Today's Message Index:
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1. 04:59 AM - Re: ethanol (Joe and Joan Kimbell)
2. 06:05 AM - Re: Cracks in Crankcase (Catz631@aol.com)
Message 1
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GENTLEMEN: Thank you for your input. I have found a source for 90 oct. et
hanol free fuel for about 50 cents a gal. over pump price. sounds like a g
ood deal to me. After following all of the excellent suggestions. I am sw
itching to the ethanol free fuel. Wish it was available for everyone. T
hanks again=2C Joe
From: noelloveys@yahoo.ca
Subject: RE: RotaxEngines-List: ethanol
If you really=2C really have to fly on ethanol fuel then you have already b
roken the first cardinal rule. Never leave fuel in your plane for an exten
ded period of time. If you have high humidity=2C as you said=2C it will a
bsorb some of the moisture and when that happens it=2C not only gets closer
to a phase separation but becomes very corrosive.... It may eat your tank
s if they are anything but stainless steel. It will probably start to eat
your fuel system including the carb body and the fuel lines. Best not to l
eave it in the plane and only fly on fresh fuel. BTW you will know when yo
u have a phase separation happening... you will get something just over 10
% of the quantity of fuel in your tank showing up as water. So if you have
left say 15 gal of fuel in your plane then if it separates you will get 1.
5 gallons of water/ethanol solution (mostly water) hitting your carb or inj
ectors. A little good news is if you are using a paper filter it will try
to block the water from passing... unfortunately there won=92t be anything
else but water to pass. The milky substance you did find is probably some
thing the ethanol started to eat.
The second point is as Barry mentioned remove the ethanol form your fuel by
adding enough water to cause a phase separation. Then siphon the clear et
hanol free gas off the top of the water ethanol solution that will form on
the bottom of the container. Be careful though=2C to let the gas sit for a
bout twenty minutes so all the water can settle out before siphoning the ga
s. And always use a good chamois or felt to strain your gas... either of
those products will pass gas but not water. If you remove the ethanol from
your fuel then it won=92t hurt to leave the gas in your plane between flig
hts for periods of up to I guess a month or so.
Noel
From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengin
es-list-server@matronics.com] On Behalf Of FLYaDIVE
Sent: February 7=2C 2011 2:29 PM
Subject: Re: RotaxEngines-List: ethanol
Joe:
There are a few things that would cause your fuel to go cloudy:
Contamination in the tank.
Hygroscopic action of the alcohol
Temperature (low) causing the water to freeze
Being that you found only 1/2 ounce I would also consider:
The drain plugs as being contaminated due to oxidation
How clean was the inspection tube that you were using
When you say 'separation'=2C are you referring to the water separating out
from the fuel due to saturation? If yes=2C then YES you could be seeing th
e water above what the alcohol would hold in suspension.
A 1/2 ounce... I would not worry about. But why use gas with ethanol - Do
the separation procedure that has been discussed here on line and you will
reduce the chances of water.
Barry
On Mon=2C Feb 7=2C 2011 at 10:10 AM=2C Joe and Joan Kimbell <jnjkimbell@hot
mail.com> wrote:
Appreciate some info concerning fuel seperation. I have CH701 with the 100
hp riotax. I live in a high humedity area and have not been flying much la
tely. I use 10% ethanol fuel and last time I started to fly (fuel had bee
n in A/C over a month) and checked the lowest drain=2C I found cloudy fuel
=2C not water=2C but did not lood good. I continued to drain fuel until it
was clear=2C probably a half an ounce. Was this cloudy fuel on the point o
f seperation? I did go ahead and fly with no problems=2C but after thinkin
g about it=2C what would the list's ideas be. Very glad it kept running=2C
though an both tanks the fuel seemed to come out of only one tank. No ext
ernal fuel pump. Gravity feed.
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Message 2
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| Subject: | Re: Cracks in Crankcase |
>I believe the MINIMUM
required on wide open throttle is 5400 rpm.<
Ron,
If you check the service bulletin you will see the minimum is 5200.
Dick Maddux
Milton,Fl
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