I just setup a turnigy 4wd 1/16 scale rover vehicle with an apm 2.5 and the rover code, and I am unsure how to tune the steering.  I cannot get it to turn at all.  I put it in auto mode and turn the body of the car expecting the wheels to point in…

Does anyone know why my barometer (altitude) would be fluctuating so greatly when the aircraft is not even flying?  I have it on a table in my house connected to the mission planner software.  When I first connected the aircraft to my laptop I saw…