X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124] verified) by logan.com (CommuniGate Pro SMTP 5.3.11) with ESMTP id 4665111 for flyrotary@lancaironline.net; Wed, 05 Jan 2011 15:33:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.124; envelope-from=clouduster@austin.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=dquaJDitHqzHCdqWSoZ6IgapSuTzW/4TaRYx9N9k4W8= c=1 sm=0 a=svIKFco9tjcA:10 a=04I7FWNrTfP4RHm++yk/MQ==:17 a=Ia-xEzejAAAA:8 a=fkCJMmmTxCbgZHlIFFMA:9 a=XNDZR0mnFBtsvp8Ty-fD2Ig_GQQA:4 a=wPNLvfGTeEIA:10 a=EzXvWhQp4_cA:10 a=SSmOFEACAAAA:8 a=yMhMjlubAAAA:8 a=57-88_lVqxKWMDHSl7kA:9 a=wUAZLThNL1Pl32By42QA:7 a=5onmymcmDPaytiPQ4a6GgZN5DtYA:4 a=04I7FWNrTfP4RHm++yk/MQ==:117 X-Cloudmark-Score: 0 X-Originating-IP: 70.113.14.52 Received: from [70.113.14.52] ([70.113.14.52:55642] helo=DWHPC) by hrndva-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id E7/5E-14011-B75D42D4; Wed, 05 Jan 2011 20:33:00 +0000 Message-ID: <82D7CF23D36549CAAFDFC61561EE99C5@DWHPC> From: "Dennis Havarlah" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: GM Coil Comparison Date: Wed, 5 Jan 2011 14:32:55 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_030F_01CBACE5.715671D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18263 This is a multi-part message in MIME format. ------=_NextPart_000_030F_01CBACE5.715671D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Steve On run-up I get about 50 rpm change from both to leading or trailing. I = normally do the check at about 3200 rpm. =20 Now that you mention it, I would guess that the occasional misfire is = "probably" a total misfire of one rotor face. Don't really know though! = =20 Do you ever have a similar event? Dennis H. ----- Original Message -----=20 From: Steven W. Boese=20 To: Rotary motors in aircraft=20 Sent: Wednesday, January 05, 2011 11:14 AM Subject: [FlyRotary] Re: GM Coil Comparison Dennis, =20 When you check the coils with the coil disable function on runup, is = there enough of a change that you would expect to notice one plug = intermittently not firing in cruise? =20 Steve Boese =20 =20 =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Dennis Havarlah Sent: Wednesday, January 05, 2011 10:00 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: GM Coil Comparison =20 Mark - You are not alone with your occasional intermittent misfire. I = also have the miss as you described - I only notice it in cruise. It = happens once every 15 to 30 minutes! I wonder if it is one plug not = firing instead of a complete miss of the cylinder. I'm using the = Renesis RX-8 coils and RX-8 Iridium plugs with Tracy's EC-2. Most of = the time I use mogas. =20 =20 Dennis H. ------=_NextPart_000_030F_01CBACE5.715671D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Steve
 
On run-up I get about 50 rpm change = from both to=20 leading or trailing.  I normally do the check at about 3200 = rpm. =20
 
Now that you mention it, I would guess = that the=20 occasional misfire is "probably" a total misfire of one rotor = face.  Don't=20 really know though! 
 
Do you ever have a similar = event?
 
Dennis H.
----- Original Message -----
From:=20 Steven W. = Boese=20
Sent: Wednesday, January 05, = 2011 11:14=20 AM
Subject: [FlyRotary] Re: GM = Coil=20 Comparison

Dennis,

 

When=20 you check the coils with the coil disable function on runup, is there = enough=20 of a change that you would expect to notice one plug intermittently = not firing=20 in cruise?

 

Steve=20 Boese

 

 

 

From: Rotary = motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of = Dennis=20 Havarlah
Sent: Wednesday, January 05, 2011 10:00 = AM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Re: GM Coil=20 Comparison

 

Mark - = You are not=20 alone with your occasional intermittent misfire.  I also have the = miss as=20 you described - I only notice it in cruise.  It happens once = every 15 to=20 30 minutes!  I wonder if it is one plug not firing instead of a = complete=20 miss of the cylinder.   I'm using the Renesis RX-8 coils and = RX-8 Iridium plugs with Tracy's EC-2.  Most of the time I = use=20 mogas. 

 

Dennis=20 H.

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