The Murphy Builders Site

Ralph Baker wrote:

SNIP
Rotax does approve 5% ethanol in the fuel and, while not official,
Lockwood stated they have had no negative results from 10% ethanol.
Of course, that still leaves the suitability of the fuel system in
the airframe.
Ralph Baker

And of course separation of the ethanol is also a major concern,
especially in humid areas, cold areas, and for aircraft that are parked
for any period of time.
Ken



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Does anyone know wether or not the Proseal used to seal the wing tanks is impervious to Ethanol?

Keith R661

Ken <klehman@albedo.net> wrote:
Ralph Baker wrote:

SNIP
Rotax does approve 5% ethanol in the fuel and, while not official,
Lockwood stated they have had no negative results from 10% ethanol.
Of course, that still leaves the suitability of the fuel system in
the airframe.
Ralph Baker

And of course separation of the ethanol is also a major concern,
especially in humid areas, cold areas, and for aircraft that are parked
for any period of time.
Ken



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All reports say good up to 10% but probably expect quick failure if any
ethanol separates out and sits in tank bottom. Of course separated
ethanol will also fail most engines...
Ken

Keith Leitch wrote:

Does anyone know wether or not the Proseal used to seal the wing tanks is impervious to Ethanol?

Keith R661

Ken <klehman@albedo.net> wrote:
Ralph Baker wrote:

SNIP
Rotax does approve 5% ethanol in the fuel and, while not official,
Lockwood stated they have had no negative results from 10% ethanol.
Of course, that still leaves the suitability of the fuel system in
the airframe.
Ralph Baker

And of course separation of the ethanol is also a major concern,
especially in humid areas, cold areas, and for aircraft that are parked
for any period of time.
Ken

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Here is a set of articles about mogas and ethanol that I thought were good
reading.
http://www.aviationfuel.org/autogas/articles/

Here is a link to an RV group that has been flying for some time on 100%
ethanol.
http://www.ethanolairshows.com/

It seems that the greatest challenge with ethanol is the fuel system
components.

As for mogas, it seemed to work well in my low compression O-320. Saved lots
of money, that's for sure. It still received the occasional fill-up(s) of
avgas on my trips and in the winter, so I guess the valves and seats still
got their share of lead lubrication. With my new engine (higher
compression), I intend to use 100LL to start off, but later on would like to
use some premium mogas with it as well.

But I am certainly no proponent of ethanol, and fortunately in my area, it
is still easily avoided.

Walter

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Ken
Sent: April 24, 2008 6:15 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Rotax school/ethanol

Ralph Baker wrote:

SNIP
Rotax does approve 5% ethanol in the fuel and, while not official,
Lockwood stated they have had no negative results from 10% ethanol.
Of course, that still leaves the suitability of the fuel system in
the airframe.
Ralph Baker

And of course separation of the ethanol is also a major concern,
especially in humid areas, cold areas, and for aircraft that are parked
for any period of time.
Ken



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