89 pointsby newer_vienna4 hours ago23 comments
  • mrDmrTmrJ3 hours ago
    To be clear, this is not a power-point program but a continuation of a long-standing design work with Bell.

    Two articles that cover this in depth are: 1. Revised Fold-Away Rotor Aircraft Concepts Emerge From Special Operations X-Plane Program. December 2024: https://www.twz.com/air/revised-fold-away-rotor-aircraft-con...

    2. Bell’s Plan To Finally Realize A Rotorcraft That Flies Like A Jet But Hovers Like A Helicopter. September 2021: https://www.twz.com/41997/bells-plan-to-finally-realize-a-ro...

    The second article covers decades of prior wind tunnel testing on the folding rotor concept.

    • moralestapiaan hour ago
      >decades of prior wind tunnel testing on the folding rotor concept

      Oof, I wish I had a job like that.

  • dmbche2 hours ago
    • 15 minutes ago
      undefined
    • yabones7 minutes ago
      The next generations of accidents are going to be even more looney-tunes in nature.
  • PowerElectronix3 hours ago
    It looks like a maintenance nightmare with those clutches to decouple the blades and the mechanisms to have them folded during cruising. Does it even improve substantially in anh metric over the V280 to put money into it?
    • cucumber37328423 hours ago
      The V280 is designed to be cheap (a very relative term here).

      Reading between the lines, I suspect "fast, but also expensive" was a design option that popped up and was not chosen earlier in the V280 program and now Darpa wants to pay to see where it goes.

      • Zigurd3 hours ago
        Hard to be more expensive than F-35B.
        • XorNot38 minutes ago
          The F-35 is cheaper then some new production 4th generation fighters at this point.
          • simonh11 minutes ago
            I've had to eat some humble pie and moderate my assessment of the F-35. It still does have a lot of issues, for sure, but it turns out if you divide an eye wateringly large number by another impressively large number, the result can be a lot better than I thought it would be.

            It's lot more about operational costs and project deliverables than plain sticker shock, and it is turning out to be a capable platform.

          • Zigurd14 minutes ago
            The sticker price is competitive but the cost per flight hour and the availability factor is pretty horrifying. Factoring in the cost of flying and the availability makes the Grippen about half the cost.

            I wonder if the flight hour cost of F 35 includes the maintenance it's undergoing when it's not available.

    • rluna8282 hours ago
      it also has stealth. This is a complete disaster. The only purpose of this stealth ship is to steal leaders and or go inside cave lairs and blow them up.
  • porphyra3 hours ago
    Cool, I guess this should be able to hover in much more "austere" environments than the F-35B STOVL and the Harrier Jet. Tiltrotor with folding rotor blades sounds very mechanically complex and challenging though.
  • brk40 minutes ago
    I don't understand the purpose of the Xenon taillight.
  • ceejayoz3 hours ago
    So it's an Osprey with a jet in the back?
    • torginus3 hours ago
      Usually with these programs, they just commission an artist with some vague description, like they tell him to draw a futuristic VTOL aircraft, these pics have zero bearing on what gets delivered.

      Sometimes they even take the piss with this, like in this video for a next-gen engine, where you can see their engine doesn't even fit in their fantasy aircraft:

      https://www.youtube.com/watch?v=vCHun6rxQm0

    • huflungdung3 hours ago
      [dead]
  • tamimio19 minutes ago
    I think the blades are added there for deception, most likely it won’t have blades.
  • ocdtrekkiean hour ago
    I'm confident with the stellar service and safety record of the V-22 that an even more complex tiltrotor will be a standout success for the military.
    • cpgxiii15 minutes ago
      If you look at the V-22 safety record in the context of the level of technical development, it is pretty good (e.g. compare to helicopters and aircraft from the 60s). The first production generation of a brand new type of vehicle is always going to be complicated, and virtually all of the V-22 mishaps come from the "new" components and procedures.

      The fundamental tradeoff with tiltrotor platforms is that you trade significantly increased speed for significantly increased complexity. What that means is your battlefield survivability goes up when dealing with any opponent with meaningful air defenses, but at the cost of increasing your "resting" accident rate when most peacetime accidents are consequences of maintenance and/or procedural issues.

    • wartywhoa23an hour ago
      16 hull losses per ~400 units built is not exactly a stellar safety record.

