REFLECTOR:High Temps on taxi
Tony Babb
reflector@tvbf.org
Sat, 17 Jan 2004 13:38:02 -0800
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Jack,
Do you have a photo of showing where it was installed? Is the fan one of =
the electric ones you put behind a radiator?
Thanks
Tony
SEFG - still a long way from taxiing, let alone flying.
----- Original Message -----=20
From: jack davis=20
To: reflector@tvbf.org=20
Sent: Saturday, January 17, 2004 9:32 AM
Subject: Re: REFLECTOR:High Temps on taxi
Mike,
I have an automobile after-market cooling fan installed in the bottom =
of my cowl (I have the top NACA scoops for cooling). I only use the fan =
on hot days while taxiing or waiting on the ground. It works extremely =
well in keeping the CHTs in the 320 - 350 degree range. I once had to =
hold on the ground for 25 minutes when the ambient temperature was 96 =
degrees and the CHTs never got above 380 degrees.
It seems, at first, that the fan wouldn't work because of the large =
opening at the cowl exit, but the prop must provide enough pull to keep =
the fan effective. The fan that I have doesn't weigh very much. You =
can get them at any auto store or through the JC Whitney catalog.
Jack
----- Original Message -----=20
From: MikeWatsonSpg@cs.com=20
To: reflector@tvbf.org=20
Sent: Tuesday, January 13, 2004 6:42 PM
Subject: REFLECTOR:High Temps on taxi
OK, from analyzing the answers so far, the cure for high temps on =
taxi and hold
is to:
1} Male sure the plenum is tight around the cylinders. DONE
2} Lean like hell while idling. ALWAYS DO.
3} use bilge fan to cool oil. HAVEN'T DONE THAT YET
4} Make sure cowl is as close to prop as possible. DONE
5} make slots on lower cowl for air to exit.
Scott Swing already tried # 5 with minimal results.
Maybe mounting a big fan (ala Volkswagen) with the top nacca scoop=20
will resolve the heat problem?????
Mike W.
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<DIV><FONT face=3DArial size=3D2>Jack,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Do you have a photo of showing =
where it was=20
installed? Is the fan one of the electric ones you put behind a=20
radiator?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Tony</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>SEFG - still a long way from taxiing, =
let alone=20
flying.</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dn767sd@hotmail.com href=3D"mailto:n767sd@hotmail.com">jack =
davis</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, January 17, =
2004 9:32=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: REFLECTOR:High =
Temps on=20
taxi</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Mike,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I have an automobile after-market =
cooling fan=20
installed in the bottom of my cowl (I have the top NACA scoops for=20
cooling). I only use the fan on hot days while taxiing or =
waiting on the=20
ground. It works extremely well in keeping the CHTs in the 320 - =
350=20
degree range. I once had to hold on the ground for 25 minutes =
when the=20
ambient temperature was 96 degrees and the CHTs never got above 380=20
degrees.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>It seems, at first, that the fan =
wouldn't work=20
because of the large opening at the cowl exit, but the prop must =
provide=20
enough pull to keep the fan effective. The fan that I have =
doesn't weigh=20
very much. You can get them at any auto store or through the JC =
Whitney=20
catalog.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Jack</FONT></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3DMikeWatsonSpg@cs.com=20
href=3D"mailto:MikeWatsonSpg@cs.com">MikeWatsonSpg@cs.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, January 13, =
2004 6:42=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> REFLECTOR:High Temps =
on=20
taxi</DIV>
<DIV><BR></DIV><FONT face=3Darial,helvetica><FONT lang=3D0 =
face=3DArial size=3D2=20
PTSIZE=3D"10" FAMILY=3D"SANSSERIF">OK, from analyzing the answers so =
far, the=20
cure for high temps on taxi and hold<BR>is to:<BR><BR>1} Male sure =
the=20
plenum is tight around the cylinders. DONE<BR>2} Lean =
like hell=20
while idling. ALWAYS DO.<BR>3} use bilge fan to cool=20
oil. HAVEN'T DONE THAT =
YET<BR>4}=20
Make sure cowl is as close to prop as possible. DONE<BR>5} =
make slots=20
on lower cowl for air to exit.<BR><BR>Scott Swing already tried # 5 =
with=20
minimal results.<BR><BR>Maybe mounting a big fan (ala Volkswagen) =
with the=20
top nacca scoop <BR>will resolve the heat problem?????<BR><BR>Mike=20
W.<BR><BR></BLOCKQUOTE></BLOCKQUOTE></FONT></FONT></BODY></HTML>
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