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<DIV><SPAN class=150510022-05022003><FONT face=Arial color=#0000ff size=2>I had
a mid-air this last summer that slightly damaged the nose of my plane. Eric H.
suggested that when I repair the nose, I should add an air scoop just above the
rear bearing of my YS-120FZ. He said that it would help cool the rear bearings
and would improve my top RPM. Guess what? He's right! My engine had a little
more power. The rev's increased about 100 to 150 RPM on the ground and I noticed
an improvement in the verticals. So, now I'm finishing a new fuse and I'm adding
another air scoop over the rear of my YS-140FZ. I think it will
help.</FONT></SPAN></DIV>
<DIV><SPAN class=150510022-05022003><FONT face=Arial color=#0000ff size=2>Tom
Weedon</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> discussion-request@nsrca.org
[mailto:discussion-request@nsrca.org]<B>On Behalf Of </B>Adam
Quennoz<BR><B>Sent:</B> Tuesday, February 04, 2003 8:34 PM<BR><B>To:</B>
Pattern List<BR><B>Subject:</B> Thoughts about air
scoops.<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>It seems the trend these days are air
scoops. Before a scoop is effective, the area of the air exit must
equal or exceed that of the air intake thus allowing a positve air flow to
occur. With all the scoops people are putting on the nose of the
aircraft, there must be a pretty good sized hole somewhere for the air to
escape. There are cheek scoops, chin scoops and now with the concern of
cooling the crank cases, there are scoops above the engine compartment.
I call them "nose scoops". </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Has anyone thought of making EXITS on
the top of the nose above the engine, and/or exits on the cheeks?
Basically put the scoops on backwards. The air flowing over the
backward facing scoop would actually create lower pressure inside the engine
compartment allowing a larger volume of air to enter the chin
scoop. The air entering the chin scoop can flow all around the engine as
it makes way to the exits of the engine compartment, and what's
left can flow down the pipe tunnel. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'd like to hear what others have to say
about this idea. I'm thinking of trying it on my pattern
plane.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Regards,<BR>Adam Quennoz<BR>AMA 383866<BR>IMAC
2439<BR>NSRCA 3546<BR></FONT></DIV></BLOCKQUOTE></BODY></HTML>