Mailing List flyrotary@lancaironline.net Message #52754
From: Mark Steitle <msteitle@gmail.com>
Subject: Re: [FlyRotary] Re: EM2 Numbers
Date: Mon, 1 Nov 2010 18:44:42 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Al,

No, we sure didn't.  In fact, I like going faster than my wallet can keep up.  

In doing some searching for LDmax for the Lancair ES, I read the statement that best economy would be the same as best glide.  That makes sense to me.  Probably close enough for our purposes.  What say you?  

Mark

On Mon, Nov 1, 2010 at 5:53 PM, Al Gietzen <ALVentures@cox.net> wrote:

Where does one find the "most efficient operationg point" for a particular airframe?  Is this the same as LDmax?

 

Mark;

 

The EM2 reads out MPG. Most efficient operation would be where you get the highest MPG. So go fly at 100F, or so; lean of peak EGT and take some data of MPG and speed.  You’ll find a max MPG point that is slower than you’ll typically want to fly.  I think for my Velocity it was a fairly broad peak around 125 (I don’t even remember now if that was MPH or Kts; because I never fly there in level flight).  We didn’t build sleek airplanes with more powerful engines to go the speed of a Skyhawk – did we?

 

Al


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