X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2331755 for flyrotary@lancaironline.net; Fri, 14 Sep 2007 21:16:55 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.131.115; envelope-from=keltro@att.net Received: from mwebmail25.att.net ([204.127.135.64]) by worldnet.att.net (mtiwmhc11) with SMTP id <2007091501160811100pvsdue>; Sat, 15 Sep 2007 01:16:18 +0000 Received: from [4.245.50.235] by mwebmail25.att.net; Sat, 15 Sep 2007 01:16:07 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] One for the smart guys Date: Sat, 15 Sep 2007 01:16:07 +0000 Message-Id: <091520070116.11948.46EB3257000329E600002EAC2160280741019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Mar 24 2007) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_11948_1189818967_0" --NextPart_Webmail_9m3u9jl4l_11948_1189818967_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Sparkplugs........(dreaded "SAG") -- Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold -------------- Original message from "Mark Steitle" : -------------- 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. --NextPart_Webmail_9m3u9jl4l_11948_1189818967_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Sparkplugs........(dreaded "SAG")

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

-------------- Original message from "Mark Steitle" <msteitle@gmail.com>: --------------

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.

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