X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 01 Jun 2008 20:36:26 -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 2948191 for lml@lancaironline.net; Sun, 01 Jun 2008 09:09:10 -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 335D129C06E for ; Sun, 1 Jun 2008 08:08:32 -0500 (CDT) Received: from gamimail1.Gami.local (unknown [10.10.10.33]) by sfa.gami.com (Postfix) with ESMTP id BB74E29C05E for ; Sun, 1 Jun 2008 08:08:29 -0500 (CDT) Received: from gamimail1.Gami.local ([10.10.10.33]) by gamimail1.Gami.local ([10.10.10.33]) with mapi; Sun, 1 Jun 2008 08:08:24 -0500 From: George Braly X-Original-To: Lancair Mailing List X-Original-Date: Sun, 1 Jun 2008 08:08:24 -0500 Subject: RE: [LML] plugs, etc. Thread-Topic: [LML] plugs, etc. Thread-Index: AcjD5bQSVGYTstzbS1evaIDmhJQQCwAAejMw 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_C273A1B35F3C6748B52EE0CC2FCEE96C6DE070EC1Egamimail1Gami_" MIME-Version: 1.0 X-Virus-Scanned: by amavisd-new-2.3.2 (20050629) (Debian) at gami.com --_000_C273A1B35F3C6748B52EE0CC2FCEE96C6DE070EC1Egamimail1Gami_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Paul, >>'Seems to me that is some of the best instrumentation you could have of t= he correct heat range of the plug, bar none.<< I respectfully disagree. Here is why: "Appearance" as in 'seams to me' - - is just a corollary = to the "hope is a method [not] " frame of mind that is really not app= ropriate for aircraft related activities. I have instrumented up plugs and flown them. These plugs covered several heat ranges. They all ended up looking the sa= me to random observers - - and their critical core temperatures covered a s= ufficiently wide range to qualify as "good" or "marginal". Regards, George ________________________________ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Paul= Lipps Sent: Sunday, June 01, 2008 7:48 AM To: lml@lancaironline.net Subject: [LML] plugs, etc. Gary! You made an excellent point about looking at the plug to determine if= it is the right heat range. I remember the illustrations in my auto manual= s that showed the pictures of plugs that were too cold, too hot, or just ri= ght. 'Seems to me that is some of the best instrumentation you could have o= f the correct heat range of the plug, bar none. Too hot and the insulator w= as blistered; too cold and it was covered with eposits; just right and it h= ad a nice, light tan coating on the insulator! BTW, Lycoming is making avai= lable cylinders drilled and tapped for automotive plugs. Maybe somebody sho= uld warn them. Or maybe they have done some testing with EI systems and fou= nd them acceptable; they have! --_000_C273A1B35F3C6748B52EE0CC2FCEE96C6DE070EC1Egamimail1Gami_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Paul,

>>'Seems to m= e that is=20 some of the best instrumentation you could have of the correct heat range o= f the=20 plug, bar none.<<

I respectfully disagree.

Her= e is why: =20 "Appearance" as in 'seams to me' - - is just a=20 corollary to the "hope is a method [not]=20 " frame of mind&nb= sp;=20 that is really not appropriate for aircraft related activities.=20

I have instrumented up plugs and flown=20 them.

These plugs covered several heat ranges. The= y=20 all ended up looking the same to random observers - - and their criti= cal=20 core temperatures covered a sufficiently wide range to qualify as "good" or= =20 "marginal".

Regards, George

From: Lancair Mailing List=20 [mailto:lml@lancaironline.net] On Behalf Of Paul Lipps
Sent:=20 Sunday, June 01, 2008 7:48 AM
To:=20 lml@lancaironline.net
Subject: [LML] plugs, etc.

Gary! You made an excellent point about looking at = the=20 plug to determine if it is the right heat range. I remember the illustratio= ns in=20 my auto manuals that showed the pictures of plugs that were too cold, too h= ot,=20 or just right. 'Seems to me that is some of the best instrumentation you co= uld=20 have of the correct heat range of the plug, bar none. Too hot and the insul= ator=20 was blistered; too cold and it was covered with eposits; just right and it = had a=20 nice, light tan coating on the insulator! BTW, Lycoming is making available= =20 cylinders drilled and tapped for automotive plugs. Maybe somebody should wa= rn=20 them. Or maybe they have done some testing with EI systems and found them=20 acceptable; they have!
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