Ok, how does the Turbosail work? Extra point for that one who'll uncover that mistery
How the Turbosail works:
A small fan draws air into the 33-foot towers, boosting wind speed over the
leeward side and creating forward lift several times the power of traditional sails.
In the diagram, F is the force created by the fan; R is the resistance, or drag, of
the airflow; P is the push of the deflected air
Short works like wing on a airplain