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  #1  
Old 12-19-2019, 10:53 AM
jfrank71 jfrank71 is offline
 
Join Date: Jun 2014
Location: Cotulla, TX
Posts: 185
Default RV-10 Engine Data Review

I had and episode yesterday in the -10. Entering the pattern, the engine started running very rough and had a significant loss of power with EGT spikes over 1600 on four cylinders and EGTs gone cold on two cylinders. Understand there is a user on VAF named "Marion"?? that is willing to review engine data logs. I would like to pass these logs on to him/her for review.

Thanks to all

Frank
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  #2  
Old 12-19-2019, 11:20 AM
sailvi767 sailvi767 is offline
 
Join Date: Sep 2010
Location: Charlotte NC
Posts: 1,388
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I assume you were adjusting the mixture in decent. This sounds exactly like a engine leaned for cruise flight would react if no mixture adjustments during decent. Don?t ask me how I know!
G
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  #3  
Old 12-19-2019, 11:31 AM
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rleffler rleffler is offline
 
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Location: Delaware, OH (KDLZ)
Posts: 4,283
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I highly recommend https://www.savvyanalysis.com

There are quite a few RV-10s in the database, so you can periodically review your metrics compared with other RV-10s.

If you sign up for their pay service, you can get one of their A&Ps to review your data or ask targeted questions.

I've got every flight since day one. It makes it real easy to perform trend analysis.
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  #4  
Old 12-19-2019, 11:34 AM
jfrank71 jfrank71 is offline
 
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Location: Cotulla, TX
Posts: 185
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Mixture was increased through the decent. About 1" inch back from full rich at this point. Engine logs show spike in EGT but only on 4/6 cyl. Other 2 went cold at same time. Thats why I'm looking for an expert on engine logs to review and offer some insight.
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  #5  
Old 12-19-2019, 11:46 AM
TimO TimO is offline
 
Join Date: Feb 2005
Location: Wisconsin
Posts: 649
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If they went totally cold, could be ignition related too, but make sure to add in your post the pertinent details like what ignition systems you have on each side. To lose both, on only 2 cylinders, would be unusual for sure, if they are different types or even 2 mags. But it would seem to sound like leaning. Or perhaps a plugged fuel spider. May want to also provide engine details.
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  #6  
Old 12-19-2019, 03:20 PM
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RV10inOz RV10inOz is offline
 
Join Date: May 2008
Location: Brisbane Qld. Aust.
Posts: 2,308
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Could be intake leaks.....how many hours and is it a Lycoming built engine?

Send me the data file if you wish. davidbrown 'at' advancedpilot.com
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  #7  
Old 12-19-2019, 06:50 PM
Boyd Birchler Boyd Birchler is offline
 
Join Date: Sep 2014
Location: IN
Posts: 254
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Check the fuel tank breather of the tank used for descent.

If the vent is clear I would look at the fuel strainers/filters including the one in the fuel servo.

If they are clean I would open the fuel divider to make sure there is no trash floating around blocking the individual lines going to the cylinders.
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  #8  
Old 12-19-2019, 08:48 PM
Captain Avgas Captain Avgas is offline
 
Join Date: Oct 2005
Location: Melbourne, Australia
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Quote:
Originally Posted by rleffler View Post
I highly recommend https://www.savvyanalysis.com

If you sign up for their pay service, you can get one of their A&Ps to review your data or ask targeted questions.
+1 Could be time to clean the cobwebs out of your wallet.
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  #9  
Old 12-20-2019, 09:40 AM
T.O.Craig T.O.Craig is offline
 
Join Date: Feb 2006
Posts: 166
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Savvyanalysis.com is truly the only way to go. They have all my flights also. Huge data base with our engine configurations.

By the way we are flying now with 20 hrs.. Great plane..
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FLYING NOW AFTER 13+ YEARS. NICE FLYING AIRCRAFT!!
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  #10  
Old 12-20-2019, 01:56 PM
rdrcrmatt rdrcrmatt is offline
 
Join Date: Oct 2014
Location: Milwaukee, WI
Posts: 312
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Another happy Savvy user here.
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