Today's Message Index:
----------------------
1. 07:04 PM - GIII Oil Temp Problem (N37j@aol.com)
2. 07:46 PM - Re: GIII Oil Temp Problem (Bruce Gray)
3. 07:59 PM - Re: GIII Oil Temp Problem (Craymondw@aol.com)
4. 09:02 PM - Re: GIII Oil Temp Problem (steve korney)
5. 09:05 PM - Re: GIII Oil Temp Problem (steve korney)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | GIII Oil Temp Problem |
I first flew my glasair III last Sept. It now has only 10 hours, mainly
because of a persistent oil temp problem. It has a Monte Barrett engine, with
full Christen Inverted System. My oil cooler is a Positech 13 row unit,
advertised in Aircraft Spruce as applicable to a Lycoming IO540, which mine is.
The cooler is firewall mounted, with exit air on the lower right cowl. My own
louver design. Induction air is by a NACA-like scoop directly ahead of the
cooler, with a 4in diameter scat connecting the induction inlet directly to a
plenum I made to force the incoming air through the cooler. No leaks that I
can detect. The scat is about 5in long. We removed the Vernitherm and
heated it in water. It opened at about 180 degrees, and was fully open, as best
we could tell, at about 200 degrees, so it's probably OK. Oil cooler and
hoses to it from engine are clear. The oil temp sensor shows 210 degrees when
the water boils, so it's OK. Notwithstanding all the above, in flight at 24
squared and 4000 ft. the oil temp climbs quickly to 230 degrees, and might even
climb higher if I flew more than 1/2 hr or so. I've talked with Barrett
and other informed folks about this and of course laid awake nights trying to
figure what's wrong. I'm stumped and a little discouraged. What a great
airplane, and I can't fully enjoy it. Any ideas?
**************Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars. (http://autos.aol.com/used?ncid=aolaut00050000000007)
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | GIII Oil Temp Problem |
The older Positech oil coolers had a low flow rate and they changed
their
design. You might contact the Positech factory and see if your cooler is
pre
or post fix. If all else fails, find someone with a SW cooler for a GIII
that you can borrow. the SW is more efficient than the Positech.
Bruce
www.Glasair.org <http://www.glasair.org/>
-----Original Message-----
From: owner-glasair-list-server@matronics.com
[mailto:owner-glasair-list-server@matronics.com] On Behalf Of
N37j@aol.com
Sent: Tuesday, June 24, 2008 10:02 PM
Subject: Glasair-List: GIII Oil Temp Problem
I first flew my glasair III last Sept. It now has only 10 hours, mainly
because of a persistent oil temp problem. It has a Monte Barrett
engine,
with full Christen Inverted System. My oil cooler is a Positech 13 row
unit, advertised in Aircraft Spruce as applicable to a Lycoming IO540,
which
mine is. The cooler is firewall mounted, with exit air on the lower
right
cowl. My own louver design. Induction air is by a NACA-like scoop
directly
ahead of the cooler, with a 4in diameter scat connecting the induction
inlet
directly to a plenum I made to force the incoming air through the
cooler.
No leaks that I can detect. The scat is about 5in long. We removed the
Vernitherm and heated it in water. It opened at about 180 degrees, and
was
fully open, as best we could tell, at about 200 degrees, so it's
probably
OK. Oil cooler and hoses to it from engine are clear. The oil temp
sensor
shows 210 degrees when the water boils, so it's OK. Notwithstanding all
the
above, in flight at 24 squared and 4000 ft. the oil temp climbs quickly
to
230 degrees, and might even climb higher if I flew more than 1/2 hr or
so.
I've talked with Barrett and other informed folks about this and of
course
laid awake nights trying to figure what's wrong. I'm stumped and a
little
discouraged. What a great airplane, and I can't fully enjoy it. Any
ideas?
_____
Gas prices getting you down? Search AOL Autos for fuel-efficient used
<http://autos.aol.com/used?ncid=aolaut00050000000007> cars.
