More information
Gentlemen, Thanks for the input! Here is more information. I am running a whirlwind RV-200 constant speed prop. The Manafold Pressure and RPM as well as FF were all constant at the time. I was running the engine at slightly lean of peak about 7.8 GPH. Yes, I did have the data logged and uploaded it to Saavy and Cirrus reports. I did erase the SD card after after all of my flights were uploaded to both web sites. Dumb! Does anybody know how to download the data that has been uploaded to them? I tried to do that last night on Savvy's website but all it lets you do is share it.
I did an oil change after returning from the trip and I do have the oil filter on the workbench. I will cut it open when I return home. (Im an airline pilot and yes Im working!)
Im going to share with you my user name and password for Savvy.
[email protected] Pass=Shunknife#45 N524DC
It's the flight from Hamilton NY (VGC) to Olean (OLE)
One other thing I want to pass along, I have messed with car engines since I was a kid. Im sure everyone has set the timing on a distributor before so you know what the engine sounds like when it's either too far advanced or too retarded. Looking back on this flight I was paying particular attention to everything the entire flight because "something" did not sound right and you will notice a slight jump in the CHT's earlier as well. Another note, I removed the jumper wire and installed an Enginebridge PMAG controller(
https://www.enginebridge.com/product/eiwifi/) about a year ago. No, I do not have it displaying on my G3X and no I did not have my iPhone connected to it at the time.
I did wi-fi it to my cell phone and the subsequent flight home to monitor the advance of the PMAG and saw nothing abnormal on that flight.
I flew the airplane last week after the oil change with the enginebridge connected to my cell phone and noticed a few things.
On the ground:
800 RPM 9.3MP 25.2 degrees advance
1200RPM 8.6MP 28.0 advance
1600RPM 11.1MP 29.4 advance
1800RPM 12.7MP 30.8 advance
2300RPM 16.4MP 35.0 advance
Note: The ignition is at 25.2 degrees BTDC at idle, I thought it should be at 20 BTDC until 1800 RPM.
In the air
4500' 2500RPM 23.3MP 35 advance
2500RPM 24.0MP 32.2 advance
2500RPM 24.5MP 30.8 advance
Notice the drop in the advance as I increase MP
Same thing at 5500' MSL
2500RPM 24.8MP 28 advance
2500RPM 23.0MP 35 advance
2500RPM 22.6MP 35 advance
The first phone call I made was to Airflow performance and spoke with Kyle about what may be going on and his first question to me was "do you have an electronic ignition"? The second phone call I made was to E-Mag and spoke with Brad. He told me that he had not heard of such a thing and that in "no way could the PMAG advance to a value greater than 41degrees". As a side note I have tried to contact him over the past two weeks and none of my phone calls have been returned. The third phone call I made was to enginebridge asking them if the unit I have connected to the PMAG could have changed the settings somehow in the PAG and his answer was NO. Like I stated earlier, my cell phone was not wi-fi connected to the enginebridge at the time of the occurrence.
Well, There is a lot stuff to chew on here! It's my understanding from a previous conversation with EMAG that up to 1800 RPM the PMAG ignition should be at 20 degrees BTDC. After 1800 RPM then it looks at MP. It should stop at 35 degrees BTDC which it appears to be doing but can go to 39 degrees. EMAG limits it to 41degrees. Note, timing is in 1.4 degree increments in other words timing may be 25.4 degrees.
The EMAG firmware was update to the current version (41 I believe) in January of 2020 and the slick magneto was overhauled at the same time, both during condition inspection.
Dave