Today's Message Index:
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1. 05:51 AM - Vapor Lock and E-10 mogas (Andrew Matthaey)
2. 01:50 PM - Re: Vapor Lock and E-10 mogas (Roger Lee)
3. 03:26 PM - Re: Vapor Lock and E-10 mogas (lucien)
4. 08:20 PM - Re: Vapor Lock and E-10 mogas (Roger Lee)
Message 1
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| Subject: | Vapor Lock and E-10 mogas |
I've flown my 582 upwards of 10K MSL many times without a problem...FWIW!
Andrew
KF3 582/C-Box
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| Subject: | Re: Vapor Lock and E-10 mogas |
Hi Arty,
Two trains of thought with two types of people. The people who know it's a very
unlikely scenario (but possible) or the worriers.
The very, very slight possibility of a vapor lock is possible and that's why Rotax
wanted people to install a return fuel line. This helps in keeping any chance
to a minimum. Plus you fly with an exposed engine which remains cooler than
one in a tight hot cowling. The cooler fuel is less likely to lock than really
hot fuel in a metal line. I fly and I know maybe hundreds of guys who fly
with 10% ethanol and up to 12.5K and have never had any issues. I even know a
few that have been to 16K-17K and no issue, but not recommended. The circumstances
would have to be just right, not impossible, but not likely. If it were a
real big problem then all the autos, motorcycles, atv's and any other engine
would be vapor locking just driving up above this elevation in the mountains.
Most gas station's ethanol content seems to be running around 5-7%. Really haven't
found many at the full 10%.
So you fall into the one type who will use it and not worry or you will be afraid
of falling out of the sky and only use 100LL. 100LL shouldn't be used in a
2 stroke if you can avoid it. In all my hours and using 91 oct. at 10% I have
never ever had any issues in a Rotax that was set up properly and I have flown
all over the country.
Of course you didn't even mention phase separation yet? :D
Bottom line I have followed your trips and met you at a fly-in or two. Use your
91 Octane and have a good time.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=235405#235405
Message 3
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| Subject: | Re: Vapor Lock and E-10 mogas |
Roger Lee wrote:
> Hi Arty,
>
> Two trains of thought with two types of people. The people who know it's a very
unlikely scenario (but possible) or the worriers. Rotax has in writing that
5% is OK and I hear through the grapevine that they might be bumping that number
up shortly.
> The very, very slight possibility of a vapor lock is possible and that's why
Rotax wanted people to install a return fuel line. This helps in keeping any chance
to a minimum. Plus you fly with an exposed engine which remains cooler
than one in a tight hot cowling. The cooler fuel is less likely to lock than really
hot fuel in a metal line. I fly and I know maybe hundreds of guys who fly
with 10% ethanol and up to 12.5K and have never had any issues. I even know
a few that have been to 16K-17K and no issue, but not recommended. The circumstances
would have to be just right, not impossible, but not likely. If it were
a real big problem then all the autos, motorcycles, atv's and any other engine
would be vapor locking just driving up above this elevation in the mountains.
Most gas station's ethanol content seems to be running around 5-7%. Really haven't
found many at the full 10%.
>
> So you fall into the one type who will use it and not worry or you will be afraid
of falling out of the sky and only use 100LL. 100LL shouldn't be used in
a 2 stroke if you can avoid it. In all my hours and using 91 oct. at 10% I have
never ever had any issues in a Rotax that was set up properly and I have flown
all over the country.
>
> Of course you didn't even mention phase separation yet? :D
>
> Bottom line I have followed your trips and met you at a fly-in or two. Use your
91 Octane and have a good time.
Actually I'm surprised no one's mentioned this on this list yet but...
Rotax is already telling our distributors that E10 has been approved for the 912
series (I don't know about the 2-strokes tho). If everything else in the fuel
system is compatible with it, the engine is ok with it. They tested it with
something like 20% ethanol even....
Rotax is also raising the TBO for the 912 series to 2000 hours (that according
to Ronnie Smith at SMLA).
Again, I don't know about the 2-strokes. Hopefully when they release the bulletin,
they'll say something about them too.
LS
--------
LS
Titan II SS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=235418#235418
Message 4
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| Subject: | Re: Vapor Lock and E-10 mogas |
Rotax approved 10% ethanol is coming. It's just when will it come in writing. They
are already talking about it in Rotax classes.
Increased TBO hours for the 912 is coming, too. I try not to speak out too far
in advance of something put in writing as I hate it when I get the rug pulled
out from under me at the last minute.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=235467#235467
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