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1. 10:32 AM - Re: Oil capacity (Flysrv10)
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| Subject: | Re: Oil capacity |
Thanks Jessie for the top. I normally see average of 180. In winter travel, I
may only see 160. Since I don't live in a cold climate, I have not worried about
the low temp.
Sent from my iPhone
> On May 28, 2016, at 9:13 PM, Jesse Saint <jesse@saintaviation.com> wrote:
>
>
> I had an engine that seemed to always run hot oil. I talked to Mahlon at Mattituck
and he said to check the temp of the oil filter after a flight with a laser
thermometer with the engine running. He said the oil filter should be within
10-15 degrees of the oil temp sensor if the sensor is working correctly. Ours
was about 30-35 degrees cooler. He said it was most likely a bad probe and
to carry on. Just a thought, but it could be the probe or the wiring to the probe.
I have seen that before. What is the lowest it runs in cruise?
>
> Jesse Saint
> Saint Aviation, Inc.
> 352-427-0285
> jesse@saintaviation.com
>
> Sent from my iPad
>
>> On May 28, 2016, at 10:22 PM, Flysrv10 <flysrv10@gmail.com> wrote:
>>
>>
>> Thanks. I agree.
>>
>> Sent from my iPhone
>>
>>> On May 28, 2016, at 1:11 PM, P Reid <rv10flyer@live.com> wrote:
>>>
>>>
>>> Kelly beat me to the same response. There shouldn't be s reason why you should
see 220 if you can cut back the power to keep airspeed up initially as the
temps on the CHT goes down than add power you should be able to keep everything
low.
>>> My flight this morning
>>> FT on takeoff
>>> 2500 rpm at 800 male
>>> Power back to 85%
>>> Oil was 193 and CHT Topped 395f
>>> Went down from there.
>>>
>>> Don't let the oil get too hot but also don't worry if it does get up there
(220-225) for s brief moment because you need altitude or another reason.
>>>
>>>
>>>> On May 28, 2016, at 7:42 AM, Kelly McMullen <kellym@aviating.com> wrote:
>>>>
>>>>
>>>> I would recommend against allowing oil temp to climb above 225. Yes, Lycoming
red line is 245. You do not want to operate anywhere near the red line, as
oil begins breaking down much above that, and the oil temp probe is at the coolest
point in the whole oil system, in the return line from the oil cooler.
>>>> Take action via increased airspeed and/or reduced power as soon as oil temp
goes above 220. It will take time for it to come down. It may in fact increase
some before it starts to come down.
>>>> Kelly
>>>>
>>>>> On 5/28/2016 7:29 AM, Flysrv10 wrote:
>>>>>
>>>>> I want to thank everyone for responding to my issue. Lots of good information
that will help me decide what to do, if anything.
>>>>>
>>>>> On my return trip next week, I am going to continue the climb to see if I
reach 245 deg oil temp. Hopefully it will stabilize somewhere below 245. If I
find something useful, I will share with the group.
>>>>>
>>>>> Sent from my iPhone
>>>>>
>>>>>> On May 27, 2016, at 8:04 PM, <kboatright1@comcast.net> <kboatright1@comcast.net>
wrote:
>>>>>>
>>>>>>
>>>>>> Unless you're low enough on oil to lose oil pressure, oil quantity does
not have an appreciable impact on oil temperature. More oil does not result in
more cooling capacity. Cooling capacity is the a function of the cylinder fins,
the oil cooler, and the surface of the engine block, accessory case, and sump.
All of those reject heat into an airstream which has a flow rate and a delta
T(emperature). Adding oil doesn't change the mass flow through the oil cooler
or the surface area which is radiating heat, nor does it change anything
about the airstream.
>
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