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 6.0.1) with ESMTPS id 6028273 for flyrotary@lancaironline.net; Thu, 24 Jan 2013 17:46:59 -0500 Received-SPF: none receiver=logan.com; client-ip=129.72.10.31; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht4.uwyo.edu (extlb.uwyo.edu [172.26.4.4]) by willowsprings.uwyo.edu (8.14.4/8.14.4) with ESMTP id r0OMkO8v002977 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Thu, 24 Jan 2013 15:46:24 -0700 (MST) (envelope-from SBoese@uwyo.edu) Received: from ponyexpress-m10.uwyo.edu ([fe80::60dd:cb9e:6f71:3d48]) by ponyexpress-ht4.uwyo.edu ([fe80::8de7:b225:a85b:d0ee%13]) with mapi id 14.02.0318.001; Thu, 24 Jan 2013 15:46:23 -0700 From: "Steven W. Boese" To: Rotary motors in aircraft Subject: RE: [FlyRotary] Hiccup! Thread-Topic: [FlyRotary] Hiccup! Thread-Index: AQHN+n+mLbTYPP29PU26oWBCQzMeQZhZDouX Date: Thu, 24 Jan 2013 22:46:23 +0000 Message-ID: <3E8191F276108F4481AB0721BBA9269E05F61730@ponyexpress-m10.uwyo.edu> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [75.220.155.142] Content-Type: multipart/alternative; boundary="_000_3E8191F276108F4481AB0721BBA9269E05F61730ponyexpressm10u_" MIME-Version: 1.0 --_000_3E8191F276108F4481AB0721BBA9269E05F61730ponyexpressm10u_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Bill, If you think the problem is with the EC2 signals, an example of examining t= hose signals is shown in the following web site: www.rotarycopilot.com/ in the Start Up Sequence discussion in the Documents section. Although thi= s discussion dealt with an issue that has since been resolved, the data col= lection and examination methodology may be helpful for your situation. Usi= ng 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 happe= n very often. It may also be worthwhile to consider setting up the monitoring system desc= ribed in the Software section of the same website. This system was develop= ed to troubleshoot my EC2 installation and enables one to verify the operat= ion 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 th= e 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 mi= sses a string of 3-4 in a row and loud backfires! It seems that it is elec= trical in nature as the mixture was pretty well centered the whole time and= turning the mixture knob didn=92t 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=92t there used to be someone on the list that built wire harnesses for= the EC-2? Suggestions welcomed! Bill B --_000_3E8191F276108F4481AB0721BBA9269E05F61730ponyexpressm10u_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

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. Alth= ough this discussion dealt with an issue that has since been resolved, the = data collection and examination methodology may be helpful for your situati= on. 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 d= escribed 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 s= older joint on one of the pins of the mixture control potentiometer of the = control board resulting in an intermittent connection. Watching the&n= bsp;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]<= br> 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 th= e whole time and turning the mixture knob didn=92t seem to help.

&= nbsp;

I am thinking a= bout rewiring the entire system, but I am somewhat concerned that I may jus= t screw up something that is not broken.

&= nbsp;

Didn=92t there = used to be someone on the list that built wire harnesses for the EC-2?

&= nbsp;

Suggestions wel= comed!

&= nbsp;

Bill B

&= nbsp;

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