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: GIII Oil Temp Problem |
Sounds like a bad air leak or blockage from turbulence. My engine ran high
temps when new until I plugged every leak in the baffling I could find and
air foiled the intake. When the engine finally broke in, the oil temp went down
another 20 degrees (about 50 hours). I also cruise at higher altitudes
during the summer months around 8500 feet. I recently flew to Destin Florida in
94+ outside temps and experienced 215 oil temps at 3500 feet, but when I
climbed to 8500 feet it went down to 190. One builder friend added another small
oil cooler, another an enclosed plenum and lowered their oil temps. Remote
oil filters can also help cool oil. Leave full throttle on climb out, full
throttle on injected engines dumps extra fuel that cools the cylinders. If you
want to reduce power come back on the prop and try to maintain a cruise climb
of 140 plus mph. Lastly, I removed metal ducting from the bottom of my oil
cooler that I think ended up causing turbulence and that helped.
**************Gas prices getting you down? Search AOL Autos for
fuel-efficient used cars. (http://autos.aol.com/used?ncid=aolaut00050000000007)
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | GIII Oil Temp Problem |
Where are you...?
Best... Steve
From: N37j@aol.com
Subject: Glasair-List: GIII Oil Temp Problem
I first flew my glasair III last Sept. It now has only 10 hours,
mainly because of a persistent oil temp problem. It has a Monte Barrett
engine, with full Christen Inverted System. My oil cooler is a Positech 13
row unit, advertised in Aircraft Spruce as applicable to a Lycoming IO540,
which
mine is. The cooler is firewall mounted, with exit air on the lower right
cowl. My own louver design. Induction air is by a NACA-like scoop
directly ahead of the cooler, with a 4in diameter scat connecting the induc
tion
inlet directly to a plenum I made to force the incoming air through
the cooler. No leaks that I can detect. The scat is about 5in long.
We removed the Vernitherm and heated it in water. It opened at about 180
degrees, and was fully open, as best we could tell, at about 200 degrees, s
o
it's probably OK. Oil cooler and hoses to it from engine are clear.
The oil temp sensor shows 210 degrees when the water boils, so it's OK.
Notwithstanding all the above, in flight at 24 squared and 4000 ft. the oil
temp
climbs quickly to 230 degrees, and might even climb higher if I flew more t
han
1/2 hr or so. I've talked with Barrett and other informed
folks about this and of course laid awake nights trying to figure what's
wrong. I'm stumped and a little discouraged. What a great airplane,
and I can't fully enjoy it. Any ideas?
Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.
_________________________________________________________________
The other season of giving begins 6/24/08. Check out the i=92m Talkathon.
http://www.imtalkathon.com?source=TXT_EML_WLH_SeasonOfGiving
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | GIII Oil Temp Problem |
maybe that's because your making less horse power at 8500 ft. than at 3500
...
Best... Steve
From: Craymondw@aol.com
Subject: Re: Glasair-List: GIII Oil Temp Problem
Sounds like a bad air leak or blockage from turbulence. My engine ran high
temps when new until I plugged every leak in the baffling I could
find and air foiled the intake. When the engine finally broke in,
the oil temp went down another 20 degrees (about 50
hours). I also cruise at higher altitudes during the summer
months around 8500 feet. I recently flew to Destin Florida in 94+
outside temps and experienced 215 oil temps at 3500 feet, but when I climbe
d to
8500 feet it went down to 190. One builder friend added another small oil
cooler, another an enclosed plenum and lowered their oil temps. Remote oil
filters can also help cool oil. Leave full throttle on climb out, full
throttle on injected engines dumps extra fuel that cools the cylinders. If
you
want to reduce power come back on the prop and try to maintain a cruise cli
mb of
140 plus mph. Lastly, I removed metal ducting from the bottom of my oil coo
ler
that I think ended up causing turbulence and that helped.
Gas prices getting you down? Search AOL Autos for fuel-efficient used cars.
_________________________________________________________________
The i=92m Talkathon starts 6/24/08.- For now, give amongst yourselves.
http://www.imtalkathon.com?source=TXT_EML_WLH_LearnMore_GiveAmongst
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|