 Jan 2013 18:38:54 -0500 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01CDFA62.109B88E0" X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 Thread-Index: Ac36hLthQs/wqzMBRJSpMVQTItdaWQABjm1A This is a multi-part message in MIME format. ------=_NextPart_000_0012_01CDFA62.109B88E0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Steve, I am a pretty well defined dork when it comes to herding electrons, but pins 16, 7, & 27 appear to be the ground, in and out for the serial connection to the EM-2. So to make the connection to the computer cable, I could tap these three wires and connect them to the indicated computer cable wires and it would work? It appears that the green and brown wires may be connected together as well? I can get the computer cable where? Radio Shack? Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Steven W. Boese Sent: Thursday, January 24, 2013 5:46 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Hiccup! Bill, If you think the problem is with the EC2 signals, an example of examining those signals is shown in the following web site: www.rotarycopilot.com/ in the Start Up Sequence discussion in the Documents section. Although this discussion dealt with an issue that has since been resolved, the data collection and examination methodology may be helpful for your situation. Using this would depend on being able to collect data during the time that the problem occurred which might take some effort if the problem doesn't happen very often. It may also be worthwhile to consider setting up the monitoring system described in the Software section of the same website. This system was developed to troubleshoot my EC2 installation and enables one to verify the operation of the EC2 controls (among other things). In my case, there was a cold solder joint on one of the pins of the mixture control potentiometer of the control board resulting in an intermittent connection. Watching the EC2 output as the mixture control setting was changed made the problem obvious. The engine didn't even need to be running to find the problem. Let me know if you want more details. Steve Boese RV6A, 1986 13B NA, RD1A, EC2 _____ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Bill Bradburry [bbradburry@bellsouth.net] Sent: Thursday, January 24, 2013 3:09 PM To: Rotary motors in aircraft Subject: [FlyRotary] Hiccup! Well the hiccup is much worse now! In fact it is no longer a hiccup. I misses a string of 3-4 in a row and loud backfires! It seems that it is electrical in nature as the mixture was pretty well centered the whole time and turning the mixture knob didn't seem to help. I am thinking about rewiring the entire system, but I am somewhat concerned that I may just screw up something that is not broken. Didn't there used to be someone on the list that built wire harnesses for the EC-2? Suggestions welcomed! Bill B ------=_NextPart_000_0012_01CDFA62.109B88E0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Steve,

 

I am a pretty well defined dork = when it comes to herding electrons, but pins 16, 7, & 27 appear to be the = ground, in and out for the serial connection to the EM-2.  So to make the = connection to the computer cable, I could tap these three wires and connect them to = the indicated computer cable wires and it would work?  It appears that = the green and brown wires may be connected together as = well?

I can get the computer cable = where?  Radio Shack?

 

Bill B

 

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Steven W. Boese
Sent: Thursday, January = 24, 2013 5:46 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Hiccup!

 

Bill,

 

If you think the problem is with = the EC2 signals, an example of examining those signals is shown in the following = web site:

www.rotarycopilot.com/

in the Start Up Sequence discussion in = the Documents section.  Although this discussion dealt with an issue = that has since been resolved, the data collection and examination methodology may = be helpful for your situation.  Using this would depend on being able = to collect data during the time that the problem occurred which might = take some effort if the problem doesn't happen very = often.

 

It may also be worthwhile to consider = setting up the monitoring system described in the Software section of the same = website.  This system was developed to troubleshoot my EC2 installation and = enables one to verify the operation of the EC2 controls (among other things).  In my case, there was a cold solder joint on one of the = pins of the mixture control potentiometer of the control board resulting in an intermittent connection.  Watching the EC2 output as = the mixture control setting was changed made the problem obvious.  The engine = didn't even need to be running to find the = problem.

 

Let me know if you want more details. 

 

Steve = Boese

RV6A, 1986 13B NA, RD1A, = EC2

 

 

From: = Rotary motors in aircraft [flyrotary@lancaironline.net] on = behalf of Bill Bradburry = [bbradburry@bellsouth.net]
Sent: Thursday, January = 24, 2013 3:09 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] = Hiccup!

Well the hiccup is much worse = now!  In fact it is no longer a hiccup.  I misses a string of 3-4 in a = row and loud backfires!  It seems that it is electrical in nature as the = mixture was pretty well centered the whole time and turning the mixture knob didn’t seem to help.

 

I am thinking about rewiring the = entire system, but I am somewhat concerned that I may just screw up something = that is not broken.

 

Didn’t there used to be = someone on the list that built wire harnesses for the EC-2?

 

Suggestions = welcomed!

 

Bill B

 

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