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LycomingEngines-List Digest: 2 Msgs - 11/06/17

 
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collins04(at)cableone.net
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PostPosted: Tue Nov 07, 2017 5:45 am    Post subject: LycomingEngines-List Digest: 2 Msgs - 11/06/17 Reply with quote
Thank you all for your opinions.  With the engine monitoring systems we now often have we should be able to do a better job than just tying to judge vibration in the cockpit. 
Again, I have a Lycoming IO-360 in an RV8 with EGT and CHT real-time monitoring.  The question again is, what readings on these monitoring systems should I use to best protect the engine and still obtain/balance optimal performance for different altitudes/power settings. 
How about this, what settings would we look for at these “cruise”  power levels?  What do you use?  I know there may be some “high RPM/low MP” folks and some “low RPM/high MP” folks – so tell us why!?
  1. 45 – 50% power =
    1. RPM                                      ___
    2. Manifold Pressure           ___
    3. CHT                                        ___
    4. EGT                                        ___
    5. Fuel Flow                             ___
  2. 50 -55% power
    1. RPM                                      ___
    2. Manifold Pressure           ___
    3. CHT                                        ___
    4. EGT                                        ___
    5. Fuel Flow                             ___
  3. 55 – 60% power
    1. RPM                                      ___
    2. Manifold Pressure           ___
    3. CHT                                        ___
    4. EGT                                        ___
    5. Fuel Flow                             ___
  4. 60 – 65% power
    1. RPM                                      ___
    2. Manifold Pressure           ___
    3. CHT                                        ___       
    4. EGT                                        ___
    5. Fuel Flow                             ___


I know this is rather overloading, but to me it is what we need to aim for.  I know each airplane setup will be different, but there should be some targets out there.
Thanks again for the help with this.  In the end, there should be a “best use” range for these settings that will keep the engine happy.  With the technology that we have now, we should be able to do better than just throwing fuel at the engine and fouling plugs with lead.
Thanks!
Paul Collins
RV-8

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cluros(at)gmail.com
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PostPosted: Tue Nov 07, 2017 7:22 am    Post subject: LycomingEngines-List Digest: 2 Msgs - 11/06/17 Reply with quote
I think I understand your question now Paul. I just set up these parameters on an O-360 in an RV-6. I can give you my setup but does your engine monitor display % power or do you have to calculate it?

Sebastien

On Nov 7, 2017, at 05:41, Paul Collins <collins04(at)cableone.net (collins04(at)cableone.net)> wrote:
Quote:

Thank you all for your opinions. With the engine monitoring systems we now often have we should be able to do a better job than just tying to judge vibration in the cockpit.
Again, I have a Lycoming IO-360 in an RV8 with EGT and CHT real-time monitoring. The question again is, what readings on these monitoring systems should I use to best protect the engine and still obtain/balance optimal performance for different altitudes/power settings.
How about this, what settings would we look for at these “cruise” power levels? What do you use? I know there may be some “high RPM/low MP” folks and some “low RPM/high MP” folks – so tell us why!?
  1. 45 – 50% power =
    1. RPM ___
    2. Manifold Pressure ___
    3. CHT ___
    4. EGT ___
    5. Fuel Flow ___
  2. 50 -55% power
    1. RPM ___
    2. Manifold Pressure ___
    3. CHT ___
    4. EGT ___
    5. Fuel Flow ___
  3. 55 – 60% power
    1. RPM ___
    2. Manifold Pressure ___
    3. CHT ___
    4. EGT ___
    5. Fuel Flow ___
  4. 60 – 65% power
    1. RPM ___
    2. Manifold Pressure ___
    3. CHT ___
    4. EGT ___
    5. Fuel Flow ___


I know this is rather overloading, but to me it is what we need to aim for. I know each airplane setup will be different, but there should be some targets out there.
Thanks again for the help with this. In the end, there should be a “best use” range for these settings that will keep the engine happy. With the technology that we have now, we should be able to do better than just throwing fuel at the engine and fouling plugs with lead.
Thanks!
Paul Collins
RV-8





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rayeaker(at)gmail.com
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PostPosted: Tue Nov 07, 2017 9:19 am    Post subject: LycomingEngines-List Digest: 2 Msgs - 11/06/17 Reply with quote
There really are too many variables among airplanes and systems for anyone's response to accurately apply to your situation/airplane. I assume you have a constant speed prop, which would change all the answers above and likely be different for different prop/engine combinations.

Follow the guidance provided in the Pelican Perch articles by John Deakin and you will be able to come up with the numbers for your setup.
On Tue, Nov 7, 2017 at 10:19 AM, Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
Quote:
I think I understand your question now Paul. I just set up these parameters on an O-360 in an RV-6. I can give you my setup but does your engine monitor display % power or do you have to calculate it?

Sebastien

On Nov 7, 2017, at 05:41, Paul Collins <collins04(at)cableone.net (collins04(at)cableone.net)> wrote:
Quote:

Thank you all for your opinions.  With the engine monitoring systems we now often have we should be able to do a better job than just tying to judge vibration in the cockpit. 
Again, I have a Lycoming IO-360 in an RV8 with EGT and CHT real-time monitoring.  The question again is, what readings on these monitoring systems should I use to best protect the engine and still obtain/balance optimal performance for different altitudes/power settings. 
How about this, what settings would we look for at these “cruise”  power levels?  What do you use?  I know there may be some “high RPM/low MP” folks and some “low RPM/high MP” folks – so tell us why!?
  1. 45 – 50% power =
    1. RPM                                      ___
    2. Manifold Pressure           ___
    3. CHT                                        ___
    4. EGT                                        ___
    5. Fuel Flow                             ___
  2. 50 -55% power
    1. RPM                                      ___
    2. Manifold Pressure           ___
    3. CHT                                        ___
    4. EGT                                        ___
    5. Fuel Flow                             ___
  3. 55 – 60% power
    1. RPM                                      ___
    2. Manifold Pressure           ___
    3. CHT                                        ___
    4. EGT                                        ___
    5. Fuel Flow                             ___
  4. 60 – 65% power
    1. RPM                                      ___
    2. Manifold Pressure           ___
    3. CHT                                        ___       
    4. EGT                                        ___
    5. Fuel Flow                             ___

 
I know this is rather overloading, but to me it is what we need to aim for.  I know each airplane setup will be different, but there should be some targets out there.
Thanks again for the help with this.  In the end, there should be a “best use” range for these settings that will keep the engine happy.  With the technology that we have now, we should be able to do better than just throwing fuel at the engine and fouling plugs with lead.
Thanks!
Paul Collins
RV-8
 
 




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