Airflow controller canopy The AC external canopy is designed to automatically limit the airflow even in case of high pressure thanks to a patented device. The mechanism is composed of a silicon strip which moves according to the airflow, reducing automatically the air section when the airflow gets higher, contrary to a fix canopy which airflow increases quickly with the pressure. (see diagramm in datasheet page). A-EMM Aereco canopies. A patented design to control the maximum airflow (1) 1