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Date: Sun, 15 Mar 2009 18:53:14 -0400
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Subject: Re: [LML] Re: LOP vs ROP Climb: Time and Fuel Burn (LIVP)
From: "John Schroeder" <jschroeder@perigee.net>
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Art -

They teach, in the APS Seminar, Wide Open Throttle (WOT) all the time and  
vary the mixture in the LOP range and rpm for speed. They are having a  
live seminar in early May in Ada, OK if anyone is interested. I highly  
recommend it. IMHO, it is the most cost-effective insurance one can have  
with respect to the care and running of your engine. You can also take it  
on line. I have not done that one. George, Walter and John - all have  
taken IO & TSIO 550's to factory recommended overhaul times and sometimes  
beyond; with little or no cylinder problems. I may not be completely  
accurate on this last statement, but close. Another point is that the  
turbo temperature is a key indicator for setting and running LOP. I did  
not have a turbo, so I did not pay close attention to this part of the  
seminar.

My apologies to Walter, George and John if I have mis-stated something  
here. Just trying to get folks to your seminar. :-))

John Schroeder


On Sat, 14 Mar 2009 07:32:47 -0400, Art Bertolina  
<artbertolina@earthlink.net> wrote:

> Re: [LML] LOP vs ROP Climb: Time and Fuel Burn (LIVP)would like to hear  
> what George or Walter could add to
> this conversation. It was my understanding that higher RPM
> is better for the engine, as long as the prop is not driving
> engine
> Art
>   ----- Original Message -----
>   From: Colyn Case at earthlink
>   To: lml@lancaironline.net
>   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.