REFLECTOR:INTAKE COMBUSTION AIR
Ronnie Brown
reflector@tvbf.org
Sat, 13 Sep 2003 23:43:32 -0400
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I have a 173 Elite RG with IO 360 C1C and only one oil cooler - up =
front. I ran my oil lines down separate sides of the fuselage and I =
didn't have to cut any vents. If I were having a problem with oil being =
to hot, then I would open up the ducts to allow air to pass by the oil =
lines. There is a lot of surface area in these oil lines and it would =
increase the cooling if needed. My oil is running around 210 or less in =
this 90 degree heat. A bit warm but not out of reason. My heads are =
running less than 350 with the downdraft NACA cooling.
Ronnie
----- Original Message -----=20
From: Tom Martino=20
To: reflector@www.tvbf.org=20
Sent: Saturday, September 13, 2003 9:02 PM
Subject: REFLECTOR:INTAKE COMBUSTION AIR
On most of the Vs I've seen ... all of the air to the engine comes in =
from above through the naca vents. The air is then directed over the =
cooling fins of the cylinders. There are also 2 ducts that divert some =
of that air. One duct goes to oil cooler and the other duct provides =
combustible air for the engine.
=20
I have been wonderings if the engine would run more efficiently if I =
put a separate air intake scoop (low profile) on the lower cowl. This =
looks as if it would provide a more direct and cooler flow of air. And =
it wouldn't divert any of the cooling air away from the cylinders.
=20
And while on the topic of cooling ... is it really necessary to have =
two oil coolers? Is the one up front good enough?
=20
I saw one Velocity that had only one (up front) then had tiny side =
vents along the fuselage which directed air into the ducting that =
carries the oil lines.
=20
So is there anyone using just one oil cooler up front and not the one =
ion the engine compartment? I would appreciate any insight into either =
of these topics.
=20
=20
=20
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<DIV><FONT size=3D2>I have a 173 Elite RG with IO 360 C1C and only one =
oil cooler=20
- up front. I ran my oil lines down separate sides of the fuselage =
and I=20
didn't have to cut any vents. If I were having a problem with oil =
being to=20
hot, then I would open up the ducts to allow air to pass by the oil =
lines. =20
There is a lot of surface area in these oil lines and it would increase =
the=20
cooling if needed. My oil is running around 210 or less in this 90 =
degree=20
heat. A bit warm but not out of reason. My heads are running less =
than 350=20
with the downdraft NACA cooling.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Ronnie</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=3Dtmartino@troubleshooter.com=20
href=3D"mailto:tmartino@troubleshooter.com">Tom Martino</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@www.tvbf.org=20
href=3D"mailto:reflector@www.tvbf.org">reflector@www.tvbf.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, September 13, =
2003 9:02=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> REFLECTOR:INTAKE =
COMBUSTION=20
AIR</DIV>
<DIV><BR></DIV>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">On most of the Vs =
I’ve seen ...=20
all of the air to the engine comes in from above through the naca =
vents.<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>The air is then directed =
over the=20
cooling fins of the cylinders.<SPAN style=3D"mso-spacerun: yes"> =
</SPAN>There are also 2 ducts that divert some of that air.<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>One duct goes to oil cooler =
and the=20
other duct provides combustible air for the=20
engine.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I have been wonderings =
if the=20
engine would run more efficiently if I put a separate air intake scoop =
(low=20
profile) on the lower cowl. <SPAN style=3D"mso-spacerun: =
yes"> </SPAN>This=20
looks as if it would provide a more direct and cooler flow of =
air.<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>And it wouldn’t divert =
any of the=20
cooling air away from the cylinders.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">And while on the topic =
of cooling=20
... is it really necessary to have two oil coolers?<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>Is the one up front good=20
enough?<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I saw one=20
</SPAN></FONT><st1:PersonName><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Velocity</SPAN></FONT></st1:PersonName><FONT=20
face=3DArial size=3D2><SPAN style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"> that had=20
only one (up front) then had tiny side vents along the fuselage which =
directed=20
air into the ducting that carries the oil =
lines.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">So is there anyone using =
just one=20
oil cooler up front and not the one ion the engine compartment? <SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>I would appreciate any =
insight=20
into either of these topics.<o:p></o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20
style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt; mso-no-proof: =
yes"> </SPAN><o:p></o:p></FONT></P>
<P class=3DMsoNormal><FONT face=3D"Times New Roman" size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML=
>
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