      Or I guess you mean /stellar?

      • jdkee44 minutes ago
        He is being sarcastic.
  • mikkupikkuan hour ago
    Why won't they adopt one of Sikorsky's compound helicopters already? They're beautiful and elegant solutions to this problem.
    • cpgxiii28 minutes ago
      Because Sikorski can't make them work. Sure, they can take off and fly fast in a straight line, but they haven't been able to demonstrate sufficient maneuverability due to vibration problems in the rotor head. They are also very tall, prohibitively so for existing shipboard hangar, which would otherwise seem to be their advantage over tiltrotor platforms.
  • kuprel2 hours ago
    From the image it doesn't look balanced for VTOL when the propellors are vertical. Also are the jets enabled during VTOL?
    • gorkish24 minutes ago
      I'm betting the person who created the "artist rendering" isnt an aeronautical engineer.
  • bilsbie3 hours ago
    So it has jet engines that blades unfold and attach to during takeoff and landing? Why not always use the blades?
  • bilsbie3 hours ago
    I’d go for simplicity and do a tail lander.
  • idontwantthis3 hours ago
    Isn't this need already met by the Bell V280 that the army already selected for it's Blackhawk replacement? What is the big innovation they are going for here?
    • Tuna-Fish3 hours ago
      +50% top speed over the V280. Bell offered it as an alternative to the V280 in the early stage of the contract, but it was judged too experimental (and probably too expensive). Apparently DARPA is funding further development of the concept.
  • dash24 hours ago
    “ With SPRINT, we're not just building an X-plane; we're building options”. Found the guy who couldn’t be bothered to write his own press release…
    • newer_vienna3 hours ago
      I'm quite fond of the caption, which describes a "a proof-of-concept technology demonstrator that aims to demonstrate technologies and concepts"
      • NitpickLawyer2 hours ago
        Brought to you by the Department of Redundancy Department.
    • irl_zebra3 hours ago
      I think I'd rather have them working on airplane tech rather than writing airplane tech press releases. With this approach, it's not just a tactical thing; it's relieving the burden of wordsmithing from technical people.
      • bigfishrunning3 hours ago
        The technical people were never wordsmithing, they just didn't hire a technical writer. Instead of freeing up someone to do more design work, it freed someone to interview for a new job. I hope they get it.
        • palmotea24 minutes ago
          > The technical people were never wordsmithing, they just didn't hire a technical writer. Instead of freeing up someone to do more design work, it freed someone to interview for a new job. I hope they get it.

          Do technical writers work on press releases? This sounds more like a job for the public relations/corporate communications department.

        • binkHNan hour ago
          It was a GPT.
          • irl_zebra32 minutes ago
            Or, at least, my take on GPT. :) I promise I am a human.
      • jdiez173 hours ago
        You're absolutely right.
    • notahacker3 hours ago
      Good to hear that the DoD's new contract with OpenAI is solving all the most important problems...
    • O5vYtytb3 hours ago
      It's a quote from someone...?
      • jdiez173 hours ago
        ... who probably wrote their prepared PR statement with an LLM.
        • esseph3 hours ago
          I have always talked/written like this. now that LLMs do it in a similar enough way, my own writing gets called AI slop. I just wish my rotator cuffs knew I was a robot.
          • irl_zebra2 hours ago
            It's probably good signal at least, if not a bit of a harsh thing to say that I don't mean in a bad way, that your writing was bland or mediocre since LLMs are basically regression to the mean.
          • jacquesm3 hours ago
            Skimping on the service again, are we?
            • 3 hours ago
              undefined
    • bigyabai3 hours ago
      It feels like DARPA has fallen so far. In a post-Salt Typhoon era it's really hard to imagine them as dynamic, best-in-class innovators anymore.
      • ambicapter2 hours ago
        This administration doesn't really prioritize anything that has to do with intelligence, so advanced research was obviously going to fall by the wayside.
  • crimsoneer2 hours ago
    Someone has played the new Deus Ex games
  • phplovesong3 hours ago
    The swedish gripen can do mach2 (2300km/h) and does not need a traditional runway (500 meters of something "flat enough" will do). I assume its way cheaper than something like this.
    • Zigurd3 hours ago
      I suppose the argument is that X-76 could work in environments without roads. But that also implies without fuel or any other support on the ground.
    • RandallBrown3 hours ago
      Can it hover?
  • greatgib3 hours ago
    I can't access darpa.mil. Was it slashdotted because of the article being posted here, or now it is unavailable outside of US?
  • HumblyTossed3 hours ago
    Hmmm... that just looks like problems. It's a lot of mechanical parts that always have to work correctly.
    • dangan hour ago
      "Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something."

