Today's Message Index:
----------------------
1. 10:19 AM - Need Rotax 912S Help To Get The 7-Oh-Fun Back Home (John Marzulli)
2. 10:26 AM - Auto-response (Viorel Nichols)
3. 11:03 AM - Re: Need Rotax 912S Help To Get The 7-Oh-Fun Back Home (Ken Lyons)
4. 01:19 PM - Re: Need Rotax 912S Help To Get The 7-Oh-Fun Back Home (Thomas Longo)
Message 1
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| Subject: | Need Rotax 912S Help To Get The 7-Oh-Fun Back Home |
I need some Rotax advise as my plane is stranded at another airport.
The coolant overflow bottle failed in flight. The first sign was some red
fluid in the cockpit a few minutes after take off. At first I thought it
was brake fluid.
I noted the EGTs were high, but the CHTs were in range, and the oil temps
were slightly high, but not in "the red zone"
A minute later I started smelling something in the cockpit and turned back
to the field at reduced power.
A few minutes later I lost one of the CHT probes, but the other was reading
fine. A few minutes after that I lost the other CHT probe. Oil temps at
this point were still just into the yellow zone.
On the ground I pulled the cowling and found the coolant bottle had melted
a hole at the point closest to the oil reservoir. The shrink wrap that
holds the CHTS in place had melted and the CHT connectors had come out of
position.
I was able to get some more DexCool and field replaced the coolant bottle
with some attempts to heat shield it.
Runup and pre-flight were normal. The engine made normal power on take off.
After climbing above the airport I noticed the CHTs were still high.
The engine was also only making 5100RPM in level flight with full throttle.
I normally can exceed 5500 with my prop pitch.
I landed back and found a hangar to tuck it back in at.
So now the question is, what should I be looking for? The engine ran
smooth. Shut down was brisk as always. Based on this I do not think one of
the pistons is damaged.
The current plan is to compression test it, check the plugs and pull the
oil filter to look for metal.
Does anyone else have any ideas?
John Marzulli
http://MarzulliPhoto.net/
http://701Builder.blogspot.com/
Message 2
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Away on holiday from the 22 December 2012 till 29 January 2013
Wishing you a happy festive season .
Merry Christmas and a Happy New Year
from
Viorel ...
Message 3
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| Subject: | Re: Need Rotax 912S Help To Get The 7-Oh-Fun Back Home |
Hi John,
Sorry to hear about your troubles. I do not have any Rotax experience yet,
but have had an engine lose compression after overheating. Twice. So your
plan of attack seems reasonable. Since I am in Marysville, contact me if
you could use an extra hand for anything. If you want to move the plane by
ground, my pickup is available as well.
Best of luck,
Ken
On Sun, Dec 30, 2012 at 10:18 AM, John Marzulli <john.marzulli@gmail.com>wrote:
> I need some Rotax advise as my plane is stranded at another airport.
>
> The coolant overflow bottle failed in flight. The first sign was some red
> fluid in the cockpit a few minutes after take off. At first I thought it
> was brake fluid.
>
> I noted the EGTs were high, but the CHTs were in range, and the oil temps
> were slightly high, but not in "the red zone"
>
> A minute later I started smelling something in the cockpit and turned
> back to the field at reduced power.
>
> A few minutes later I lost one of the CHT probes, but the other was
> reading fine. A few minutes after that I lost the other CHT probe. Oil
> temps at this point were still just into the yellow zone.
>
> On the ground I pulled the cowling and found the coolant bottle had
> melted a hole at the point closest to the oil reservoir. The shrink wrap
> that holds the CHTS in place had melted and the CHT connectors had come out
> of position.
>
> I was able to get some more DexCool and field replaced the coolant bottle
> with some attempts to heat shield it.
>
> Runup and pre-flight were normal. The engine made normal power on take
> off. After climbing above the airport I noticed the CHTs were still high.
>
> The engine was also only making 5100RPM in level flight with full
> throttle. I normally can exceed 5500 with my prop pitch.
>
> I landed back and found a hangar to tuck it back in at.
>
> So now the question is, what should I be looking for? The engine ran
> smooth. Shut down was brisk as always. Based on this I do not think one of
> the pistons is damaged.
>
> The current plan is to compression test it, check the plugs and pull the
> oil filter to look for metal.
>
> Does anyone else have any ideas?
>
>
> John Marzulli
>
> http://MarzulliPhoto.net/
> http://701Builder.blogspot.com/
>
> *
>
> *
>
>
Message 4
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| Subject: | Re: Need Rotax 912S Help To Get The 7-Oh-Fun Back Home |
Hi John, I would do a compression leak down test make sure all your
cylinders are up to par. More than likely when you filled with coolant
after you lost it the first time, you had an air pocket somewhere. This
happened on my first flight on my Rotax 912ULS. Head temps got up into
the higher portion so I landed let cool down and taxied back to the
hanger and did a compression leak down everything was fine. Refilled
with coolent and purged all air by running up to temp and checking it,
running up to temp again and checking it until it was full every time.
It has been fine since then. You need to look at your temperature
sensors on the front and back of the engine and if the plastic insulator
around the center is distorted or has melted it was overheated badly and
should be checked. Hope all is fine good luck,
Tom
On Dec 30, 2012, at 2:03 PM, Ken Lyons <ninjaneer451@gmail.com> wrote:
> Hi John,
>
> Sorry to hear about your troubles. I do not have any Rotax experience
yet, but have had an engine lose compression after overheating. Twice.
So your plan of attack seems reasonable. Since I am in Marysville,
contact me if you could use an extra hand for anything. If you want to
move the plane by ground, my pickup is available as well.
>
> Best of luck,
> Ken
>
> On Sun, Dec 30, 2012 at 10:18 AM, John Marzulli
<john.marzulli@gmail.com> wrote:
> I need some Rotax advise as my plane is stranded at another airport.
>
> The coolant overflow bottle failed in flight. The first sign was some
red fluid in the cockpit a few minutes after take off. At first I
thought it was brake fluid.
>
> I noted the EGTs were high, but the CHTs were in range, and the oil
temps were slightly high, but not in "the red zone"
>
> A minute later I started smelling something in the cockpit and turned
back to the field at reduced power.
>
> A few minutes later I lost one of the CHT probes, but the other was
reading fine. A few minutes after that I lost the other CHT probe. Oil
temps at this point were still just into the yellow zone.
>
> On the ground I pulled the cowling and found the coolant bottle had
melted a hole at the point closest to the oil reservoir. The shrink wrap
that holds the CHTS in place had melted and the CHT connectors had come
out of position.
>
> I was able to get some more DexCool and field replaced the coolant
bottle with some attempts to heat shield it.
>
> Runup and pre-flight were normal. The engine made normal power on take
off. After climbing above the airport I noticed the CHTs were still
high.
>
> The engine was also only making 5100RPM in level flight with full
throttle. I normally can exceed 5500 with my prop pitch.
>
> I landed back and found a hangar to tuck it back in at.
>
> So now the question is, what should I be looking for? The engine ran
smooth. Shut down was brisk as always. Based on this I do not think one
of the pistons is damaged.
>
> The current plan is to compression test it, check the plugs and pull
the oil filter to look for metal.
>
> Does anyone else have any ideas?
>
> John Marzulli
>
> http://MarzulliPhoto.net/
> http://701Builder.blogspot.com/
>
>
> _blank">www.aeroelectric.com
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