REFLECTOR:CONFUSION
Tom Martino
reflector@tvbf.org
Tue, 15 Jul 2003 22:06:14 -0600
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You know what they say about opinions? They're like Assh---s ...
everybody's got one! My problem is ... they're all different.
=20
I have a 173 Elite RG with an IO-540 engine. I just spoke to Alan Shaw
and he swears that a constant speed prop is NOT necessary. He says the
added weight is not worth it and it will actually cut down your cruise
speeds a bit. He said climb performance won't be a problem with that
engine ... and the Velocity will be better off without the extra weight
back there.
=20
He recommended a three-blade performance prop made by Performance Props
in Arizona. He said it should be put on a five inch extension and it
will fit perfectly with the cowl he designed.
=20
He said the fixed pitch also helps with cooling because it can get
closer to the big cowl openings on each side of the prop and it will
actually "suck out" air creating a cooling effect.
=20
He also said that the exhaust pointing straight out the back through two
ports (bottom left and right) will actually cause a venturi effect
inside the cowl ... which will force cool air to exit around it - again
aiding in the cooling of the engine.
=20
He talked for a long time and sounded completely confident and
knowledgeable. =20
=20
Since his advice seems to be contrary to a lot of other opinions ... my
question to you is this:
=20
DOES IT SOUND REASONABLE?
=20
I am getting to a point where I need to make some decisions. Any
feedback will be appreciated. The discussions I have seen here are very
intelligent and I want to take advantage of your BRAINS.
=20
Thanks in advance.
=20
Tom Martino
www.troubleshoter.com <http://www.troubleshoter.com/> =20
=20
=20
=20
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>You know what they say about opinions?<span
style=3D'mso-spacerun:yes'> </span>They’re like Assh---s ... =
everybody’s
got one!<span style=3D'mso-spacerun:yes'> </span>My problem is ... =
they’re
all different.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I have <span class=3DGramE>a 173</span> Elite RG with =
an
IO-540 engine. <span style=3D'mso-spacerun:yes'> </span>I just =
spoke to Alan Shaw
and he swears that a constant speed prop is NOT necessary.<span
style=3D'mso-spacerun:yes'> </span>He says the added weight is not =
worth it and
it will actually cut down your cruise speeds a bit.<span
style=3D'mso-spacerun:yes'> </span>He said climb performance =
won’t be a
problem with that engine ... and the </span></font><st1:PersonName><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Velocity</span></font></st1:=
PersonName><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'> will be
better off without the extra weight back =
there.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>He recommended a three-blade performance prop made by
Performance Props in </span></font><st1:State><st1:place><font size=3D2
face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Arizona</span></font></st1:p=
lace></st1:State><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>.<span
style=3D'mso-spacerun:yes'> </span>He said it should be put on a =
five inch extension
and it will fit perfectly with the cowl he =
designed.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>He said the fixed pitch also helps with cooling =
because it
can get closer to the big cowl openings on each side of the prop and it =
will actually
“suck out” air creating a cooling =
effect.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>He also said that the exhaust pointing straight out =
the back
through two ports (bottom left and right) will actually cause a venturi =
effect inside
the cowl ... which will force cool air to exit around it – again =
aiding
in the cooling of the engine.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>He talked for a long time and sounded completely =
confident
and knowledgeable.<span style=3D'mso-spacerun:yes'> =
</span><o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Since his advice seems to be contrary to a lot of =
other
opinions ... my question to you is this:<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>DOES IT SOUND =
REASONABLE?<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>I am getting to a point where I need to make some
decisions.<span style=3D'mso-spacerun:yes'> </span>Any feedback =
will be
appreciated.<span style=3D'mso-spacerun:yes'> </span>The =
discussions I have seen
here are very intelligent and I want to take advantage of your =
BRAINS.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Thanks in advance.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><st1:PersonName><font size=3D2 face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Tom =
Martino</span></font></st1:PersonName><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p=
>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><a =
href=3D"http://www.troubleshoter.com/">www.troubleshoter.com</a>
<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
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