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Date: Sat, 14 Mar 2009 07:32:47 -0400
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From: "Art Bertolina" <artbertolina@earthlink.net>
References: <list-3545741@logan.com>
Subject: Re: [LML] Re: LOP vs ROP Climb: Time and Fuel Burn (LIVP)
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Re: [LML] LOP vs ROP Climb: Time and Fuel Burn (LIVP)would like to hear =
what George or Walter could add to=20
this conversation. It was my understanding that higher RPM
is better for the engine, as long as the prop is not driving
engine
Art =20
  ----- Original Message -----=20
  From: Colyn Case at earthlink=20
  To: lml@lancaironline.net=20
  Sent: Thursday, March 12, 2009 4:30 PM
  Subject: [LML] Re: LOP vs ROP Climb: Time and Fuel Burn (LIVP)


  Chuck said,
  So, if you are going to reduce power, between MP or RPM, it is better =
to reduce MP since higher RPM keeps PP lower, at least that was their =
general conclusion, supported by engine shop experience.

  I agree at high power settings for the reasons cited,  but once you =
get down to cruise power settings, if you are going to reduce power =
further, reducing rpm removes some friction component while reducing mp =
does not.  therefore you should get better mileage by lowering rpm.
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(LIVP)</TITLE>
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<DIV><FONT face=3DArial size=3D2>would like to hear what George or =
Walter could add=20
to </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>this conversation. It was my =
understanding that=20
higher RPM</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>is better for the engine, as long as =
the prop is=20
not driving</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>engine</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Art&nbsp;&nbsp;</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=3Dcolyncase@earthlink.net =
href=3D"mailto:colyncase@earthlink.net">Colyn=20
  Case at earthlink</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dlml@lancaironline.net=20
  href=3D"mailto:lml@lancaironline.net">lml@lancaironline.net</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, March 12, 2009 =
4:30=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [LML] Re: LOP vs ROP =
Climb: Time=20
  and Fuel Burn (LIVP)</DIV>
  <DIV><BR></DIV>
  <DIV><FONT face=3DArial size=3D2>Chuck said,</FONT></DIV>
  <DIV><SPAN class=3D265045914-12032009><FONT face=3DArial =
color=3D#0000ff size=3D2>So,=20
  if you are going to reduce power, between&nbsp;MP or RPM, it is better =
to=20
  reduce MP since higher RPM keeps PP lower, at least that was their =
general=20
  conclusion, supported by engine shop experience.</FONT></SPAN></DIV>
  <DIV><SPAN class=3D265045914-12032009><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D265045914-12032009><FONT face=3DArial size=3D2>I =
agree at high=20
  power settings for the reasons cited, &nbsp;but once you get down to =
cruise=20
  power settings, if you are going to reduce power further, reducing rpm =
removes=20
  some friction component while reducing mp does not.&nbsp; therefore =
you should=20
  get better mileage by lowering=20
rpm.</FONT></SPAN></DIV></BLOCKQUOTE></BODY></HTML>

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