Just looking to get some guidance on an issue I’ve never seen before.
One of our hexacopters (running AC 3.5.7) had a series of radio failsafe events (a normal occurance for us as we run Spektrum RC gear with satellite receivers on the drone for short distance manual ops as our systems are mostly used in auto missions). FS_THR was set to “2” which should just mean the copter continues on with the mission in AUTO mode.
In this particular case though, the log file (LINK) shows the drone erratically switching between STABILIZE, LOITER and AUTO (the three flight modes we setup) even though the pilot never touched the flight mode switch.
This happened on exactly the same mission that had been run 15mins prior, with the same drone, without incident. So it seems unlikely that external environmental factors would cause this.
What I don’t understand is the log file shows the radio inputs changing and thus the flight modes changing (as they should - as if the pilot was physically moving the switch on the Transmitter). This has never occured before and I’m wondering if anyone else has experienced this before or could help shed light on what might have caused this so we can work to ensure it never happens again.
We’ve ruled out the Transmitter and Receiver as they’ve both been re-used and re-tested and operate exactly as expected.
Could this be a receiver power issue? What would cause the receiver to change inputs without the transmitter changing?
Really appreciate anyone’s help or knowledge. Thanks in advance.