Hello all,
Our gasol in Brazil has about 25% ethanol for the premium blend, it is
measured as 103 RON which is roughly equivalent to Avgas 100LL. Indeed we
run Rotaxes (some small Lycs and Conts also) using it, the engines
run cleaner and cooler. However, composites fuel tanks must be watched for.
Usually the carbs must be adjusted for a richer mixture to compensate for
the ethanol content. Some use zinc based oil additives.
The EMBRAER in Brazil manufactures the Ipanema Ag plane which is flex fuel
(AvGas or Hydrated Ethanol - 85-90% ethanol, 10% water). Very
successful plane here, about 1400 manufactured and in use. The engine is
the old fashioned Lyc IO540. And yes Lycoming has teamed up with Embraer to
develop ethanol based aviation engines. Endurance is reduced about 30%
since ethanol has a lower energy density than Avgas, but it is
environmentally cleaner.
https://agricultural.embraer.com/br/pt/ipanema-203
Wlad
Em qui., 18 de mar. de 2021 =C3-s 19:52, Steve Ivell <
SteveIvell@pestproof.co.uk> escreveu:
> Hi Jonathan
>
> The Rotax engine is fine with ethanol, as you mention in Brazil. The
> engine is designed for mogas and really doesn't like Avgas.
> My feeling is that the LAA are living in the past and if it's not Avgas
> it's no good!! Well it's time to smell the coffee and get used to the her
e
> and now. 10% ethanol is coming and I'll be using it.
> It might mean changing the rubber more often but that's still much more
> affordable than having to use Avgas.
> Obviously just my humble opinion.
>
> Cheers
> Steve
> GSTES
> XS Trigear 912s..... nearly finished!!
>
> ------------------------------
> *From:* owner-europa-list-server@matronics.com <
> owner-europa-list-server@matronics.com> on behalf of JonathanMilbank <
> jdmilbank@yahoo.co.uk>
> *Sent:* Thursday, 18 March 2021, 21:35
> *To:* europa-list@matronics.com
> *Subject:* Europa-List: Ethanol in fuel. What about Brazil?
>
> jdmilbank@yahoo.co.uk>
>
> We in the UK are faced with the prospect of ethanol content in fuel being
> raised in September from 5% to 10%. About 10 or so years ago (or was it
> longer?) this whole subject got debated to death, with the LAA Light
> Aircraft Association taking the position that we should always check each
> fuel batch for ethanol before pouring it into our fuel tanks. The test
> using a glass test tube with about 1" of water in the bottom, noting its
> level, then adding about 4 X as much fuel before shaking well and allowin
g
> to settle to see if the water level had apparently risen, was not
> particularly accurate and I never saw the water level rise.
>
> The LAA's understandable position then was "If you find evidence of
> ethanol in fuel, then don't use it!" This position is very unlikely to
> change, which will mean that Rotax engines should either use avgas or UL9
1.
> For those of us living in god-forsaken northern latitudes, neither of the
se
> fuels are available and it would be economically prohibitive to either
> import them to our remote airfields or to fly to the nearest large airpor
t
> to refuel, while simultaneously incurring landing fees and handling charg
es
> of =C3=82=C2=A3200!
>
> Obviously (at least to me) Europas should cope with 10% ethanol in fuel,
> because I believe that at least one, maybe more Europas in Brazil were
> using fuel with ethanol having well in ecxess of 20%. Seemingly our
> "plastic" fuel tanks, automotive fuel lines and carburettors are unfased
by
> ethanol.
>
> Please correct me if I'm wrong about Brazil and let me know whether
> ethanol is to blame for any fuel tank failures in Europas. Thank you.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=501000#501000
>
>
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