X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from willowsprings.uwyo.edu ([129.72.10.31] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTPS id 3741005 for flyrotary@lancaironline.net; Wed, 01 Jul 2009 00:40:28 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.31; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht2.uwyo.edu (ponyexpress-ht2.uwyo.edu [10.84.60.209]) by willowsprings.uwyo.edu (8.14.2/8.14.2) with ESMTP id n614djBB021102 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Tue, 30 Jun 2009 22:39:45 -0600 (MDT) (envelope-from SBoese@uwyo.edu) Received: from sboesetablet (172.26.4.5) by uwmail.uwyo.edu (10.84.60.199) with Microsoft SMTP Server id 8.1.375.2; Tue, 30 Jun 2009 22:39:41 -0600 From: Steven Boese To: "'Rotary motors in aircraft'" In-Reply-To: Subject: RE: [FlyRotary] frustrating couple of days Date: Tue, 30 Jun 2009 22:39:32 -0600 Message-ID: <62BE47E136574D5BB5789A580AA77AC8@sboesetablet> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C9F9D3.A397CCA0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 ------=_NextPart_000_0011_01C9F9D3.A397CCA0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Mike, I have developed a system where it is possible to observe and record once per second about 20 parameters that the EC2 is using. It has proven useful to me to understand the workings of the EC2 and may be useful in diagnosing what is happening with your system. It requires either a laptop with a serial interface or a USB to serial adapter, or an IPAQ with a serial interface. A voltage level converter which converts the 5 V EC2 signals to RS232 levels and costs about $20 is also required. If the EC2 is accessible and a 1-inch long connector can be inserted between the EC2 and the existing connector, no wiring changes are required. If you are interested in trying this system, let me know, and I'll send you a CD with the software and instructions. Steve Boese -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills Sent: Tuesday, June 30, 2009 10:10 PM To: Rotary motors in aircraft Subject: [FlyRotary] frustrating couple of days I havent flown my RV since a couple of cases of lost data in the EC2 back in february. Spent the last few months making a bunch of mods, some suggested by Tracy, others were things that I thought might increase long term reliability. Also had to fix leaking fuel tanks in the ensuing period. Been working up toward renewing flight testing. Engine has been running really well for the last few months. Thought that the problem was cured, though not clear how. Then on saturday found that once again my B controller had lost all data. Engine wouldnt run at any throttle setting on B. Restored the B controller by copying A > B. Last night after work ground ran the engine for about 30 minutes at various throttle settings and it ran as good as always. Also ran fine on the B controller. Tonight after work I fired it up. Ran fine initially. After about 15 minutes noted some minor surging at a couple of throttle settings below 2000 RPM. Also noticed that in this RPM range where the mixture had previously been fine, my mixture monitor is off the scale lean. Slowly got worse, to the point that it wouldnt idle at what was previously a solid 1350RPM. Couldnt get it to run at all below 1500, everything between 1500 and about 3000 RPM pretty rough. Everything over 3000 is fine. No idea what caused this change. I put the airplane away and walked away in disgust. I'm back to where I was a year ago and I'm just about fed up with this thing. Mike Wills RV-4 N144MW ------=_NextPart_000_0011_01C9F9D3.A397CCA0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Mike,

 

I have developed a system where it = is possible to observe and record once per second about 20 parameters that = the EC2 is using.  It has proven = useful to me to understand the workings of the EC2 and may be useful in diagnosing = what is happening with your system.  = It requires either a laptop with a serial interface or a USB to serial = adapter, or an IPAQ with a serial interface.  = A voltage level converter which converts the 5 V EC2 signals to RS232 = levels and costs about $20 is also required.  = If the EC2 is accessible and a 1-inch long connector can be inserted between = the EC2 and the existing connector, no wiring changes are required.  If you are interested in trying = this system, let me know, and I’ll send you a CD with the software and instructions.  =

 

Steve Boese

  

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills
Sent: Tuesday, June 30, = 2009 10:10 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = frustrating couple of days

 

I havent flown my RV since = a couple of cases of lost data in the EC2 back in february. Spent the last few = months making a bunch of mods, some suggested by Tracy, others were things that = I thought might increase long term reliability. Also had to fix leaking = fuel tanks in the ensuing period.

 

Been working up toward = renewing flight testing. Engine has been running really well for the last few = months. Thought that the problem was cured, though not clear how. Then on = saturday found that once again my B controller had lost all data. Engine wouldnt = run at any throttle setting on B. Restored the B controller by copying A > = B.

 

Last night after work = ground ran the engine for about 30 minutes at various throttle settings and it ran as = good as always. Also ran fine on the B controller.

 

Tonight after work I fired = it up. Ran fine initially. After about 15 minutes noted some minor surging at a = couple of throttle settings below 2000 RPM. Also noticed that in this RPM range = where the mixture had previously been fine, my mixture monitor is off the = scale lean. Slowly got worse, to the point that it wouldnt idle at what = was previously a solid 1350RPM. Couldnt get it to run at all below 1500, = everything between 1500 and about 3000 RPM pretty rough. Everything over 3000 is = fine. No idea what caused this change. I put the airplane away and walked away in disgust. I'm back to where I was a year ago and I'm just about fed up = with this thing.

 

Mike = Wills

RV-4 = N144MW

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