REFLECTOR:Engine ram air
KeithHallsten
reflector@tvbf.org
Wed, 20 Aug 2003 16:52:35 -0700
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Rene',
I have no particular expertise on this subject to share with you, but =
this month's Sport Aviation has an article on engine cooling that may =
have some principles you can put to work.
Keith
=20
----- Original Message -----=20
From: Rene Dugas=20
To: reflector@tvbf.org=20
Sent: Wednesday, August 20, 2003 10:18 AM
Subject: REFLECTOR:Engine ram air
I've asked this before but did not get an answer. I am no engineer =
either. How big should the opening be on a ram air scoop feeding air to =
the engine on an IO 540 at 2300 rpm's? I understand it is best to not =
have the scoop any bigger than necessary because of the overflow forms a =
slow mushroom of backed up air pushed ahead of the scoop. Any takers? =
Mine is about 2.5 by 2.75" expanding into an airbox with a K& N filter =
then into the 3 inch orifice under the engine.
Rene'
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<DIV><FONT face=3DArial size=3D2>Rene',</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I have no particular expertise on this =
subject to=20
share with you, but this month's Sport Aviation has an article on engine =
cooling=20
that may have some principles you can put to work.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Keith</FONT></DIV>
<DIV> </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=3Drdugas@bayou.com href=3D"mailto:rdugas@bayou.com">Rene =
Dugas</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> Wednesday, August 20, =
2003 10:18=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> REFLECTOR:Engine ram =
air</DIV>
<DIV><BR></DIV>
<DIV class=3DSection1>
<P class=3DMsoNormal><FONT face=3D"Trebuchet MS" color=3D#663333 =
size=3D3><SPAN=20
style=3D"FONT-SIZE: 12pt">I=92ve asked this before but did not get an=20
answer. I am no engineer either. How big should the =
opening be on=20
a ram air scoop feeding air to the engine on an IO 540 at 2300 =
rpm=92s? I=20
understand it is best to not have the scoop any bigger than necessary =
because=20
of the overflow forms a slow mushroom of backed up air pushed ahead of =
the=20
scoop. Any takers? Mine is about 2.5 by 2.75=94 expanding =
into an=20
airbox with a K& N filter then into the 3 inch orifice under the=20
engine.</SPAN></FONT></P>
<P class=3DMsoNormal><FONT face=3D"Trebuchet MS" color=3D#663333 =
size=3D3><SPAN=20
style=3D"FONT-SIZE: =
12pt">Rene=92</SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>
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