Mailing List flyrotary@lancaironline.net Message #16817
From: Tom <tomtugan@yahoo.com>
Subject: Re: [FlyRotary] Re: Ellison, the missing piece
Date: Wed, 9 Feb 2005 11:14:35 -0800 (PST)
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Jim & Russ,
Isn't efficiency based on some kind of fuel consumption vs power output ratio.   I keep hearing comments from here and there about the 13b's being a bit more fuel thirsty.   'Those flying are a bit of a gas guzzler', 'the new RX-8 seems to need to hit the gas station more often', etc  But on the power side, I don't hear the claims of increased efficiencies similar to 'I was doing 200knots on 6gph'.
 
But hey, considering everything I'm still really eager to fly with mine.
 
Yes, avgas only, like a Cessna.
 
Tom

Russell Duffy <13brv3@bellsouth.net> wrote:
Isn't there a law of motor performance that says that two motors putting out the same horsepower are consuming the same amount of air&fuel, assuming efficiency differences were not significant?
 
 
I'm guessing that the problem is with that last assumption.  I bet we're operating at an efficiency level that's unimaginable to the folks at Lycoming. 


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