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Date: Wed, 9 Feb 2005 11:14:35 -0800 (PST)
From: Tom <tomtugan@yahoo.com>
Subject: Re: [FlyRotary] Re: Ellison, the missing piece
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-722014@logan.com>
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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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<DIV>Jim &amp; Russ,</DIV>
<DIV>Isn't efficiency based on some kind of fuel consumption vs power output ratio.&nbsp;&nbsp; I keep hearing comments from here and there about the 13b's being a bit more fuel thirsty.&nbsp;&nbsp; 'Those flying are a bit of a gas guzzler', 'the new RX-8 seems to need to hit the gas station more often', etc&nbsp; But on the power side, I don't hear the claims of&nbsp;increased efficiencies&nbsp;similar to&nbsp;'I was doing 200knots on 6gph'. </DIV>
<DIV>&nbsp;</DIV>
<DIV>But hey, considering everything I'm still really eager to fly with mine. </DIV>
<DIV>&nbsp;</DIV>
<DIV>Yes, avgas only, like a Cessna. </DIV>
<DIV>&nbsp;</DIV>
<DIV>Tom<BR><BR><B><I>Russell Duffy &lt;13brv3@bellsouth.net&gt;</I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<META content="MSHTML 6.00.2900.2523" name=GENERATOR>
<DIV>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&amp;fuel, assuming efficiency differences were not significant?</DIV>
<DIV>&nbsp;</DIV>
<DIV><SPAN class=156325616-09022005><FONT face=Arial color=#ff0000></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=156325616-09022005><FONT face=Arial color=#ff0000>I'm&nbsp;guessing that the problem is with that last assumption.&nbsp; I bet we're operating at an efficiency level that's unimaginable to the folks at Lycoming.&nbsp; </FONT></SPAN></DIV></BLOCKQUOTE><p>
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