qt_pi/gazebo_sim/models/qt_pi_chassis/model.sdf

<?xml version="1.0" ?>
<sdf version="1.5">
    <model name="qt_pi_chassis">
        <pose>0 0 0.25 0 0 0</pose>
        <link name="link">
            <inertial>
                <mass>0.1</mass>
            </inertial>
            <visual name="visual">
                <geometry>
                    <mesh>
                        <uri>model://qt_pi_chassis/meshes/chassis.dae</uri>
                    </mesh>
                </geometry>
            </visual>
        </link>
    </model>
</sdf>