REFLECTOR: Fuel Consumption Performance

[Terry Miles]

Al,

 

Here are the numbers for a FF of 8 GPH:

 

Altitude 11,000, OAT +9, IAS 130, TAS 157, FF 8.0, MAP 16.2  power 48%.  

 

Any slower and the deck angle gets to high, and it seem to want to fall off
the step.  I would never fly this slow, and for sure in a head wind.  Like
you called it, after spending all this money it is nuts to save $25 on the
fuel bill.unless you are trying to build flying time, and don't want to
think about what this does to TBO date.

 

Terry

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Al Gietzen
Sent: Wednesday, August 05, 2009 11:34
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: Fuel Consumption Performance

 

Al,

Hey thanks for that.  Can I do anything to help fill in the matrix any
better?  I could get you some 165 TAS numbers on my next long trip.  It
seems like runs at similar altitudes and TAS would make for the easiest
comparisons.  But,  I could fly at whatever altitude or fuel flow, etc you
wanted to know about.  

Terry;

 

I think I've gone as far as going with that - I was just
tabulating/correlating the reported data for easier viewing.  I'd be more
interested in comparison data for alternative engines, although that then
needs to be compared with the certified engines.

 

I think each person should gather some data on their own plane, for their
own purposes; starting with verifying the accuracy of the airspeed and fuel
flow readings.  Then it might be fun to compare some data for the same
models at the same TAS at the same elevation.

 

So if all you folks flying would, whenever convenient, like to post some
data for your M&M and engine type at, say:

Leaned cruise

150 KTAS

9500 ft;

it would be interesting.

 

Best,

Al

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