My plane is about 5.5kg, wingspan 1.8m.Firmware 3.5
Altitude used to maintain well,about 1m waving.
But now,i don’t know when,the altitude fluctuating more obviously,10m maybe.
Altitude below i set was 100m.
It flies well in FBWA mode, maintain the airspeed well, hit the flight course well.
And i try to do the TECS tuning ,including adjusting TRIM_ARSPD_CM,TRIM_THROTTLE, TECS_TIME_CONST.But without apparent improving.
Log is a little big,you can download it below.
Hoping you guys can help me fix the problem,I was completely depressed by it.