Leonhardt & Blumberg Fits First Newbuild with Econowind Wind Propulsion Systemby Ship & Bunker News TeamLeonhardt & Blumberg sees wind propulsion as a logical step forward. Image Credit: EconowindGerman shipowner Leonhardt & Blumberg has equipped its general cargo vessel Hansa Drejoe with Econowind’s VentoFoil wind propulsion system. Econowind expects the VentoFoils to provide about 10% additional thrust, cutting fuel consumption and CO2 emissions. The four vessels were designed with wind propulsion in mind. “We see wind-assisted ship propulsion as a logical next step in our journey toward greeneroperations,” Christoph Meier, Naval Architect at Leonhardt & Blumberg, said.