How to navigate VTOL

Hi guys, I am running a test for standard VTOL in Gazebo, by setting vehicle and model in the launch file to ‘standard_vtol’ . So VTOL appears in simulation, but its motion seems like a drone!
By setting the mode to off-board mode (offb_node), I send the position to the vehicle using this topic ‘mavros/setpoint_position/local’
Note: when I set a mission using qgcc, the behavior is different, so seems that I should set some commands in order to have the right VTOL motion!could you please help me, if I need to send the position to VTOL, what is the right way to do that?