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The Military United States

US Air Force Launches First Operational Hypersonic Missile (space.com) 102

The United States Air Force (USAF) has successfully tested its first prototype hypersonic missile. Space.com reports: The service's new AGM-183A Air-launched Rapid Response Weapon, or ARRW ("Arrow") is expected to be the United States military's first hypersonic weapon to reach operational status. The exact speed of the AGM-183A isn't known, although the Lockheed Martin-designed weapon is said to be based on previous test vehicles built by DARPA that have an alleged maximum speed of Mach 20, or 15,000 mph (24,000 kph). The successful ARRW test was conducted on Friday (Dec. 9) in a training range off the coast of California, according to a USAF statement released Monday (Dec. 12). "This test was the first launch of a full prototype operational missile," officials wrote in the statement. "Following the ARRW's separation from the aircraft, it reached hypersonic speeds greater than five times the speed of sound, completed its flight path and detonated in the terminal area. Indications show that all objectives were met."

According to the U.S. Air Force, the missile is designed to "hold fixed, high-value, time-sensitive targets at risk in contested environments," meaning it will be used to target pre-determined assets on the ground such as fixed missile sites, radar stations, air defense installations, infrastructure facilities or even adversary headquarters buildings -- basically anything important in a battlefield environment that can't be moved and needs to be destroyed quickly. [...] Now that the ARRW has successfully flown, it's likely the service could reevaluate its plans to scrap planned purchases of the AGM-183A. The AGM-183A is what is known as a boost-glide vehicle, which refers to warheads or projectiles that glide toward their targets after being lofted by a rocket booster.

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US Air Force Launches First Operational Hypersonic Missile

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  • Static targets? (Score:5, Insightful)

    by AmiMoJo ( 196126 ) on Tuesday December 13, 2022 @03:10AM (#63126532) Homepage Journal

    TFA says it is for static targets like buildings. Isn't the point of a hypersonic missile, aside from being hard to shoot down, that it can hit mobile targets where their location days quickly becomes stale?

    Say you spot a ship. By the time aircraft or conventional missiles arrive it could be long gone, but with a hypersonic missile with terminal guidance it can't get very far in the minutes it has to escape.

    Similarly if you know a person is at a particular location you can blow them up before they have a chance to leave.

    • Re:Static targets? (Score:5, Interesting)

      by CaptQuark ( 2706165 ) on Tuesday December 13, 2022 @03:19AM (#63126546)

      The ARRW is a conventional, boost-glide, hypersonic weapon consisting of a solid rocket motor booster, a glider protective shroud, and a glider vehicle containing a kinetic energy projectile warhead. A standoff air-to-ground missile launched from a B-52H aircraft, the ARRW is intended to attack high-value, time-sensitive, land-based targets.

      Imagine a titanium javelin traveling at Mach 20 which is aimed directly toward the target. The small radar cross section would be like trying to see a crossbow bolt aimed at your head. Conventional missile defense systems wouldn't even get a lock on the projectile before it was at the target. And almost zero collateral damage due to the kinetic energy being released in a very confined area.

      But because it's a kinetic weapon, it probably has very little last-minute maneuverability if the ship turns hard just before impact.

      • Re:Static targets? (Score:5, Informative)

        by sfcat ( 872532 ) on Tuesday December 13, 2022 @03:56AM (#63126586)
        This type of missile is called a hypersonic glide vehicle which means it is a cruise missile (the type that fly low to the ground and can turn and change course) that travels fast enough to make it very hard to shoot down. The idea of this type of weapon is that it can change course to avoid SAM sites and other obstacles allowing it to hit targets in protected airspace (protected by networks of SAMs). What this specific missile can do, I have no idea. I am sure that is classified. But the point of this weapon is that it takes off, attains a high altitude, uses gravity to increase its speed to something absurd (like Mach 10 or 20) and then flies low to the target too fast to be defended against by traditional means (anti-missile air defense systems). I heard that the US actually developed this type of weapon in the 1970s originally but the missiles were to cost $100,000,000 each and and much slower and cheaper missiles were just as effective back then. Today, you need that extra speed to make sure your cruise missile doesn't get intercepted by a SAM. I didn't see anything about the warhead being kinetic (meaning no explosives) but if your missile is moving at Mach 20, I'm not sure a few kg of explosives really makes any difference. I did see something about this being for static targets which probably means it isn't receiving targeting adjustments in flight yet. Expect that to be next.
        • it is a cruise missile (the type that fly low to the ground and can turn and change course)

