Chinese researchers have designed a new type of rocket engine that could be used to make advanced stealth missiles. No such missiles have yet been created or tested. Chinese scientists say they have made a big breakthrough in rocket propulsion technology that could potentially allow them to build next-generation stealth missiles capable of changing speed in midair and evading detection by early warning systems. However, at this stage, the technology has not been tested. Instead, the new findings were acquired using computer models, according to Interesting Engineering . The reported advancement was allegedly inspired by faults in the Boeing spacecraft…