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The US And Australia Are Testing Hypersonic Missiles (engadget.com)
schwit1 quotes Engadget:
Both the U.S. and Australia have confirmed that they recently completed a series of mysterious hypersonic missile tests. All the countries will say is that the flights were successful, and that they represented "significant milestones" in testing everything from the design assembly to the control mechanisms. They won't even say which vehicles were used or how quickly they traveled, although past tests have usually relied on Terrier Orion rockets and have reached speeds as high as Mach 8.
The tests are part of the long-running HIFiRE (Hypersonic International Flight Research Experimentation) program, whose first launch took place way back in 2009. They should help bring hypersonic flight to a "range of applications," according to HIFiRE partner BAE. That could easily include ultra-fast aircraft, but it's widely believed the focus here is on missiles and similar unmanned weapons. A hypersonic missile would fulfill the US military's goal of building a conventional weapon that can strike anywhere within an hour, and it would be virtually impossible to stop using existing missile defenses. In theory, enemy nations wouldn't dare attack if they knew they'd face certain retaliation within minutes.
Originally NASA was involved in the project, which has been ongoing for more than eight years. But it's timeline may have shortened after reports that foreign powers including Russia and China are already building their own hypersonic missiles.
The tests are part of the long-running HIFiRE (Hypersonic International Flight Research Experimentation) program, whose first launch took place way back in 2009. They should help bring hypersonic flight to a "range of applications," according to HIFiRE partner BAE. That could easily include ultra-fast aircraft, but it's widely believed the focus here is on missiles and similar unmanned weapons. A hypersonic missile would fulfill the US military's goal of building a conventional weapon that can strike anywhere within an hour, and it would be virtually impossible to stop using existing missile defenses. In theory, enemy nations wouldn't dare attack if they knew they'd face certain retaliation within minutes.
Originally NASA was involved in the project, which has been ongoing for more than eight years. But it's timeline may have shortened after reports that foreign powers including Russia and China are already building their own hypersonic missiles.
While options might in principle be a good thing, how is this particular weapon system anything other than destabilizing? Short hang time, hair-trigger.
We already have hypersonic missiles, they're called ICBMs (US Trident 3) and MRBMs. Launch one, any everybody watching assumes multiple incoming thermonukes. With the new toys, it might just be conventional explosives. That's going to make anyone abandon "launch-on-warning"? Least of all the US!
Consider the current crop of countries the US considers [potential] hot-war enemies: Would hypersonics keep the Russians out of Ukraine, let alone Crimea? The Chinese off the Pacific sandbanks? The NorKs from developing missiles? ISIS out of Raqqa? Iran from developing nukes? Short-fuse helps _none_ of these situations, and it is tough to think of one which it would.
Existing ICBMs are hypersonic on entry. This is being considered something new because it is hypersonic through atmosphere while still under propulsion. That requires a lot more fuel than coasting through space and letting gravity pull you in. This could not hit "anywhere" in minutes because it wouldn't have enough fuel to go through that much atmosphere. It is an advance in short to perhaps medium range missile technology in that it is fast enough to get to a plane or from a submarine to a target before a response can be made.