Airflow Caravans - Cabarlah: Airflow Caravans: The front of the Caravan is shaped to allow the air from the tow vehicle to flow directly over the van, reducing drag. Airflow Caravans - Cabarlah:  Airflow Caravans: The front of the Caravan is shaped to allow the air from the tow vehicle to flow directly over the van, reducing drag.