Mailing List lml@lancaironline.net Message #56774
From: Terrence O'Neill <troneill@charter.net>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] efficiency
Date: Mon, 22 Nov 2010 18:05:08 -0500
To: <lml@lancaironline.net>
Zowie!  What power settings did you use for that, Bill?
You had to have matching EGTs... how did you do that?

Terrence
L235/320 N211AL


On Nov 21, 2010, at 9:17 PM, Bill Hannahan wrote:

Please excuse a little bragging.

 

Steve Alderman and I flew my Lancair 360 to the Copperstate fly-in SW of Phoenix and competed in the Fuelventure efficiency competition.

 

The planes are weighed with fuel onboard. Payload [pilot passenger and baggage, up to 200 lb per seat] is weighed separately.

 

The planes fly around a 383 mile course. Timing is from liftoff to overflight of midfield on return from the course. The planes and payload are weighed on return to determine the mass of fuel burned.

 

The score is calculated using the latest CAFÉ formula;

 

Café score equals payload raised to the 0.7 power, times, miles per gallon, times, average speed in mph raised to the 1.7 power.

 

This formula puts a strong emphasis on speed, reflecting reality in the evaluation of cross country aircraft.

 

Steve is an experienced CAFÉ racer having obtained a remarkably high level of performance from his KR2 under an earlier CAFE formula. He even outperformed Lance Neibauer flying the first Lancair 235.

 

http://cafefoundation.org/v2/pdf_cafe_cafe400/86CAFE400.pdf

 

Steve let me know when I was a degree or two off course and kept track of our ground speed and true airspeed.

 

Our average speed around the course was 188.9 mph at 36.58 MPG, [5.16 GPH]

 

Our CAFÉ score was 1,223,333.2   second to Klaus Savier’s highly developed VariEze.

 

http://www.fuelventure.org/documents/2010_results.html

 

To my knowledge it is the highest CAFÉ score by a Lancair using the latest formula.

 

The engine is a stock Lycoming 360 A1A, with 8.5:1 compression ratio, two magnetos and a carburetor, swinging a Hartzell prop. Empty weight is 1,015 pounds.

 

Steve is building a Lancair 360 of his own, and plans to kick my a## next year.

 

It is good fun, a test of planning and flying skills, and a great way to meet a group of friendly, interesting, like minded people. I recommend that everybody give it a try.


Regards,
Bill Hannahan


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