X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wx-out-0506.google.com ([66.249.82.233] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2331710 for flyrotary@lancaironline.net; Fri, 14 Sep 2007 21:15:00 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.249.82.233; envelope-from=msteitle@gmail.com Received: by wx-out-0506.google.com with SMTP id i27so881186wxd for ; Fri, 14 Sep 2007 18:14:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; bh=zv6O2MhhoOgyau+kwPySAVBiQA6iFN43XxMAiXk72LQ=; b=T7gU/3i/uxFjZkGW58KPDG3BgXMrWnS3ZxwAeuMt00qAu5X/NY5XEGsoKcOoK8XnqS6oN3JzEsZpqLtRSo1tyuukC4WtCmbsDIs9UegQtioVbQANKsyjzL+K34YlAuj3dvJy0Ihj2/LRS/OQu7h2NDrO2bgSFZiUSO2+DuVgrnY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=IOTlGQAUlNWItULrCYGtqanOZhLT4qLuaI0/oYA88VWul8H1NUoYSK5qu6HmclzmI2RuhYZrWQKTJ2acSysCxqZy+5gJBthrYb+NEoscMu4Ip2Kjj+C9hbtPMa+HnF/1iG7WmkKoMbN13/U8vhoXtBySYGNcuJ0F5f1WvCFy8wg= Received: by 10.90.74.1 with SMTP id w1mr548384aga.1189818863977; Fri, 14 Sep 2007 18:14:23 -0700 (PDT) Received: by 10.90.35.16 with HTTP; Fri, 14 Sep 2007 18:14:23 -0700 (PDT) Message-ID: <5cf132c0709141814r779f563ch236abd858221d3ee@mail.gmail.com> Date: Fri, 14 Sep 2007 20:14:23 -0500 From: "Mark Steitle" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: One for the smart guys In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_3108_2311526.1189818863960" References: ------=_Part_3108_2311526.1189818863960 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline The Renesis CAS was brand new. Unlike the older style CAS, the Renesis CAS has only 2 wires (shielded). They go directly to the EC-2 via the D-sub connector. The shield is grounded to the EC-2 case. This was not the problem. In fact, the problem wasn't caused by wiring at all. Good guess though. Mark On 9/14/07, cbeazley wrote: > > > > > OK guys, here's one to think about. > > > > Problem: Major mis-fire at 6600 - 7000 rpm. Engine runs great up > > until it begins mis-firing. This is a 20B running an EC-2 that's been > > updated with the latest s/w (as of 9/1/07). This includes the snubber > > fix and a modification for the Renesis CAS. Before the snubber > > upgrade, the engine ran good in the upper rpm range, but not in the > > lower rpm range. After the snubber upgrade & Renesis CAS > > modification, it ran great in the lower rpm range, but had a > > serious mis-fire beginning around 3800 rpm. An attempt was made to > > correct the mis-firing problem by installing a resistor/zener diode > > circuit in the CAS lead (this strategy worked for another Renesis > > flyer). This approach was partially successful, but only up to the > > mid 6K range. > > > > Multiple phone calls to Tracy resulted in no fix. I think he's hiding > > in Colorado so he won't have to take my calls. (I'm kidding, of course.) > > > > Finally, today (after months of struggling) I discovered what was > > causing the problem. It now runs great up to 7300 rpm, verified by a > > full-power run down the runway. Anyone want to guess as to what the > > problem turned out to be? > > > > Mark S. > > CAS shielding/grounding? > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > ------=_Part_3108_2311526.1189818863960 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline
The Renesis CAS was brand new.  Unlike the older style CAS, the Renesis CAS has only 2 wires (shielded).  They go directly to the EC-2 via the D-sub connector.  The shield is grounded to the EC-2 case.  This was not the problem.  In fact, the problem wasn't caused by wiring at all.  Good guess though.   
 
Mark

 
On 9/14/07, cbeazley <cbeazley@innovista.net> wrote:
>
> OK guys, here's one to think about.
>
> Problem:  Major mis-fire at 6600 - 7000 rpm.  Engine runs great up
> until it begins mis-firing.  This is a 20B running an EC-2 that's been
> updated with the latest s/w (as of 9/1/07).  This includes the snubber
> fix and a modification for the Renesis CAS.  Before the snubber
> upgrade, the engine ran good in the upper rpm range, but not in the
> lower rpm range.  After the snubber upgrade & Renesis CAS
> modification, it ran great in the lower rpm range, but had a
> serious mis-fire beginning around 3800 rpm.  An attempt was made to
> correct the mis-firing problem by installing a resistor/zener diode
> circuit in the CAS lead (this strategy worked for another Renesis
> flyer).  This approach was partially successful, but only up to the
> mid 6K range.
>
> Multiple phone calls to Tracy resulted in no fix.  I think he's hiding
> in Colorado so he won't have to take my calls. (I'm kidding, of course.)
>
> Finally, today (after months of struggling) I discovered what was
> causing the problem.  It now runs great up to 7300 rpm, verified by a
> full-power run down the runway.  Anyone want to guess as to what the
> problem turned out to be?
>
> Mark S.

CAS shielding/grounding?

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html

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