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Date: Mon, 31 Jan 2011 08:17:01 -0500
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From: PAUL HERSHORIN <paulhershorin@bellsouth.net>
Subject: Re: [LML] Need advice on improving cooling
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I had to close off the air going to the oil cooler from #3 and I put in a=
=A0nacko (sp) duct in my top cowling to the oil cooler. This lowered my oil=
 temps to 200-210 for clumb out and my cht and egt were lowered to acceptab=
le temps.=A0 On hot days in South Florida if I am held on the runway I stil=
l have to be very concerned--I will clumb to 500 level off and get the temp=
s down and then climb on up--mixture rich the entire time until leveled off=
.
Paul Hershorin
S. Florida
360 lnc2

--- On Sat, 1/29/11, Bryan Wullner <vonjet@gmail.com> wrote:


From: Bryan Wullner <vonjet@gmail.com>
Subject: [LML] Need advice on improving cooling
To: lml@lancaironline.net
Date: Saturday, January 29, 2011, 11:36 PM


My airplane: Lancair 360, 180hp 360 carburated. I have a plenum to cool and=
 I am feeding the oil cooler with air off the #3 cyl.
My chts are high on the ground and takeoff. The oil temp is high on the gro=
und as well. Its to the point where I can't takeoff if I'm on the ground to=
o long. And the hotter days aren't even here yet.
Also my carb temp climbs on the ground and pegs at the gauge limit of 127 d=
egrees. I've replaced the probe and the manufacturer seems to think its ope=
rating normally. This would make me believe my lower cowling area is gettin=
g hot and not enough air flowing out of it.
My AP has checked my engine, compression, timing etc and doesn't believe th=
ere is any issues with it. The cooler is a 9 vane SW that was new when inst=
alled.
My plan was to add cowling louvers to the lower cowling on each side below =
the cyl banks.=A0 I would hope this would improve the air movement out the =
cowling.=20
I read that cht probes could read high if they run close to the exhaust in =
a tight cowling. Mine do. Also the carb probe is kind of close to the exhau=
st as well. Not sure if this is my case. All my baffles are in place and pr=
operly sealed.=20
Anybody have any advice on where to place these or other ideas that would i=
mprove cooling or things to check
Bryan
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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"=
top" style=3D"font: inherit;"><DIV>I had to close off the air going to the =
oil cooler from #3 and I put in a&nbsp;nacko (sp) duct in my top cowling to=
 the oil cooler. This lowered my oil temps to 200-210 for clumb out and my =
cht and egt were lowered to acceptable temps.&nbsp; On hot days in South Fl=
orida if I am held on the runway I still have to be very concerned--I will =
clumb to 500 level off and get the temps down and then climb on up--mixture=
 rich the entire time until leveled off.</DIV>
<DIV>Paul Hershorin</DIV>
<DIV>S. Florida</DIV>
<DIV>360 lnc2<BR><BR>--- On <B>Sat, 1/29/11, Bryan Wullner <I>&lt;vonjet@gm=
ail.com&gt;</I></B> wrote:<BR></DIV>
<BLOCKQUOTE style=3D"BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5=
px; MARGIN-LEFT: 5px"><BR>From: Bryan Wullner &lt;vonjet@gmail.com&gt;<BR>S=
ubject: [LML] Need advice on improving cooling<BR>To: lml@lancaironline.net=
<BR>Date: Saturday, January 29, 2011, 11:36 PM<BR><BR>
<DIV id=3Dyiv83204724>
<DIV>My airplane: Lancair 360, 180hp 360 carburated. I have a plenum to coo=
l and I am feeding the oil cooler with air off the #3 cyl.</DIV>
<DIV>My chts are high on the ground and takeoff. The oil temp is high on th=
e ground as well. Its to the point where I can't takeoff if I'm on the grou=
nd too long. And the hotter days aren't even here yet.</DIV>
<DIV>Also my carb temp climbs on the ground and pegs at the gauge limit of =
127 degrees. I've replaced the probe and the manufacturer seems to think it=
s operating normally. This would make me believe my lower cowling area is g=
etting hot and not enough air flowing out of it.</DIV>
<DIV>My AP has checked my engine, compression, timing etc and doesn't belie=
ve there is any issues with it. The cooler is a 9 vane SW that was new when=
 installed.</DIV>
<DIV>My plan was to add cowling louvers to the lower cowling on each side b=
elow the cyl banks.&nbsp; I would hope this would improve the air movement =
out the cowling. <BR>I read that cht probes could read high if they run clo=
se to the exhaust in a tight cowling. Mine do. Also the carb probe is kind =
of close to the exhaust as well. Not sure if this is my case. All my baffle=
s are in place and properly sealed. </DIV>
<DIV>Anybody have any advice on where to place these or other ideas that wo=
uld improve cooling or things to check</DIV>
<DIV>Bryan</DIV></DIV></BLOCKQUOTE></td></tr></table>
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