I have a problem with my new X8 and APM 2.5 and the latest Arduplane firmware.
Whenever I switch to loiter the aircraft loiters but loses altitude fairly rapidly.
I have not had this issue with previous planes I have used the autopilot in, only the X8.
I am not sure whether some of my parameters are incorrect or whether I am doing something wrong with the elevons or what the issue is.
The plane flies well in manual and when I stabilize test it on the ground it behaves as it should.
When in stabilize while flying the plane will always lose altitude unless I adjust the pitch manually.
Should stabilize try and maintain the current altitude or just attempt to stabilize the plane?
I have not tried any other auto modes until I can get the thing to maintain altitude.
I have attached a tlog and if anyone cares to take a look you will see it lose altitude when loiter is engaged twice during the flight until I manually pull it back up again.
The flight does not start until 43% through the log file.
I should also add that when I switch to loiter the throttle drops right back then the plane dives and throttles up.
I am using and airspeed sensor and I have tried both methods available for maintaining altitude.
Hopefully someone can shed some light on the problem.