Your Flight Log Viewer is absolutely amazing! Great job. I noticed at the 1-minute and 4.3-second mark that the “propeller fell off”, which must have been when it experienced a catastrophic break. It seems like there might have been a stress fracture or an imperceptible crack in the propeller that wasn't visible during the pre-flight inspection. Regardless of the cause, kudos to you for developing such a fantastic app, @msinger!
Thank you for your patience and assistance. I really cannot thank you enough!! I have been working on this puzzle for a bit now and it's nice to have some closure. This old P4P V1 has been good to me!! Now, I need to figure out what I am going to do with it.
14.7s: Downlink dropped (this continued several more times during the next 44 seconds)
1m 4.3s: Aircraft recorded a prop fell off
2m 9.5s: "Your mobile phone Wi-Fi is using the 5.8 GHz frequency and conflicting with the remote controller. Please disable Wi-Fi or change Image Transmission Settings" message displayed (which might explain why the downlink kept disconnecting)
And some other findings (according to the log data):
The home point was never marked
0 satellites for the entire 2m 32s flight
No record of an attempted ascent prior to the prop falling off (both sticks were in the center position for 99% of the flight)
While you experienced several issues during this flight, it seems that prop was damaged at some point pre-flight and ultimately led to it detaching mid-flight.
I do not see the DJI name on that prop. The underside was a clue as I don’t see the typical mold marks that are always there. These aftermarket props are not acceptable for anything that I have in the air. Look closely at this one(definitely DJI)to see the mold marks and the DJI name and prop size that should be there.
I’m not 100% certain this was your issue, but I have always thought the plastic material used by other than DJI makers do not meet specifications needed to insure longevity. Age of your props may be a factor in this unfortunate instance.