Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Sun, 28 Mar 2004 09:45:02 -0500 Message-ID: X-Original-Return-Path: Received: from sccimhc02.asp.att.net ([63.240.76.164] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3130765 for lml@lancaironline.net; Sun, 28 Mar 2004 06:42:02 -0500 Received: from new (12-217-88-233.client.mchsi.com[12.217.88.233]) by sccimhc02.asp.att.net (sccimhc02) with SMTP id <20040328114202im200rndq3e>; Sun, 28 Mar 2004 11:42:02 +0000 X-Original-Message-ID: <005601c414b9$ecfd3920$f004fea9@new> From: "Cy Galley" X-Original-To: "Lancair Mailing List" Subject: Fw: [LML] relative temps? X-Original-Date: Sun, 28 Mar 2004 05:43:44 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0053_01C41487.A2306E80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0053_01C41487.A2306E80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable From another list Valve guide is worn - - serial compression checks are in order. -----Original Message----- From: beech-owners-bounces@beechcraft.org [mailto:beech-owners-bounces@beechcraft.org] On Behalf Of Max Hegler Sent: Saturday, March 27, 2004 10:32 PM To: beech-owners@beechcraft.org Subject: B: Fluctuating EGT.. Today I had an unusual EGT indication on the #2 cylinder (IO 520BA). At cruise, the EGT started rapidly fluctuating 25 to 30 degrees. CHT was fine=20 and running about 360. All other EGTs and CHTs were running steady. I=20 usually monitor #2 cylinder as it is the hottest. Flight was at 9500 ant=20 10500 with outside temps about 4C in clear conditions. Cruising about 165=20 KTAS at 40 LOP. I was thinking about switching #2 and #4 probes tomorrow=20 and see it the indication follows the probe. Any other suggestions? ----- Original Message -----=20 From: Cy Galley=20 To: Lancair Mailing List=20 Sent: Sunday, March 28, 2004 5:40 AM Subject: Re: [LML] relative temps? The point being that even the maximum temperature shown will change = relative to altitude and a bunch of the many the other parameters. It = changes and is not static, Further since they are self generators, they = are not really calibrated. A true system would take into account the = cold (meter) junction cabin temperature as well. ----- Original Message -----=20 From: Gary Rodgers=20 To: Lancair Mailing List=20 Sent: Saturday, March 27, 2004 10:40 PM Subject: [LML] relative temps? Cy < Since you are measuring the heat output, anything and every thing = that effects engine power will effect the temperature. Probe location, = cylinder cooling, ambient air temp, altitude, throttle setting, turbo = boost if you have it, engine condition, timing, spark plug condition, = air humidity, mag condition, impulse spring condition, exhaust system = condition, gasoline. airfilter condition, and I'll bet there are some I = have missed. Between cylinders the probe location, valve condition, = baffling(cooling), and injectors can and do change the indicated temps = for each cylinder.> Guess I'm confused about your 'relative' reference as well. All the = conditions you describe affect the output temp of the cylinder exhaust, = but that doesn't mean that the actual recorded/reported temperature = isn't the real temperature that must be considered when operating the = engine within the temperature tolerance of the components. Or am I = missing something? Gary R ------=_NextPart_000_0053_01C41487.A2306E80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

From another=20 list

Valve guide is=20 worn - - serial compression checks are in order.

-----Original=20 Message-----
From: beech-owners-bounces@beechcraft.org
[mailto:beech-owners-bounces@beechcraft.org] On=20 Behalf Of Max Hegler
Sent: Saturday, March 27, 2004 10:32 PM
To: = beech-owners@beechcraft.org
Subject: B: Fluctuating EGT..

Today I had an unusual EGT = indication on the #2 cylinder (IO 520BA). At

cruise, the = EGT=20 started rapidly fluctuating 25 to 30 degrees. CHT was
fine =
and=20 running about 360. All other EGTs and CHTs were running = steady. I=20
usually monitor #2 cylinder as it is the hottest. Flight was = at=20 9500
ant
10500 with outside temps about 4C in clear = conditions. =20 Cruising about
165
KTAS at 40 LOP. I was thinking about = switching=20 #2 and #4 probes
tomorrow
and see it the indication follows the=20 probe. Any other suggestions?

----- Original Message -----=20

From: Cy Galley =

To: Lancair Mailing List

Sent: Sunday, March 28, 2004 5:40 AM

Subject: Re: [LML] relative temps?

The point being that even the maximum = temperature=20 shown will change relative to altitude and a bunch of the many the = other=20 parameters. It changes and is not static, Further since they are self=20 generators, they are not really calibrated. A true system would = take into=20 account the cold (meter) junction cabin temperature as = well.

----- Original Message -----
From:=20 Gary=20 Rodgers
To: Lancair Mailing List

Sent: Saturday, March 27, 2004 = 10:40=20 PM

Subject: [LML] relative = temps?

Cy

<=20 Since you are measuring the heat output, = anything and=20 every thing that effects engine power will effect the temperature. = Probe=20 location, cylinder cooling, ambient air temp, altitude, throttle = setting,=20 turbo boost if you have it, engine condition, timing, spark plug = condition,=20 air humidity, mag condition, impulse spring condition, exhaust system=20 condition, gasoline. airfilter condition, and I'll bet there are = some I=20 have missed. Between cylinders the probe location, valve condition,=20 baffling(cooling), and injectors can and do change the indicated temps = for=20 each cylinder.>

Guess I'm = confused about your=20 'relative' reference as well. All the conditions you describe = affect the=20 output temp of the cylinder exhaust, but that doesn't mean that the=20 actual recorded/reported temperature isn't the real = temperature that=20 must be considered when operating the engine within the temperature = tolerance=20 of the components. Or am I missing = something?

Gary R

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