Recently, the research project wPCC (wind Powered Car Carrier) entered a new phase when the new concept was tested at SSPA. The project aims to develop a sailing vessel that can transport 7,000 cars across the Atlantic, resulting in a reduction of energy consumption by approximately 90 percent. Designing and testing sailing cargo ships requires completely new calculation tools to be developed. The model tests were performed in SSPA’s Towing Tank to validate the computations. The results will be used to optimize the design of the rig, hull and appendages. The research project is led by Wallenius Marine, with the Royal Institute of Technology (KTH) and SSPA as partners.