South Korea, May 27 -- The Rolls-Royce MT30 marine gas turbine and controllable pitch propellers, as well as mtu powered diesel generator sets, have again been selected for the Republic of Korea Navy's (RoKN) FFX Batch IV frigate, known as the Ulsan Class frigate.The first two ships will be built by Hanwha Ocean. Rolls-Royce has already successfully worked with the RoKN and DAPA to introduce a revolutionary, modern and simple, hybrid propulsion system arrangement for all eight ships in the Daegu-class FFX Batch II and all six ships in the Chungnam-class FFX Batch III Anti-Submarine Warfare frigate programme. Each are powered by a single MT30 gas turbine and electric propulsion motors. Four generator sets with mtu 12V4000 M43 diesel engines ...