OPPS..... Wasn't there a bulletin from TCM that said to avoid 2300 rpm?




On Aug 6, 2012, at 8:54 AM, Robert R Pastusek <rpastusek@htii.com> wrote:

> Jeff,
> I have found that you can pull the power back even more with minimal loss of speed. I suggest you do some testing down to 29"/2300 RPM and see what you get for cruise. The fuel flow will be at/below 14 GPH at these power settings (LOP and about 55% of rated power).
>
> Bob P
>
> -----Original Message-----
> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of jeffrey liegner
> Sent: Monday, August 06, 2012 7:57 AM
> To: lml@lancaironline.net
> Subject: [LML] Recent LIVP Power Settings (Westbound, FL220, LOP, 2350 RPM)
>
>
> Sent: Sunday, August 5, 2012 9:40:17 PM
> Subject: Recent LIVP Power Settings (Westbound, FL220, LOP, 2350 RPM)
>
>
> Further flight experimenting with slower prop, lower MAP and LOP at lower fuel flows.
>
>
> August 4th, Westbound FL220.
>
>
> MAP 32.0 RPM 2340 FF 16.5 gal/hour (LOP) yields TAS 246.
>
>
> In the past, at a more aggressive setting immediately after take off: MAP 34" RPM 2500 FF 19.0 though out the flight, I would show TAS ~245, roughly the same TAS. Improved prop efficiency?
>
>
> At MAP 31.5" RPM 2350, the FF is 16.2 and the performance is roughly the same.
>
>
> At this cruise setting, with a WOT RPM 2680 climb to the flight levels, the plane's range increases to six hours (rate than 5.5 hours) and still travels 1100nm in five hours on a 110gal full gas load.
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> Comments welcomed.
>
>
> Jeff L
>
>
> Bonus: light winds over the Rockies
>
> http://flightaware.com/live/flight/N334P/history/20120804/1705Z/1D8/S21
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