          I expect a hypersonic glide vehicle has to operate at high altitude to minimize the speed loss due to drag. It's more likely the missile will stay at high altitude for as long as possible, then do a diving attack.
          Conventional cruise missiles can fly at low altitude because they're powered by a jet engine.

          • by sfcat ( 872532 )
            No, that would be a ballistic missile and they have existed for decades. The challenge of making a hypersonic glide vehicle is making it fly low, fast and being able to maneuver all at the same time. At the very end of their flight, they can go up high for a top attack if desired but at that point they only go up to a few 1000 ft, not the multiple miles up like at the beginning of their flight. I don't believe these missiles use normal jets, but instead use a scramjet or a ramjet. Usually they are also
        • Static targets make sense because of the ionized air around a hypersonic missile - kind of hard for radio signals from a command center, or even GPS signals - to penetrate. So you want to depend on an inertial guidance system.

          Which is why Russia's hypersonic missiles are a joke - they don't have the ability to build accurate enough inertial guidance systems any more. Their CEP [wikipedia.org] not that great - when they work. 1 out of the 4 they launched so far hit Russia.

      • They are shrouded in plasma which make sensors ineffective, their control surfaces are not capable of making major last minute changes in direction (if they were they would slow it down), the time from beyond horizon to impact (e.g. 25 km) is 3.75 seconds -- so there is not much time to adjust to a change in the position of a target if you had sensors.
    • Re:Static targets? (Score:5, Interesting)

      by phantomfive ( 622387 ) on Tuesday December 13, 2022 @03:45AM (#63126574) Journal

      The point of a hypersonic missile is to be able to evade anti-missile defense.

      Practically speaking, the Ukraine war has shown that potentially adversarial targets don't have an effective missile defense against slower cruise missiles, so there isn't any particular urgency for building these missiles.

      For a ship, any missile can use radar for targeting (or infrared, but hypersonic missiles probably can't use infrared because they are too hot), and adjust its path accordingly.

      • Re:Static targets? (Score:5, Insightful)

        by quonset ( 4839537 ) on Tuesday December 13, 2022 @07:40AM (#63126820)

        Practically speaking, the Ukraine war has shown that potentially adversarial targets don't have an effective missile defense against slower cruise missiles, so there isn't any particular urgency for building these missiles.

        Say what? The German Flugabwehrkanonenpanzer Gepards are doing a fantastic job of shooting down both cruise missiles and Iranian drones. The same with the German IRIS-T system which is being used for the first time in a real combat situation.

        The U.S. has provided the Avenger, NASAMS, and Aspide systems, among others, which are fulfilling their roles. Other countries are doing their part to help Ukraine defend its skies.

        Is any air defense perfect? No. But to say there is no effective defense against cruise missiles is patently false.

        • the Ukraine war has shown that potentially adversarial targets don't have an effective missile defense against slower cruise missiles

          to say there is no effective defense against cruise missiles is patently false.

          Yes, but it's also not what GP said. You ignored key parts of that sentence.

        • by Slayer ( 6656 )

          These are all great systems for air defense, but 10+% of Russian cruise missiles still made it through, killing almost the entire Ukrainian energy distribution system in the process. Even these pathetic Shahed mopeds still hit their targets in surprising numbers and frustrating regularity.

          The real question should have been "is it cheaper to build and launch X regular cruise missiles, or one hypersonic cruise missile?". The answer to this question seems to have moved towards "one hypersonic cruise missile",

          • The newest cruise missiles cost $2million a piece, [wikipedia.org] which means you can launch a lot of them for the price of one hypersonic missile.

