REFLECTOR: Fuel Consumption Performance

[David]

I just came back from Oshkosh and I had 14.3gph at 185kts tas.  I cruised at
5500 to 8500.  I have not run my Chevy lean of peak yet since there is
little info on that operation.  With the big engines you probably will not
do any better than 12gph at most altitudes.

Dave Bertram
N350TX
Chevy V-8
 

-------Original Message-------
 
From: Tom Tolton
Date: 8/3/2009 7:01:18 PM
To: reflector at tvbf.org
Subject: REFLECTOR: Fuel Consumption Performance
 
I recently traveled to Oshkosh with a friend who owns a Velocity 173 with
fixed gear and a 200 HP fuel injected Lycoming.  He was able to reduce gas
consumption to 6.2 gallons per hour at 10500 feet and maintain a speed of
about 125 nm/hr using LOP techniques.  
 
I am building a XLFG -5 with constant speed propeller.  I am looking for
what one might expect in minimum gas consumption using LOP techniques at a
density altitude of 10000  feet.  I am considering the Lycoming IO540 260
and 300 HP, as well as, the 310 HP Continental 550N.  It has been suggested
that if I buy one of the more powerful 300 HP engines  I will just be able
to run with less throttle and bring the fuel consumption to a reasonable
level.
 
I would appreciate any comments / experience of the builders and owners with
a similar XLFG configuration.    
 
 
 
Tom Tolton
989-835-5828 (Home)
989-750-8567 (Cell)
 
 
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