Today's Message Index:
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1. 12:51 AM - Re: Re: 912ULS starts missing at cruise power (Max Cointe)
2. 04:38 AM - Re: 912ULS starts missing at cruise power (Thom Riddle)
3. 07:42 AM - Re: 912ULS starts missing at cruise power (bjones@dmv.com)
Message 1
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| Subject: | Re: 912ULS starts missing at cruise power |
Hi There All,
MoGas with 10% ethanol... I won't use that type of fuel because of chemical impact
on gaskets and filters and plastics and (I heard) vapor condensation possibility
which to me looks like the problem you had. And at the end of the day the
difference in price with non ethanol MoGas is about 0.05 per liter or 1 per
hour of flight.
Cheers,
Max Cointe
Europa F-PMLH TriGear Kit #560
912ULS Airmaster 420 hours
mcointe@free.fr
-----Message d'origine-----
De : owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] De la part de Jason Omelchuck
Envoy : mercredi 25 avril 2012 00:14
: rotaxengines-list@matronics.com
Objet : RotaxEngines-List: Re: 912ULS starts missing at cruise power
Hello,
Yes, I know it was not a standard lapse rate day, we had record heat here in Portland
and there must been some cold air flowing over the top. I have flow at
9500 feet on mo gas on some warm days and never had a problem. But it could
be vapor pressure issues. Why would that change with throttle setting? Rotax
engines have no mixture control. I am going to check the float bows for water
as the symptoms were exactly last time I found water droplets in them. I appreciate
the feedback.
Jason
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=371733#371733
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| Subject: | Re: 912ULS starts missing at cruise power |
It might have been carb ice.
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x32
Truth is what stands the test of experience.
- Albert Einstein
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=371766#371766
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| Subject: | Re: 912ULS starts missing at cruise power |
Someone with technical expertise might offer comments on the risk of phase
seperation of ethanol and water from mo gas with a big decrease in temp at
altitude.
When I have experienced phase seperation, the full ten percent (roughly)
of the fuel that is ethanol & water settled to the bottom of the tanks and
the engines would not run on the settleout. So the idea of a little bit of
settleout does not fit my experience.
Love to hear from someone in the fuel science industry.
My prevetive measure is to use ethanol free auto gas from marina's and by
checking puregas.com when traveling to find gas stations with ethanol free
gas.
BJ
Kitfox IV 912
old fiberglass tanks so can not use gasahol
> <jason@trek-tech.com>
>
> I though I might throw this out for the group to ponder. I was out flying
> yesterday and I had just leveled off at 8500 feet when the engine started
> to miss. I reduced power (to 5000) and the miss went away. Increase
> power again and it was back. I pulled the power back and went the long
> safe way around the mountains instead of over as I had intended. When I
> got closer to home, I could run the engine at extended high power and no
> miss. The miss is just like when I discovered some water in the float
> bowls. My theory is that when I climbed to 8500ft, the temperature was a
> full 40 degrees less than when I took off and that caused water to
> condense out of the fuel. When I got close to home, the temperature was
> 80 degrees and the water went back in solution and the problem went away.
> I am using premium mo gas with 10 percent ethanol.
>
> Jason
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=371723#371723
>
>
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