X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.248] (HELO qnsi-xch.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2096437 for flyrotary@lancaironline.net; Mon, 11 Jun 2007 11:22:18 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.248; envelope-from=bhughes@qnsi.net Content-class: urn:content-classes:message Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C7AC44.DC312D74" Disposition-Notification-To: "Bobby J. Hughes" Subject: RE: [FlyRotary] MSD type Ignition CD or not? was Re: Spark Plug Cleaning X-MimeOLE: Produced By Microsoft Exchange V6.5.6944.0 Date: Mon, 11 Jun 2007 10:23:40 -0600 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] MSD type Ignition CD or not? was Re: Spark Plug Cleaning Thread-Index: AcesORiEeKRjyJgsREeG0HGPKqc/yAAC325Q From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C7AC44.DC312D74 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable It would be nice to get 50 hrs on a set of plugs running 100LL. Is it the leading or trailing plugs that seem to have an issue. Maybe only 2 coils for testing are needed. And larger power \ ground wire. =20 Bobby ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: Monday, June 11, 2007 8:01 AM To: Rotary motors in aircraft Subject: [FlyRotary] MSD type Ignition CD or not? was Re: Spark Plug Cleaning Given the interest in getting rid of SAG - its important that we are all on the same wavelength when discussing components. For example, there are a whole bunch of different MSD ignition systems out there - I'm not certain that they are all Capacitive Discharge types. It may made a difference regarding their ability to avoid/delay on set of SAG. =20 =20 At least Lynn's assessment about the rise time of the CD type driven coils being so fast as not to permit much voltage leakage via the lead deposits and thereby avoiding SAG seemed to make sense to me. =20 =20 So the question to Bob Mears is do you recall whether the MSD system being used was a Capacitive Discharge type? Thanks! =20 Ed ----- Original Message -----=20 From: bmears9413@aol.com=20 To: Rotary motors in aircraft =20 Sent: Monday, June 11, 2007 8:56 AM Subject: [FlyRotary] Re: Spark Plug Cleaning SAG can appear any where apparently. We ran a MSD system on our race care and still ran into the problem. The problem ended when we switched to alcohol, but thats not a fix for airplanes! =09 Bob Mears Supermarine spitfire =09 =09 =09 =20 ------_=_NextPart_001_01C7AC44.DC312D74 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
It would be nice to get 50 hrs on a set of = plugs running=20 100LL. Is it the leading or trailing plugs that seem to have an issue. = Maybe=20 only 2 coils for testing are needed. And larger power \ ground=20 wire.
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Monday, June 11, 2007 8:01 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] MSD type Ignition CD = or not?=20 was Re: Spark Plug Cleaning

Given the interest in getting rid of SAG - its = important=20 that we are all on the same wavelength when discussing components.  = For=20 example, there are a whole bunch of different MSD ignition systems out = there -=20 I'm not certain that they are all Capacitive Discharge types.  It = may made=20 a difference regarding their ability to avoid/delay on set of SAG.  =
 
At least Lynn's assessment about the rise time = of the CD=20 type driven coils being so fast as not to permit much voltage =  leakage via=20 the lead deposits and thereby avoiding SAG seemed to make sense to = me. =20
 
So the question to Bob Mears is do you recall = whether the=20 MSD system being used was a Capacitive Discharge type? =20 Thanks!
 
Ed
----- Original Message -----
From:=20 bmears9413@aol.com
Sent: Monday, June 11, 2007 = 8:56 AM
Subject: [FlyRotary] Re: Spark = Plug=20 Cleaning

SAG can appear any where apparently. We ran=20 a MSD system on our race care and still ran into = the=20 problem. The problem ended when we switched to alcohol, but=20 thats not a fix for airplanes!

Bob=20 Mears
Supermarine spitfire


 
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