Hi, we were trying to fly a fixed-wing in auto mode. In the first try, it tried climb up with a way more higher pitch than we planned. Suddenly it starts to duck and climb, we took control with RC and gracefully landed it. In the second try, it launched and flew nice. But in the auto mission mode, we tried to send MAV_CMD_DO_CHANGE_SPEED (178) command and also MAV_CMD_MAV_WAYPOINT (16) command within MISSION_ITEM_INT (73) message for altitude change. These commands work with SITL and this is how Mission Planner implemented them. But sometimes they do not work. In the second try we tried to send those commands and non of them worked. I can’t find a solution for this. I have attached the .TLOG file that covers both of the flights. Can you help me out with this ducking behaviour and command failings?
hard to tell with a tlog. Better to look at the .bin log for the flight.
One thing I can see is the speed.
3 0 0 178 0.000000 28.000000 -1.000000 0.000000 0.000000 0.000000 0.000000 1
Looks like this plane flies at about 16 m/s. Asking 28 m/s might be optimistic. Again, it’s better to look at the .bin.
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