"쇳물도 녹는 1680도" 전투기 엔진을 단 6개국만 만드는 과학적 이유, 중국이 25조 쏟고 터진 기술의 진짜 비밀

In a fire hotter than the temperature at which molten metal flows, the metal is not melting; instead, it is spinning tens of thousands of times per minute. Does this make sense? This single question encapsulates the entire reason why only six countries in the world are capable of manufacturing fighter jet engines. China poured 25 trillion won into this technology only to have its engine explode, and an intelligence agent caught attempting to access blueprints from GE in the U.S. was sentenced to 20 years in prison. This means that this is technology that cannot be bought with money or even by spies. In this video, we explain, using everyday analogies, everything from the physical tricks that prevent metal from melting at normal temperatures (the principles of single-crystal alloys, film cooling, and three layers of ceramic coating), to the deep breathing principle used by jet engines to generate thrust, why semiconductors allow for division of labor while engines do not, and how Korea, having already become the fifth country in the world to produce gas turbines, is now challenging for the sixth spot. After watching this video, you will be able to explain to someone "why fighter jet engines are more difficult than semiconductors." Chapter 00:00 1680 Degrees, Where Even Molten Iron Melts — How Impossible Is That Temperature 02:00 Why Doesn't It Melt — Single Crystal, Cooling, and Coating: The Three-Layer Secret 04:10 The Principle of How an Engine Pushes the Sky — Deep Breathing and Afterburners 06:15 Why Can Only 6 Countries Worldwide Manufacture It — The Reality of Technological Blockades 09:00 Korea’s Challenge — Doosan’s 38,000 Hours, Hanwha’s 46 Years 11:20 What Is Contained in a Finger-Sized Wing