Today's Message Index:
----------------------
1. 05:12 AM - Re: Low oil temps on 912ULSLow oil temps on 912ULS (Catz631@aol.com)
2. 07:44 AM - Re: EGT Temps (rampil)
3. 07:59 AM - Re: Low oil temps on 912ULS (rampil)
4. 08:01 AM - Re: Low oil temps on 912ULS (Goodone)
5. 01:10 PM - Re: Re: Low oil temps on 912ULS (Graham Singleton)
6. 02:49 PM - Re: Low oil temps on 912ULS (lucien)
7. 03:29 PM - Re: Low oil temps on 912ULS (Noel)
8. 05:24 PM - Re: Re: Low oil temps on 912ULS (Noel)
9. 07:28 PM - Re: Re: Low oil temps on 912ULS (Matt Tucciarone)
Message 1
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| Subject: | Re: Low oil temps on 912ULSLow oil temps on 912ULS |
Lowell Fitt at _highwingllc.com_ (highwingllc.com) makes a very nice set
of cockpit controllable shutters for both the oil cooler and radiator. I
have them on my Kitfox and they work well.
Dick Maddux
Kitfox 4-120
0
Rotax 912 UL
Milton,Fl
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Hi Ron,
I was just pointing out that most Rotax drivers are probably better off
without EGTs than they would be with. I say that as a quant who has
4 EGTs, 6 CHTs (two duplicates to compare plug rings with Rotax probes)
and coolant and carb temps.
Ira
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=245887#245887
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| Subject: | Re: Low oil temps on 912ULS |
Hi Matt,
Actually the temp needs to touch and exceed 212F for some time after
each flight. Usually on the ground after engine off. The reason is that
water is a product of combustion of gasoline and if left in the oil will
hasten corrosion. It needs to boil out. Remember the boiling point of
water at the normal operation oil pressure is much higher than the safe
temp of the rotax alloy in the heads, so the boiling usually, occurs when
the engine stops.
At 4 atm (60 psi) the boiling point of pure water is about 300C!
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=245891#245891
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| Subject: | Re: Low oil temps on 912ULS |
My engine is a 912UL on a Skyranger and the oil temp in it also runs cool. I normally
cover my oil radiator with aluminum tape and only remove it when the temperatures
here in Maryland get really hot in the summer. During the winter I
add a layer of insulation to the tape.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=245893#245893
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| Subject: | Re: Low oil temps on 912ULS |
rampil wrote:
> Remember the boiling point of
> water at the normal operation oil pressure is much higher than the safe
> temp of the rotax alloy in the heads, so the boiling usually, occurs when
> the engine stops.
>
> At 4 atm (60 psi) the boiling point of pure water is about 300C!
>
> --------
> Ira N224XS
Ira
I suspect you taught a lot of us something we had not thought through.
Very good point.
Message 6
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| Subject: | Re: Low oil temps on 912ULS |
grahamsingleton(at)btinte wrote:
> rampil wrote:
>
> > Remember the boiling point of
> > water at the normal operation oil pressure is much higher than the safe
> > temp of the rotax alloy in the heads, so the boiling usually, occurs when
> > the engine stops.
> >
> > At 4 atm (60 psi) the boiling point of pure water is about 300C!
> >
> > --------
> > Ira N224XS
> > Ira
> >
>
> I suspect you taught a lot of us something we had not thought through.
> Very good point.
Well remember water evaporates readily at lower temperatures than the boiling point.
You don't have to boil it to "burn" it off.
You pretty much only have to get the engine and oil hot enough to actually get
it all evaporated before it gets too cold again to do so. Whether that's 212F,
tho, I dunno. I look at the oil cap after the engine cools down, there's usually
a little condensation on it if I didn't run the engine long enough to get
it hot enough to burn off all the moisture.
As for the oil temp, I too have an oil thermostat installed on mine and it helps
keep the temps up quite a bit. There are times in the winter tho where even
that won't allow it to get to 180+. I"ve landed and put it away a few times in
the very cold weather because I still couldn't get the oil temps over 160 or
something like that without just really running the motor too hard.
LS
--------
LS
Titan II SS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=245960#245960
Message 7
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| Subject: | Low oil temps on 912ULS |
Sound to me like a set of Lowell's shutters would be right up your alley.
Open then in the climb and close them to cruise in warmer weather.
Noel
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Les
Goldner
Sent: 28 May 2009 08:01 PM
Subject: RotaxEngines-List: Low oil temps on 912ULS
<lgold@quantum-associates.com>
I fly a Zenith CH701 with a 912 ULS engine and my oil temps are running low.
Rotax says the operating temps should be between 190 and 230-degrees F. My
normal temps with 60-degree outside air run about 130-degrees at about
4800-RPM. I only get in the "normal" range when running near full RPM, about
5250 with my prop setting. I mostly use 91 octane mogas and CPS's
semi-synthetic AV-9 motor oil (which is supposed to be designed especially
for the 912).
Should I be concerned that the oil temps run below the normal range?
Les
Message 8
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| Subject: | Re: Low oil temps on 912ULS |
Remember your lubrication system isn't sealed and under pressure like the
cooling system.
Noel
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of lucien
Sent: 29 May 2009 07:19 PM
Subject: RotaxEngines-List: Re: Low oil temps on 912ULS
grahamsingleton(at)btinte wrote:
> rampil wrote:
>
> > Remember the boiling point of
> > water at the normal operation oil pressure is much higher than the safe
> > temp of the rotax alloy in the heads, so the boiling usually, occurs
when
> > the engine stops.
> >
> > At 4 atm (60 psi) the boiling point of pure water is about 300C!
> >
> > --------
> > Ira N224XS
> > Ira
> >
>
> I suspect you taught a lot of us something we had not thought through.
> Very good point.
Well remember water evaporates readily at lower temperatures than the
boiling point. You don't have to boil it to "burn" it off.
You pretty much only have to get the engine and oil hot enough to actually
get it all evaporated before it gets too cold again to do so. Whether that's
212F, tho, I dunno. I look at the oil cap after the engine cools down,
there's usually a little condensation on it if I didn't run the engine long
enough to get it hot enough to burn off all the moisture.
As for the oil temp, I too have an oil thermostat installed on mine and it
helps keep the temps up quite a bit. There are times in the winter tho where
even that won't allow it to get to 180+. I"ve landed and put it away a few
times in the very cold weather because I still couldn't get the oil temps
over 160 or something like that without just really running the motor too
hard.
LS
--------
LS
Titan II SS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=245960#245960
Message 9
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| Subject: | Re: Low oil temps on 912ULS |
I have never heard that. I was told that 190 would burn out the water in the
engine that would condensate in it. And it would make sense that 190 number
was correct because my thermostat keeps the oil between 190 and 200.
Again I have never heard that it has to be about 212.
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of rampil
Sent: Friday, May 29, 2009 10:59 AM
Subject: RotaxEngines-List: Re: Low oil temps on 912ULS
Hi Matt,
Actually the temp needs to touch and exceed 212F for some time after
each flight. Usually on the ground after engine off. The reason is that
water is a product of combustion of gasoline and if left in the oil will
hasten corrosion. It needs to boil out. Remember the boiling point of
water at the normal operation oil pressure is much higher than the safe
temp of the rotax alloy in the heads, so the boiling usually, occurs when
the engine stops.
At 4 atm (60 psi) the boiling point of pure water is about 300C!
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=245891#245891
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