REFLECTOR:173RG - IO-540 COMBO ... OH NO!
Scott Baker
reflector@tvbf.org
Fri, 18 Jul 2003 19:54:31 -0400
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Tom,
I have had extensive discussions with MT-Propeller regarding your =
airframe-engine combination. They recommend a 4-blade MTV-18 model =
propeller with a 66" disk diameter. Denis Wood (the chap who recently =
flew the Atlantic Ocean in his Lycoming 260hp IO-540 engine Velocity =
173RG) and Chuck Leher (who is building a similar model at the Velocity =
Service Center in Sebastian, FL) both have this propeller. It is =
working marvelously in Denis's aircraft. You may be able to "chop" the =
length of your propeller to gain additional ground clearance - I will =
check on this for you. However, I doubt that the result will be as =
efficient as a 4-blade that is designed for this purpose. Note: You =
will be able to sell your MTV-9 propeller. So I would recommend going =
with the 4-blade and sell the 3-blade. The $$ difference is not as bad =
as you might imagine. Pls call me at the factory on Monday to discuss =
772-589-1860.
Best regards,
Scott Baker
----- Original Message -----=20
From: Tom Martino=20
To: reflector@www.tvbf.org=20
Sent: Friday, July 18, 2003 6:58 PM
Subject: REFLECTOR:173RG - IO-540 COMBO ... OH NO!
Please, please, please ... I need information. I know there are a few =
weirdoes like me who chose to put the IO-540 on the 173RG. And I know =
there are some special challenges ... but have any of you run into this =
yet?
=20
I did some rotation tests with my brand new three-blade MT Prop. =
Ouch! I can't use it. The prop will strike at a normal rotation. So I =
did some measuring ... and unless I'm crazy ... it looks like I need 30" =
blades to be safe! That's only a 60" prop!
=20
Can that be so? I believe I did not exaggerate the rotation. And my =
plane in standard in every way (except for the engine).
=20
The factory told me I could expect a problem with clearance ... but =
they said they had a plane there that flew away with my combo and a =
four-blade prop. Was it longer than 60"? Was the point of rotation =
changed by moving the gear? (that would be too late for me).
=20
What is the alternative?
=20
My prop show (an MT Dealer) says the factory may be able to come up =
with a custom five-blade prop for my 325 horsepower configuration. Of =
course, I would only have to get a large home equity loan!
=20
HELP!!!!!!!!
=20
=20
=20
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<DIV><FONT face=3DArial size=3D2>Tom,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I have had extensive discussions with =
MT-Propeller=20
regarding your airframe-engine combination. They recommend a =
4-blade=20
MTV-18 model propeller with a 66" disk diameter. Denis Wood (the =
chap who=20
recently flew the Atlantic Ocean in his Lycoming 260hp IO-540 engine =
Velocity=20
173RG) and Chuck Leher (who is building a similar model at the Velocity =
Service=20
Center in Sebastian, FL) both have this propeller. It is working=20
marvelously in Denis's aircraft. You may be able to "chop" the =
length of=20
your propeller to gain additional ground clearance - I will check on =
this for=20
you. However, I doubt that the result will be as efficient as a =
4-blade=20
that is designed for this purpose. Note: You will be able to =
sell=20
your MTV-9 propeller. So I would recommend going with the 4-blade =
and sell=20
the 3-blade. The $$ difference is not as bad as you might =
imagine. =20
Pls call me at the factory on Monday to discuss =
772-589-1860.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Best regards,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Scott Baker</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> Friday, July 18, 2003 =
6:58 PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> REFLECTOR:173RG - =
IO-540 COMBO=20
... OH NO!</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">Please, please, please =
... I need=20
information.<SPAN style=3D"mso-spacerun: yes"> </SPAN>I know =
there are a=20
few weirdoes like me who chose to put the IO-540 on the 173RG.<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>And I know there are some =
special=20
challenges ... but have any of you run into this=20
yet?<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 did some rotation =
tests with my=20
brand new three-blade MT Prop.<SPAN style=3D"mso-spacerun: yes"> =
</SPAN>Ouch!<SPAN style=3D"mso-spacerun: yes"> </SPAN>I can=92t =
use it.<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>The prop will strike at a =
normal=20
rotation.<SPAN style=3D"mso-spacerun: yes"> </SPAN>So I did some =
measuring=20
... and unless I=92m crazy ... it looks like I need 30=94 blades to be =
safe!<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>That=92s only a 60=94=20
prop!<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">Can that be so?<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>I believe I did not =
exaggerate the=20
rotation.<SPAN style=3D"mso-spacerun: yes"> </SPAN>And my plane =
in=20
standard in every way (except for the =
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">The factory told me I =
could expect=20
a problem with clearance ... but they said they had a plane there that =
flew=20
away with my combo and a four-blade prop. <SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>Was it longer than =
60=94?<SPAN=20
style=3D"mso-spacerun: yes"> </SPAN>Was the point of rotation =
changed by=20
moving the gear? (that would be too late for =
me).<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">What is the=20
alternative?<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">My prop show (an MT =
Dealer) says=20
the factory may be able to come up with a custom five-blade prop for =
my 325=20
horsepower configuration. <SPAN style=3D"mso-spacerun: =
yes"> </SPAN>Of=20
course, I would only have to get a large home equity=20
loan!<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">HELP!!!!!!!!<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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