I have ROS kinetic (removed gazebo7 and installed gazebo7.12) and installed both Ardrone_anatomy and tum simulator from this

link text and it went well. when i send a take off command or stop after any command for example fly forward, the UAV keeps going backward slowly like. i checked the necessary hector packages and they are installed :

sudo apt-get install ros-kinetic-hector-gazebo
sudo apt-get install ros-kinetic-hector-sensors-gazebo
sudo apt-get install ros-kinetic-hector-xacro-tools

according to link text. would be grateful if someone had come a cross such a thing