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From: Walter Atkinson <walter@advancedpilot.com>
Subject: Re: [LML] CHT Measurement
X-Original-Date: Mon, 4 Apr 2005 10:51:46 -0500
X-Original-To: "Lancair Mailing List" <lml@lancaironline.net>
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--Apple-Mail-18--968763188
Content-Transfer-Encoding: quoted-printable
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Mike:

Uneven cylinder cooling is a big problem.  It is not at all as uniform=20=

as we would like.  As a general rule, the hottest part is at the 6=20
o'clock position where the probe is...  not always, but generally. =20
Some areas can be quite a bit cooler than others on one cylinder.  That=20=

is not good.  It was that research that led us to create special=20
baffling to address this issue.

Walter


On Apr 4, 2005, at 9:03 AM, MikeEasley@aol.com wrote:


Engine Guys,
=A0
I know the engine doesn't=A0cool very evenly when on the ground.=A0 And =
we=20
only measure CHT at one spot on the bottom of the cylinder.=A0 Is it=20
possible that some areas of our cylinders are getting much warmer, or=20
staying much cooler than the probe is reading?=A0 I'm assuming that, in=20=

flight, that the cylinder temp is more even in all areas due to the=20
increased air flow.=A0 Could baffling (good or bad) send a high amount =
of=20
air to where the probe is, not necessarily cooling the entire cylinder,=20=

and make your number look good on your monitor, but really be cooking=20
your cylinder?
=A0
Mike Easley
Listening and Wondering

--Apple-Mail-18--968763188
Content-Transfer-Encoding: quoted-printable
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Mike:


Uneven cylinder cooling is a big problem.  It is not at all as uniform
as we would like.  As a general rule, the hottest part is at the 6
o'clock position where the probe is...  not always, but generally.=20
Some areas can be quite a bit cooler than others on one cylinder.=20
That is not good.  It was that research that led us to create special
baffling to address this issue.


Walter



On Apr 4, 2005, at 9:03 AM, MikeEasley@aol.com wrote:



<fontfamily><param>Arial</param><smaller>Engine =
Guys,</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>=A0</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>I know the engine
doesn't=A0cool very evenly when on the ground.=A0 And we only measure =
CHT
at one spot on the bottom of the cylinder.=A0 Is it possible that some
areas of our cylinders are getting much warmer, or staying much cooler
than the probe is reading?=A0 I'm assuming that, in flight, that the
cylinder temp is more even in all areas due to the increased air
flow.=A0 Could baffling (good or bad) send a high amount of air to where
the probe is, not necessarily cooling the entire cylinder, and make
your number look good on your monitor, but really be cooking your
cylinder?</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>=A0</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>Mike =
Easley</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>Listening and =
Wondering</smaller></fontfamily>


--Apple-Mail-18--968763188--