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.
Replies
How is 'level' set up, each time at the field or once on the bench? Could it be that you need to set the 'level' with the nose up a few degrees?