spherical drone 3d model

Design a fully enclosed spherical flying camera drone. The drone is a complete sphere, 22 cm in diameter. There are NO exposed propellers or rotors anywhere on the outside. All propulsion is internal using enclosed ducted fans. Inside the sphere, there are 4 internal ducted fans mounted on an internal frame. Each fan is inside a cylindrical duct, and the ducts connect to airflow channels. Air enters through small intake vents on the top of the sphere. Air travels through smooth internal ducts. Air exits through a ring of exhaust vents around the equator of the sphere. The internal structure should show: - ducted fans inside tubes - airflow channels - internal frame - battery in the center - flight controller in the center - camera module on the front The outside of the sphere should be smooth with vent lines, not propellers. The propulsion system must be fully enclosed inside the sphere. This should look like an engineered internal airflow propulsion system, not a quadcopter.