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Date: Wed, 08 Aug 2012 07:55:59 -0400
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From: Robert R Pastusek <rpastusek@htii.com>
Subject: RE: [LML] Re: Recent LIVP Power Settings (Westbound, FL220, LOP,
 2350 RPM)
Thread-Topic: [LML] Re: Recent LIVP Power Settings (Westbound, FL220, LOP,
 2350 RPM)
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I believe the bulletin recommended against extended operation below 2300 RP=
M because of some unexplained problems with the harmonic balancers getting =
out of sync and damaging the engine?

Others with better info?

Bob

-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Bill=
 Hogarty
Sent: Tuesday, August 07, 2012 7:46 AM
To: lml@lancaironline.net
Subject: [LML] Re: Recent LIVP Power Settings (Westbound, FL220, LOP, 2350 =
RPM)

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 se=
ttings (LOP and about 55% of rated power).
>=20
> Bob P
>=20
> -----Original Message-----
> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of je=
ffrey liegner
> Sent: Monday, August 06, 2012 7:57 AM
> To: lml@lancaironline.net
> Subject: [LML] Recent LIVP Power Settings (Westbound, FL220, LOP, 2350 RP=
M)
>=20
>=20
> Sent: Sunday, August 5, 2012 9:40:17 PM
> Subject: Recent LIVP Power Settings (Westbound, FL220, LOP, 2350 RPM)
>=20
>=20
> Further flight experimenting with slower prop, lower MAP and LOP at lower=
 fuel flows.=20
>=20
>=20
> August 4th, Westbound FL220.=20
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> MAP 32.0 RPM 2340 FF 16.5 gal/hour (LOP) yields TAS 246.=20
>=20
>=20
> 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?=20
>=20
>=20
> At MAP 31.5" RPM 2350, the FF is 16.2 and the performance is roughly the =
same.=20
>=20
>=20
> At this cruise setting, with a WOT RPM 2680 climb to the flight levels, t=
he plane's range increases to six hours (rate than 5.5 hours) and still tra=
vels 1100nm in five hours on a 110gal full gas load.=20
>=20
>=20
> Comments welcomed.=20
>=20
>=20
> Jeff L=20
>=20
>=20
> Bonus: light winds over the Rockies=20
>=20
> http://flightaware.com/live/flight/N334P/history/20120804/1705Z/1D8/S21=20
>=20
>=20
>=20
>=20
>=20
>=20
>=20
>=20
>=20
>=20
> --
> For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.ht=
ml

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