X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Received: from mail.fdic.gov ([167.176.6.5] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTPS id 1664551 for flyrotary@lancaironline.net; Mon, 11 Dec 2006 16:00:46 -0500 Received-SPF: pass receiver=logan.com; client-ip=167.176.6.5; envelope-from=brogers@fdic.gov DKIM-Signature: a=rsa-sha1; d=fdic.gov; s=fdic; c=simple; q=dns; t=1165870789; x=1165957189; h=from:date:subject:message-id:content-class:content-type; b=5IFtumE56ehe9bNiGgUpVnR5qamlm0vtH5Q8SfgHJ/l9Ksyx+AmdTZWR38LiGr7MR2uhiY7PK+sRRjRt0bbjQg== X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C71D67.424A6D27" Subject: RE: [FlyRotary] Re: MSD coils - Plug Fouling... again. Date: Mon, 11 Dec 2006 14:59:32 -0600 Message-ID: <15839C662A43B844B6E393DBFEAA90BF057AA882@dalexc101p.prod.fdic.gov> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: MSD coils - Plug Fouling... again. thread-index: AccaccufzgGjOeVqRpmVMB/XLM+oigC8qRIQ From: "Rogers, Bob J." To: "Rotary motors in aircraft" Return-Path: BRogers@FDIC.gov X-OriginalArrivalTime: 11 Dec 2006 20:59:34.0048 (UTC) FILETIME=[42A7D200:01C71D67] This is a multi-part message in MIME format. ------_=_NextPart_001_01C71D67.424A6D27 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Tracy,=20 =20 I noticed that the sparkplugs for the RX-8 (Renesis) engine have a longer reach for the leading plugs (21 mm) than for the trailing plugs (3/4 inch =3D19.05 mm). The earlier 13B engines all use a 3/4 inch = reach plug. See the attached web pages:=20 =20 http://www.ngk.com/results_app.asp?AAIA=3D1192340 http://www.ngk.com/results_app.asp?AAIA=3D1431319 =20 Does the longer reach of 21 mm create any problem for use in the older 13B engines? If one wanted to run a hotter plug in the trailing position, will the longer reach (and hotter) leading plug work in the trailing plug hole? =20 =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook Sent: Thursday, December 07, 2006 8:35 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: MSD coils - Plug Fouling... again. =20 ... =20 I changed my plugs to iridium type (stock Renesis parts) about 210 hours ago and they have been wonderful. Never a hint of 'SAG' but I have run only a few tanks of 100LL during that time. =20 ... ------_=_NextPart_001_01C71D67.424A6D27 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Tracy,

I noticed that the sparkplugs for = the RX-8 (Renesis) engine have a longer reach for the leading plugs (21 mm) than = for the trailing plugs (3/4 inch =3D19.05 mm). The earlier 13B engines all use = a 3/4 inch reach plug. See the = attached web pages:

http://www.ngk= .com/results_app.asp?AAIA=3D1192340

http://www.ngk= .com/results_app.asp?AAIA=3D1431319

Does the longer reach of 21 mm = create any problem for use in the older 13B engines? If one wanted to run a hotter plug in the trailing position, will = the longer reach (and hotter) leading plug work in the trailing plug = hole?

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Thursday, December = 07, 2006 8:35 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = MSD coils - Plug Fouling... again.

…

I changed my plugs to = iridium type (stock Renesis parts) about 210 hours ago and they have been = wonderful. Never a hint of 'SAG' but I have run only a few tanks of 100LL during that = time.

…

=

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