Gazebo/Blue transmission_interface/SimpleTransmission hardware_interface/EffortJointInterface hardware_interface/EffortJointInterface 1 transmission_interface/SimpleTransmission hardware_interface/EffortJointInterface hardware_interface/EffortJointInterface 1 Gazebo/Black transmission_interface/SimpleTransmission hardware_interface/EffortJointInterface hardware_interface/EffortJointInterface 1 Gazebo/Orange Gazebo/Grey Gazebo/Grey true gazebo_ros_control/DefaultRobotHWSim /racecar