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Engine Fuels

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marinegunner(at)gmail.com
Guest

Posted: Mon May 08, 2006 10:05 am Post subject: Engine Fuels

What will be interesting to me is learning about how various airplane

engines will run on gasoline with some or a large amount of ethanol - such

as used in Brazil. I am convinced that this country will move in that

direction if we really want to be free of oil dependence on countries that

do not seem to like us or what we are about. Specifically, Rotax's;

Continental A65's; Continental 200's; VW and other conversions. How might

this affect builders, etc.

--

Semper Fi,

Steven R. Hulland

CH 701/601, Amado, AZ



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frank.hinde(at)hp.com
Guest

Posted: Mon May 08, 2006 10:24 am Post subject: Engine Fuels

This is a group that is running an IO360 (I believe) on E85...I think it

burns a hell of a lot of fuel (as you would expect cus there is much

less enegery stored in a gallon of ethanol compared to gas) so the range

has to be considerably shortened.



The way I justify it is to run a small car and then I know my neighbours

in there SUVs are using more fuel than I am...



Frank



Do not archive



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pmoore505(at)msn.com
Guest

Posted: Tue May 09, 2006 8:39 am Post subject: Engine Fuels

Making the engines run on alcohol is no trick. But most of the seals and 

rubber parts in the typical engine are not compatible so would have to be 

changed - not sure how because I don't think you can run down to the nearest 

NAPA store and buy ethanol compatible stuff for your <insert your engine 

type here>.



It does take almost twice as much alcohol (volume) to make the same power so 

you'd be burning twice the gph as with gasoline. One must open up the main 

jets to get enough into the cylinders. Even if the fuel half as expensive 

it's not even a break even deal considering the cost of modifying the engine 

to be compatible.



And last but not least, the vapor pressure of alcohol is way less than 

gasoline so the well-worn warning of vapor lock in the lines between the 

tanks and the engine is even more likely with ethanol than with gasoline. 

Not to mention the ability of alcohol to absorb water....(hummm, that might 

be a good thing..?)



Paul

XL - O200



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