X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from is1.mum.edu ([69.18.50.66] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTP id 2332761 for flyrotary@lancaironline.net; Sat, 15 Sep 2007 12:58:25 -0400 Received-SPF: none receiver=logan.com; client-ip=69.18.50.66; envelope-from=rob@mum.edu Received: from personnel10 ([10.10.0.196]) by is1.mum.edu (8.13.3+Sun/8.13.3) with SMTP id l8FGvkg0025241 for ; Sat, 15 Sep 2007 11:57:46 -0500 (CDT) Message-ID: <006001c7f7ba$3df320b0$c4000a0a@personnel10> Reply-To: "Rob" From: "Rob" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] One for the smart guys Date: Sat, 15 Sep 2007 12:02:47 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005D_01C7F790.54CA8BE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_005D_01C7F790.54CA8BE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable BTW Mark, what is the advantage of adding the Renesis CAS to the 20B = over the older RX7 type sensor that comes with the engine? Robert Robert Bollinger FM1099 MUM Fairfield IA 52557 (641)472-7000 ex2068 (641)919-3213 cell rob@mum.edu ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Friday, September 14, 2007 6:54 PM Subject: [FlyRotary] One for the smart guys OK guys, here's one to think about. =20 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. =20 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.) = =20 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? =20 Mark S. ------=_NextPart_000_005D_01C7F790.54CA8BE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
BTW Mark, what is the advantage of = adding the=20 Renesis CAS to the 20B over the older RX7 type sensor that comes with = the=20 engine?
Robert
 
Robert Bollinger
FM1099 = MUM
Fairfield IA=20 52557
(641)472-7000 ex2068
(641)919-3213 cell
rob@mum.edu
----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Friday, September 14, = 2007 6:54=20 PM
Subject: [FlyRotary] One for = the smart=20 guys

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