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China is building the world’s fastest wind tunnel to simulate hypersonic flight at speeds of up to 12 kilometres per second.
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So...26,800 mph? That's above mach 25 and the speed at which objects reenter the atmosphere from space. Assuming it didn't burn up from the friction, you wouldn't even need a warhead on such a device.
Let's just say I find it difficult to believe that a projectile could effectively sustain such speeds without catastrophic results.
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The US military tested HTV-2, a Mach 20 unmanned aircraft in 2011 but the hypersonic flight lasted only a few minutes before the vehicle crashed into the Pacific Ocean.
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