Hapag-Lloyd studies wind propulsion for boxships

German carrier Hapag-Lloyd has been studying wind propulsion options for newbuilds. The Hamburg-headquartered liner has unveiled a newbuilding concept design of a ship with a capacity of 4,500 teu featuring eight sails with a total sail area of 3,000 sq m. The six rear sails are extendable, and the two front ones retractable. According to