          • " is it cheaper to build and launch X regular cruise missiles, or one hypersonic cruise missile?"

            Depends on the target.

          • The real question should have been "is it cheaper to build and launch X regular cruise missiles, or one hypersonic cruise missile?".

            Not for a nation such as the USA. It is more about optics of the situation in the media.

            Firing one missile that destroys one specific target (perhaps a particular laboratory building in Iran...) vs firing a barrage of missiles that may cause damage across a wide area (including schools and hospitals) -as Russia has done to Ukraine.

            To be honest... the real reason for the US to build and test hypersonic missile capability is to show that we are keeping up with the Joneses (aka China). They definitely have t

        • to say there is no effective defense against cruise missiles is patently false.

          That's not what I said.

        • Practically speaking, the Ukraine war has shown that potentially adversarial targets don't have an effective missile defense against slower cruise missiles, so there isn't any particular urgency for building these missiles.

          Say what? The German Flugabwehrkanonenpanzer Gepards

          Wait? The anti-missile gun is called a Flugabwehrkanonenpanzer [wikipedia.org]?

          By the time you finish yelling "Fire the Flugabwehrkanonenpanzer!" the airstrike will be over!!

      • The point of a (US) hypersonic missile is to close the mineshaft gap with claimed Russian hypersonic missiles. As long as Russia can be induced to spend its limited resources on those things, the US can churn out a fuckton of M795s and M982s and similar, which is what's really needed on the battlefield, not a few hypersonic whizbangs.
        • The point of a (US) hypersonic missile is to close the mineshaft gap with claimed Russian hypersonic missiles. As long as Russia can be induced to spend its limited resources on those things, the US can churn out a fuckton of M795s and M982s and similar, which is what's really needed on the battlefield, not a few hypersonic whizbangs.

          hypersonics can be used to take down missile defense and then conventional missiles take down the air defense and then planes take down the ground defense and then artillery takes down whats left and the Steph climbs on top of Dray an launches an unblockable shot at the the Kremlin.

      • Re:Static targets? (Score:4, Insightful)

        by DrSpock11 ( 993950 ) on Tuesday December 13, 2022 @09:31AM (#63126984)

        Practically speaking, the Ukraine war has shown that potentially adversarial targets don't have an effective missile defense against slower cruise missiles, so there isn't any particular urgency for building these missiles.

        As quonset replied, this is patently not true as air defense has proven highly effective in Ukraine. But I'd also add that there most definitely is a place for a weapon like this. For example, the Kerch Strait Bridge is defended by multiple Russian S-300 missiles systems. It is dubious traditional missiles would be able to hit it. But a hypersonic traveling at Mach 20? That could do some serious damage and it would be impossible to defend against.

        • S-300 systems in Ukraine have proven vulnerable to anti-radar HARM missiles [wikipedia.org]. Russia has the S-500 system which is designed to destroy missiles, but they don't have many of those (and they haven't been tested much in real-world conditions, the way Israeli Iron Dome has).

    • I understand it is a first strike advantage.

      "Sir, we are monitoring the area and have been for weeks. It appears they are readying to launch an attack"
      "Go forward with operation Mach 20 soldier"
      "Yes sir"
      "They are are no longer readying to launch an attack sir"
    • No. Conventional missiles are much faster than ships. Aircraft are faster than ships. If you are targeting an individual you have a spotter verify their location until the strike.

      Hypersonic missiles are valuable because they move too fast for anti-missile systems to shoot them down.

  • by istartedi ( 132515 ) on Tuesday December 13, 2022 @03:29AM (#63126558) Journal

    Either they've had it for a while and are just now telling us, or they didn't have it and have been burning the midnight oil the past few months because IIRC it was announced that China had them not that long ago.

    With military stuff, you never really know unless you know, then you can't say, unless you can.

