The "GAMI boys" have a phrase for it:

"3 knots for 3 gallons"

Sounds like a good deal to me.  I always fly lean of peak in cruise.

D. Brunner
WOTLOPSOP

-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Lorn
H Olsen
Sent: Friday, June 25, 2010 2:00 PM
To: lml@lancaironline.net
Subject: [LML] LNC2/320 Cruise Speed

06/22/10 I was flying from Detroit to Ft Lauderdale at 11,000. With nothing
else to do, I thought that I would take a few measurements.

Condition LOP Lo ROP Hi
--------- -------- ---------
11,000 IA 2,350RPM 2,700 RPM
13,000 DA 19.3"MP 19.8"MP
30.08 "Hg 6.0 GPH 8.6 GPH
12°C temp 139 kts IAS 152 kts IAS
35°F dewpt? 168 kts TAS 183 kts TAS
1,670 lbs

For a 43% increase in fuel, a 9% increase in airspeed doesn't sound like
much. However, 183 kts airspeed at 13,000 ft density altitude, no matter how
you do it, is great.

The LOP reading at .435 BSFC comes out to HP = 36 * 6 * .435 = 94.0 HP or
94.0 / 160 = 59% power.

Comments appreciated.

Lorn

--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,700 hrs, N31161, Y47, SE Michigan


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