I came along this beautiful flight analysis Wiki entry from Tridge.
But even by this help I can't resolve my current issue.
My plane is an EasyStar comparable plane without using ailerons.
APM2.5 with V2.73.
Testing waypoint flights without any wind I still got major
deviations. Here my rectangle running it three times. My
analysis is the 250m line between waypoints 41 to 48 on
the second loop. I did this flight several times by playing
with different PID values as proposed in the threads.
The pictures show the deviation to the track and the roll values.
It seems that Roll follows NavRoll quite well.
But NavRoll comes up somehow very late.
The deviation is switching at tick 15 (15*0.2s => 3s) to the negative side.
NavRoll is going much later at tick 89 (89*0.1s => 8.9s) to the negative side.
I would expect that this should be following somehow very much faster.
Attached the paramter setup from the beginning of the log.
Now I need a hint how to analyse further.
thanks in advance