X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 02 Jun 2008 15:49:44 -0400 Message-ID: X-Original-Return-Path: Received: from sfa.gami.com ([68.89.254.162] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTP id 2949355 for lml@lancaironline.net; Mon, 02 Jun 2008 09:17:44 -0400 Received-SPF: none receiver=logan.com; client-ip=68.89.254.162; envelope-from=gwbraly@gami.com Received: from localhost (localhost.localdomain [127.0.0.1]) by sfa.gami.com (Postfix) with ESMTP id 5116129C073 for ; Mon, 2 Jun 2008 08:17:03 -0500 (CDT) Received: from gamimail1.Gami.local (unknown [10.10.10.33]) by sfa.gami.com (Postfix) with ESMTP id 2B49F29C06E for ; Mon, 2 Jun 2008 08:16:55 -0500 (CDT) Received: from gamimail1.Gami.local ([10.10.10.33]) by gamimail1.Gami.local ([10.10.10.33]) with mapi; Mon, 2 Jun 2008 08:16:50 -0500 From: George Braly X-Original-To: Lancair Mailing List X-Original-Date: Mon, 2 Jun 2008 08:16:52 -0500 Subject: RE: [LML] Re: Sparking plugs Thread-Topic: [LML] Re: Sparking plugs Thread-Index: AcjEW6TkJQ+XMWUCQB+17/6I9/5jqQAVxoyg X-Original-Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C273A1B35F3C6748B52EE0CC2FCEE96C6E38E25902gamimail1Gami_" MIME-Version: 1.0 X-Virus-Scanned: by amavisd-new-2.3.2 (20050629) (Debian) at gami.com --_000_C273A1B35F3C6748B52EE0CC2FCEE96C6E38E25902gamimail1Gami_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Actually, the question should be more properly asked as follows: ****** so... what was the measured temperature of the plug ceramic tips (bo= th top and bottom plugs) with the engine at full power and leaned for best= power ... and the cylinder heads at temperatures close to redline *** ? That is the question. No "appearances" . Just some hard numbers. ________________________________ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Geor= ge Braly Sent: Sunday, June 01, 2008 9:52 PM To: lml@lancaironline.net Subject: [LML] Re: Sparking plugs so... what was the measured temperature of the plug ceramic tips with the = engine at full power and leaned for best power ? That is the question. No "appearances" . Just some hard numbers. ________________________________ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Paul= Lipps Sent: Sunday, June 01, 2008 7:36 PM To: lml@lancaironline.net Subject: [LML] Sparking plugs I spoke with Klaus of LSE about this plug thingy, and he said he did resear= ch on this with instrumented plugs 12-15 years ago. The results were writte= n-up in an article in Sport Aviation about that time. He says that a plug i= n the proper heat range will have the insulator covered with a light tan th= at varies in shade from slightly darker to slightly lighter; if it is an ev= en shade then it is running a little too hot. Cracked insulators on a plug = is a sign of detonation. He reminded me that those planes racing at Reno wi= th LSE ignition and recommended automotive plugs have never had a cylinder = go bad, but several planes with aircraft plugs have. He also said that thos= e fellows running full-out at 250 mph TAS or more on the race to Oshkosh at= 2000' will have 2" MAP boost and will be running at or above 100% power th= e whole way! He also claims that none of those racing who have LSE EI have = had a problem with detonation or pre-ignition. --_000_C273A1B35F3C6748B52EE0CC2FCEE96C6E38E25902gamimail1Gami_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Actually, the question should be more prop= erly=20 asked as follows:

****** so...=20 what was the measured temperature of the plug ceramic tips (both top and bottom plugs) with th= e=20 engine at full power and leaned for best power ... and the cylinder heads at temperatures clos= e to=20 redline *** ?

That is the question. No "appearances" = . =20 Just some hard numbers.

From: Lancair Mailing List=20 [mailto:lml@lancaironline.net] On Behalf Of George Braly
Sent:= =20 Sunday, June 01, 2008 9:52 PM
To:=20 lml@lancaironline.net
Subject: [LML] Re: Sparking=20 plugs

so... what was the measured temperature of the plu= g ceramic=20 tips with the engine at full power and leaned for best power=20 ?

That is the question. No "appearances" = . =20 Just some hard numbers.

<= /DIV>

From: Lancair Mailing List=20 [mailto:lml@lancaironline.net] On Behalf Of Paul Lipps
Sent:=20 Sunday, June 01, 2008 7:36 PM
To:=20 lml@lancaironline.net
Subject: [LML] Sparking=20 plugs

I spoke with Klaus of LSE about this plug thingy, a= nd he=20 said he did research on this with instrumented plugs 12-15 years ago. The=20 results were written-up in an article in Sport Aviation about that time. He= says=20 that a plug in the proper heat range will have the insulator covered with a= =20 light tan that varies in shade from slightly darker to slightly lighter; if= it=20 is an even shade then it is running a little too hot. Cracked insulators on= a=20 plug is a sign of detonation. He reminded me that those planes racing at Re= no=20 with LSE ignition and recommended automotive plugs have never had a cylinde= r go=20 bad, but several planes with aircraft plugs have. He also said that those=20 fellows running full-out at 250 mph TAS or more on the race to Oshkosh= at=20 2000' will have 2" MAP boost and will be running at or above 100% power the= =20 whole way! He also claims that none of those racing who have LSE = EI=20 have had a problem with detonation or pre-ignition.
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