🇨🇳 PENTAGON IN PANIC: CHINA TESTS SHAPE-SHIFTING HYPERSONIC RAMJET ENGINE China has pulled off a major hypersonic breakthrough by ground-testing a variable-geometry Ramjet that reshapes its own internal airflow channel in flight — much like a throat tightening and relaxing — and runs continuously from Mach 1.8 all the way to Mach 6 without leaking superheated gases or needing a heavy rocket booster to get started. 🔸 Chinese engineers solved the decades-old problem of creating reliable airtight seals for moving parts inside variable-geometry Ramjets, a challenge that caused severe gas leaks at extreme heat and speed and led most countries to abandon the design entirely. 🔸 The engine’s combustion chamber throat adjusted itself in just one-third of a second while inhaling gases at 1,650 degrees Celsius, delivering stable performance across a wide speed range that previously required separate boosters and added cost and complexity. 🔸 The graphite seal used in the Chinese breakthrough is the same one the US defense industry desperately needs. The US defense industry, now faces vulnerabilities in its graphite supply chains – material critical for missile nose tips, rocket nozzles, stealth coatings, and nuclear reactor components. 🔸 China produces nearly 80 percent of the world’s graphite, including the high-purity grades needed for aerospace, and restricted exports of the material to the United States starting in late 2024. 🔸 Washington has invoked the Defense Production Act to fund domestic and allied graphite mining while Europe pushes similar efforts under its Critical Raw Materials Act, yet building new supply chains from scratch is expected to take a decade or more.