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Date: Wed, 07 Sep 2005 09:27:59 -0400
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Alternative fuel
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Ed Anderson wrote:

> Must be Swedish Magic {:>).  Energy content is energy content - takes 
> energy to make power.  So unless the references I got about the 
> relative energy content of ethanol vs gasoline were flawed, I'll stand 
> by my assertion {:>).  Besides they don't give you any specs about the 
> parameters underwhich they make the power.  I can take an engine that 
> makes 180 HP on ethanol and have it only make 140 HP on gasoline - if 
> you simply take your foot off the throttle {:>)
>  
> Trouble maker {:>)
>  
> Ed


An engine tuned to run ethanol will be a dog with gasoline.  An engine 
tuned for gasoline will perform poorly with ethanol. An engine set up to 
run premium won't like regular.  An engine set up for regular will run 
badly on premium.  You can convert a class 8 diesel to run propane, but 
you have to change a lot of things.

Racers burning ethanol or nitro started doing it because it was easier 
to tune the engine at the ridiculous RPMs they were running.  Ethanol 
and nitro burn faster, so the fuel has time to burn before the piston is 
coming back up to push the exhaust gas out of the cylinder.  Notice that 
none of the NASCAR guys are burning ethanol, even with all the millions 
that those guys pour into R&D.  It's because fuel stops actually count 
as race time.

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