Hypersonic Acceleration The U.S. military has gone from ignoring to prioritizing hypersonics in barely two years after decades of on-again, off-again research frittered away a technological lead over Russia and China. Now there are at least three U.S. high-speed strike missiles in development and an urgent requirement to defend against its adversaries’ hypersonic weapons. DARPA’s rocket-accelerated Tactical Boost Glide and scramjet-powered Hypersonic Air-Breathing Weapon Concept ...


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