    • by Anonymous Coward on Tuesday December 13, 2022 @06:22AM (#63126746)

      Well, the whole hypersonic moniker is a mess anyway. Russia for example claims it's launched hypersonic missiles at Ukraine, this is technically true because some of it's Kinzhal missiles have breached Mach 5 before hitting Ukraine, but the missiles are just air launched versions of their previous land based 9K720 Iskander SRBMs. The fact they've strapped them to a plane to give them greater starting altitude to eventually achieve a higher speed due to greater descent time and fuel needed for acceleration not burnt ascending isn't exactly a meaningful technical advancement. By that same definition even existing common US missiles are hypersonic, the AGM-88 HARM has often broken Mach 5 as it descends towards a target after being lofted, but the US never called it a hypersonic missile like Russia does Kinzhal because Russia's doctrine is to feign technical superiority where it has none.

      The reason China's missile test ruffled feathers was because it seemed to be a genuine technical advancement - it could maintain hypersonic speeds are more interesting trajectories than just falling out the sky + acceleration, and the hypersonic speeds it could reach more than just about scraped Mach 5 like Kinzhal etc. This is the same sort of thing the US is looking for, and that's really the difference. Russia hasn't got a true hypersonic missile in the sense of the type of programme we're talking about here, it just has things that can just about technically scrape the moniker if you tilt your head and squint at it at a little bit. China has a true hypersonic system, though it's worth nothing despite the technical advancement they demonstrated with it, it still missed it's target by 20 miles.

      So the real challenge is who can produce a missile that is both capable of and can maintain mid to high hypersonic, that can manoeuvre whilst maintaining hypersonic speeds, and importantly, can still actually hit the fucking thing it's aimed at. Currently no one has that.

      The Ukraine war has shown the significant gap in precision between Russian arms and Western arms fired by Ukraine, whilst Russian missiles are missile by miles at times, missiles like the HIMARS launched have been hitting targets like bridges with sufficient precision that they were able to put holes in a line down one side of the road on the bridge only. Given Chinese tech is largely just a follow on from Russian tech I suspect despite all the hype about Russian/Chinese hypersonic missiles it'll still be the US that delivers a true hypersonic missile that can actually hit it's target operationally first.

      • This is why I always read below 1.

        Great post, thanks.

        • This is why I always read below 1.

          Great post, thanks.

          This is also why the NSA NLPbots always read all Internet traffic at -273. So anyone posting useful information "anonymously" can be indexed in case later risk-assessment becomes warranted. It's not about whether the information itself is publicly available or not, it's that someone who both possesses and clearly understands certain categories of information should be fingered at some non-zero level for various purposes.

      • China has a true hypersonic system, though it's worth nothing despite the technical advancement they demonstrated with it, it still missed it's target by 20 miles.

        Do you have a citation for that?

    • I can tell you, but then I would have to kill you.
  • There is always enough money to buy a whole stockpile of these babies!
    The psychological thrill however is how to fire your hyper rocket after the enemy launched theirs.
    By the time you hear the sonic boom, the rocket already punched a hole in your roof. =/

    • Re: (Score:2, Funny)

      by sfcat ( 872532 )

      The psychological thrill however is how to fire your hyper rocket after the enemy launched theirs.

      It is called radar and these missiles don't travel at the speed of light.

    • AT 175 million a pop, the Iranians can make 8750 of their $20k drones. Sure, maybe you can't shoot down the missile. But I'll bet the drones are more destructive.

  • It's a technical hurdle that can be overcome. Throwing a cloud of BBs in front of it, at the speed it travels, could probably fuck it up if it hit one.

    • Re: (Score:2, Insightful)

      by CaptQuark ( 2706165 )

      Not really. It would be like a crossbow bolt going through cloud of salt.

      For example: the energy of TNT is 4.6MJ/kg, and the energy of a kinetic kill vehicle with a closing speed of 10km/s (22,000mph) is 50MJ/kg. For comparison, 50MJ is equivalent to the kinetic energy of a school bus weighing 5 metric tons, traveling at 316 mph (509km/h; 141m/s). A cloud of BBs wouldn't even be noticed.

      • by AmiMoJo ( 196126 )

        You seem to be saying that a 100g ball bearing would transfer 5MJ of energy to the hypersonic missile if it crashed into it.

