Korean Air  & Hyundai Rotem  Begin Methane Engine Program for Reusable Launch Vehicles Korean Air and Hyundai Rotem have launched a KRW 49 billion, government-backed initiative to develop a reusable 35-ton-class methane rocket engine, a technology increasingly viewed as essential for next-generation, repeat-use launch systems.  The program, overseen by the Korea Research Institute for Defense Technology Planning and Advancement  (KRIT), will run through October 2030 and offic