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1. 01:40 PM - Re: 912ULS starts missing at cruise power (Phil)
2. 02:44 PM - Re: 912ULS starts missing at cruise power (chris davis)
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| Subject: | Re: 912ULS starts missing at cruise power |
You can test for ethanol laden gas (if you should ever doubt the source you
bought from) by adding 10% water to a small, tall, thin container of gas,
shaking, and watching to see if the 10% mark increases.
If the level of the water (at the bottom) stays the same, you have ethanol-
free gas. If it increases to, say, roughly 15%, that means you have 10% alc
ohol in the gas - I read that in a test like this, only half the ethanol wi
ll "disolved down into the water; the other 5% will stay suspended in the g
as.
Phil H
FF11-4-00076; still building
CRE mz201 626cc
maiden voyage hopefully the first week of May.
--- On Wed, 4/25/12, bjones@dmv.com <bjones@dmv.com> wrote:
From: bjones@dmv.com <bjones@dmv.com>
Subject: Re: RotaxEngines-List: 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 fly
ing
> 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 wa
s
> 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
>
>
le, List Admin.
Message 2
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| Subject: | Re: 912ULS starts missing at cruise power |
Phil Your building is going well if you are going to fly the first-week o
f may! Good luck hope that 201 is a smooth strong runner=0AChris Davis=0AKX
P 503 492 hrs=0AGlider Pilot=0ADisabled from crash building Firefly=0A=0A
=0A________________________________=0AFrom: Phil <phactor9@yahoo.com>=0ATo:
rotaxengines-list@matronics.com =0ASent: Thursday, April 26, 2012 4:37 PM
=0ASubject: Re: RotaxEngines-List: 912ULS starts missing at cruise power=0A
=0AYou can test for ethanol laden gas (if you should ever doubt the source
you bought from) by adding 10% water to a small, tall, thin container of ga
s, shaking, and watching to see if the 10% mark increases.=0A=0AIf the leve
l of the water (at the bottom) stays the same, you have ethanol-free gas. I
f it increases to, say, roughly 15%, that means you have 10% alcohol in the
gas - I read that in a test like this, only half the ethanol will "disolve
d down into the water; the other 5% will stay suspended in the gas.=0A=0APh
il H=0AFF11-4-00076; still building=0ACRE mz201 626cc=0Amaiden voyage hopef
ully the first week of May.=0A=0A=0A=0A--- On Wed, 4/25/12, bjones@dmv.com
<bjones@dmv.com> wrote:=0A=0A=0A>From: bjones@dmv.com <bjones@dmv.com>=0A>S
ubject: Re: RotaxEngines-List: 912ULS starts missing at cruise power=0A>To:
rotaxengines-list@matronics.com=0A>Date: Wednesday, April 25, 2012, 10:42
e with technical expertise might offer comments on the risk of phaseseperat
ion of ethanol and water from mo gas with a big decrease in temp ataltitude
.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 andthe
engines would not run on the settleout. So the idea of a little bit ofsett
leout does not fit my experience.Love to hear from someone in the fuel scie
nce industry.My prevetive measure is to use ethanol free auto gas from mari
na's and bychecking puregas.com when traveling to find gas stations with et
hanol freegas.BJKitfox IV 912old fiberglass tanks so can not use gasahol> -
.com>>> I though I might throw this out for the group to ponder.- I was o
ut flying> yesterday and I had just leveled off at 8500 feet when the engin
e
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 pow
er and no> miss.- The miss is just like when I discovered some water in t
he float> bowls.- My theory is that when I climbed to 8500ft, the tempera
ture was a> full 40 degrees less than- when I took off and that caused wa
ter to> condense out of the fuel.- When I got close to home, the temperat
ure was> 80 degrees and the water went back in solution and the problem wen
t away.> I am using premium mo gas with 10 percent ethanol.>> Jason>>>>> Re
ad this topic online here:>> http://forums.matronics.com/viewtopic.php?p=
371723#371723>>>>>>> http://www.matronics.com/Navigator?RotaxEngines-Lis-
----> http://www.matronics.c==============
======
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