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  #41  
Old 10-19-2019, 10:40 AM
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GalinHdz GalinHdz is offline
 
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Quote:
Originally Posted by N941WR View Post
I wonder if the steady state temperatures are a result of the engine block heat soaking the P-mags.
Bill; Do you have a way of recording your oil temp after shutdown? If so, it would be interesting to correlate this with the P-mag temps you have recorded.

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  #42  
Old 10-19-2019, 01:08 PM
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Quote:
Originally Posted by GalinHdz View Post
Bill; Do you have a way of recording your oil temp after shutdown? If so, it would be interesting to correlate this with the P-mag temps you have recorded.

Duh! Why didn't I think of that.

Yes, the SkyView continues to update the temperatures. Let me see if I can grab the data and correlate it to the P-mag temperatures. It will be close but not exact.
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  #43  
Old 10-19-2019, 06:38 PM
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Originally Posted by N941WR View Post
Duh! Why didn't I think of that.

Yes, the SkyView continues to update the temperatures. Let me see if I can grab the data and correlate it to the P-mag temperatures. It will be close but not exact.
Bummer, It looks like when I shut the plane down, I also powered down the SkyView. The log data doesn't exist, Oh well, I guess I'll have to do another flight.
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  #44  
Old 10-19-2019, 08:54 PM
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GalinHdz GalinHdz is offline
 
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Quote:
Originally Posted by N941WR View Post
Duh! Why didn't I think of that.

Yes, the SkyView continues to update the temperatures. Let me see if I can grab the data and correlate it to the P-mag temperatures. It will be close but not exact.
Cool. We don't need exact numbers only the trend. It would be very interesting if the oil temps also showed the same 15min trend.
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Originally Posted by N941WR View Post
Bummer, It looks like when I shut the plane down, I also powered down the SkyView. The log data doesn't exist, Oh well, I guess I'll have to do another flight.
That is why I asked if you could record the temps "After Shutdown".
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Last edited by GalinHdz : 10-19-2019 at 08:58 PM.
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  #45  
Old 10-22-2019, 04:15 PM
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FWIW: I flew today and kept my SkyView display on for 30min after engine shutdown. This is what the oil temps were:

Cruise Flight 208
Shutdown 196
5 Min 191
10 Min 187
15 Min 187
20 Min 186
25 Min 182
30 Min 179

At least with my airplane (Lycoming O360-A4M) there was no 15 Min peak of oil temp. I have no way of recording P-mag temps.

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  #46  
Old 10-22-2019, 04:26 PM
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Quote:
Originally Posted by GalinHdz View Post
FWIW:
At least with my airplane (Lycoming O360-A4M) there was no 15 Min peak of oil temp. I have no way of recording P-mag temps.

The oil temp in the sump is at peak when the engine is running. The 15 min "Peak" discussed earlier in the thread is how long it takes for the higher engine temps to propagate into the P-mag. You have 350 degree cylinders and heads that are going to give off their hear to the surrounding engine components and the air inside the cowl. I am sure the oil inside the valve covers peaks well above 250 some time after shutdown.
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  #47  
Old 10-22-2019, 06:01 PM
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In simple terms, when the cooling air stops, all component temperatures begin to equalize.
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  #48  
Old 10-22-2019, 08:40 PM
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Yup, but we were looking to see if there was an equivalent temp trend between the P-Mags and Oil Temp once cooling air stopped flowing. At least with this one data point there doesn't seem to be one.

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  #49  
Old 10-24-2019, 01:38 AM
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Oil door with spring does help!

http://www.cleavelandtool.com/Oil-Do.../#.XbFGSegzaUk

On all stops, I open the oil door. So due to thermal effect, the hot air is going out/ventilate the rear of the machine. For sure, the heat is coming from the engine
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  #50  
Old 10-24-2019, 01:45 AM
Bevan Bevan is offline
 
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I do the same. Sometimes wish I had a way to pop open the oil door from the cockpit.

Bevan


Quote:
Originally Posted by swisseagle View Post
Oil door with spring does help!

http://www.cleavelandtool.com/Oil-Do.../#.XbFGSegzaUk

On all stops, I open the oil door. So due to thermal effect, the hot air is going out/ventilate the rear of the machine. For sure, the heat is coming from the engine
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