        I think more likely the ball bearing would be thrown out of the way by the shockwave as the module forces air out of its way. And probably melt too.

        • Comment removed based on user account deletion
        • You seem to be saying you don't understand a thing that I said. The speed and kinetic energy of the kinetic payload would pass through a cloud of BBs like they weren't even there. I used the analogy of firing a crossbow bolt through a cloud of salt particles to illustrate the relative kinetic energy of the hypersonic payload to the effect of the BBs.

          Your summation of the effect is exactly the same as what I said. The BBs would have no effect on the missile.

      • Not really. It would be like a crossbow bolt going through cloud of salt.

        For example: the energy of TNT is 4.6MJ/kg, and the energy of a kinetic kill vehicle with a closing speed of 10km/s (22,000mph) is 50MJ/kg. For comparison, 50MJ is equivalent to the kinetic energy of a school bus weighing 5 metric tons, traveling at 316 mph (509km/h; 141m/s). A cloud of BBs wouldn't even be noticed.

        In that case, defensive measures are even more trivial. Just hire Sandra Bullock to drive a school bus at >50mph up a highway ramp and across a gap that brackets your country's valuable military targets. That way the ballistic penalties offset and both countries have to go back and repeat the 1st down.

        Slashdot has really gone downhill: I swear sometimes it's like you guys have never performed rocket sportsball surgery before.

    • by Tailhook ( 98486 )

      It's a technical hurdle that can be overcome.

      Maybe. Either way the cost of developing your supposed countermeasure is a burden the enemy must bear. That's why being prosperous is important.

  • OWCA (Score:5, Funny)

    by cascadingstylesheet ( 140919 ) on Tuesday December 13, 2022 @08:13AM (#63126862) Journal

    The service's new AGM-183A Air-launched Rapid Response Weapon, or ARRW ("Arrow")

    The Organization Without a Cool Acronym (OWCA) was unavailable for comment.

    • The Organization Without a Cool Acronym (OWCA) was unavailable for comment.

      Ok, now that's just funny!!

      Hope you don't mind..I'm gonna steal this one from ya to use myself.

      :D

    • Make sure to inform the AAAAA*.

      *American Association Against Acronym Abuse

  • Operational? Prototype? Which is it? Can't be both.
    • by cusco ( 717999 )

      If this is the first successful test of the prototype they're at least a decade away from having a functional weapon, which allows time for a **LOT** of mission creep. I fully expect this to turn into the next F-35, something claimed to be all things to all people but which is really incapable of doing even its most basic job.

    • This is not exactly all new technology. Fast missiles have been around in various forms for half a century. Therefore the deployment can be quicker than some would expect.
    • Operational? Prototype? Which is it? Can't be both.

      You've never built a prototype and put it into operation? That's what you usually do with a prototype, or proof of concept, as opposed to a static display model.

      If you don't put it into operation, how do you know if it works?

      • by richi ( 74551 )
        Now now. That's not what "operational" means. And I'm pretty sure you know it.
    • Operational? Prototype? Which is it? Can't be both.

      It certainly can, though not for long, since it's a missile.

  • 1975 called, they want their Sprint missile back. https://en.m.wikipedia.org/wik... [wikipedia.org]

    Yes I know this operates much differently, but the footage of the old sprint missile launches give an idea how incredibly fast this thing must is.
  • Artemis reached what, 25000 mph.
  • That's a faster missile that can destroy buildings into finer rubble than before? Yay. Now, how are those sharks with lazer beams on their heads coming along?

    Honestly I'm not sure what's the point. There will be no war with countries that can develop comparable weaponry, like Russia or China. Or, if there is one, it will be a nuclear one where we all die. The wars that do take place, against minor nations very soon become not about fancy gadgets but about boots on the ground, ugly low-tech asymmetric warfar

  • I'm not sure what is news about this.

    Ballistic missiles have been hypersonic for decades.
  • ... Russian one which was basically a $100M sojuz going sideways...
  • This is great news, what the world really needs is more advanced weaponry.

  • I wonder how long it takes at mach 20 - or even mach 10 - for it to start melting from air friction.

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