I had my taranis to set the flight mode channel to RTL as it's failsafe. I did not set the APM failsafe, I should have tested this, but it does not work and I'm not sure I understand why.
Testing on the bench, If I center all sticks and flip my RTL switch, CH5 goes to 1903 and it the flight mode changes to RTL. However if i turn the radio off I get the exact same change, but the flight mode does not change!! Why not? During the flight, the flight log even shows that the mode changes to RTL (the first 2 times, the 2 other were manual i think), but it definitely didn't behave that way.
I've since turned on the APM throttle channel failsafe and it tests fine.
About 30 seconds in I got a RSSI critical warning and it started to fall. It recovered but i definitely didn't have good control for about 15 seconds before it started to fly away.
My other question is what made it fly away? from about 0:55 to 1:30 it shows it was in stabilize but I had no control and I was watching it was fly away. I eventually powered cycled the Taranis and flip the RTL switch. This worked but I wasn't sure at the time, as it was just slowly desending. I got impatient, switch backed to STAB, and was suprised i had control again! I brought it back as fast as i could. I was panicking and landed it hard enough to break a landing leg and prop ( i was just glad it was dry)
I think my antenna position was bad, so i'm going to getting one of those printed V stands. I had it in a V but on the leg, maybe too close to the battery.
Other than testing the fail safe and a walking range radio test, is there anything I could do before my next flight? I still don't feel like i really understand everything that happened.