Hyundai Heavy Cleared to Offer LNG-Fueled VLCC with Rotor Sails 6 June 2019 The VLCC would reach 5-7% in fuel savings with the rotor sails.Author: Capt. Johnhttps://worldmaritimenews.com/archives/278078/hyundai-heavy-cleared-to-offer-lng-fueled-vlcc-with-rotor-sails/