      https://news.ycombinator.com/newsguidelines.html

    • 011000112 hours ago
      The Osprey killed a lot of Marines over the past decades. It took a while to work out the issues. Hopefully we will remember what the Osprey taught us.
  • thatmf3 hours ago
    [flagged]
    • bak3y2 hours ago
      hopefully we never will - the last thing I want the government MORE involved in is healthcare
      • vicnov2 hours ago
        It is a fascinating take. I am curious to understand what model you think would work.

        The U.S. effectively has a dysfunctional system with wild mix of "no regulation" and heavy state participation. I am not sure there is any country with a deregulated system where people can enjoy good healthcare. You could theoretically say that Switzerland does this, but the government there requires everyone to have insurance, even though hospitals are 100% private.

        • bak3y2 hours ago
          There's no magic wand fix to healthcare, it and the related insurance industry are incredibly busted.

          What I am dead certain of though is that involving the government in it will be worse, not better.

  • rluna8282 hours ago
    I wonder is Iran would have gone different if we had captured the Ayatollah instead of killing him. A stealth drop ship like this would have allowed that to happen. The reason why regimes are more likely to negotiate when you capture their leaders is because you might release them. (not a good day for the usurper.)
    • ivell2 hours ago
      I don't think whatever is negotiated with Iran's current regime would actually be honored by them. They may commit something to get their leader back, but won't be keeping the promises.

      Their self stated goal is destruction of Israel and US. They could have chosen peace and not have funded proxies across the middle east. Their choice of aggression by whatever means they have at their disposal just shows what their long term strategy would be.

      They have shown the intend. They just didn't have the capacity to follow through. Once they gain the capacity, they could go extreme lengths. Just see how they attacked their neighbors who were not party to the war.

      • jrapdx37 minutes ago
        A very good response to the parent comment and summary of the current situation.

        AIUI the Iranian attack on Arab countries is strategic, increasing energy costs pressures the US to stop military action. However the US and allies were prepared with set aside oil reserves, increasing supplies from other sources, and reducing Iran's ability to interfere with shipping.

        Major warfare always has tragic effects, but against regimes actively pursuing destruction of other nations, return of fire is a rational response.

    • otabdeveloper4an hour ago
      > A stealth drop ship like this would have allowed that to happen.

      Yeah, I saw that Agents of S.H.I.E.L.D. episode too.

      Sadly, we might need some more intensive vibranium research before it becomes reality.

  • sandworm1012 hours ago
    Different engines for different phases of flight? It has been tried many times and never really works. Such craft can be made to fly, but never well. The answer has to come from using one set to power all phases.

    Id be interested in seeing a turboprop that can transition to a turbofan/jet once the prop is folded away. The f-35 was a step in this direction.

  • trelliumD2 hours ago
    that already exists in the form of Saab Gripen :)
  • radicalethics2 hours ago
    I wonder what the motivation behind this is. Tactically, why ever show your latest weapon? What is the strategic purpose of this? It's like if I message my opponent in SC2 and tell them exactly what I'm going to tech to. That's ... insane right? Why would anyone do that?
    • benjcpalm2 hours ago
      It's not a tactical choice- it's strategic deterrence, and it's not insane at all!

      The US has always had a policy of messaging programs, with a lean toward classifying some percentage of the specific capabilities.

      There's a reason that F-35 program was publicized by the US government as the program was under development. It makes the US air force even scarier, which discourages adversaries from thinking about conventional warfare with America.

      That said- you won't see any detailed pics of the inside of an F35 cockpit, or a detailed look at the heads up display in the fancy helmet. That's top secret, because those making those details public don't offer enough additional deterrence to justify the risk to the program.

      • bityard2 hours ago
        Yes, but even if the US didn't release the specifications of the F35, other countries around the world would rapidly figure out most of the capabilities anyway from photos, videos, and casual observation. (In other words, they'd know soon enough WHAT it can do but not necessarily HOW it does it.)
      • 2 hours ago
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    • bityard2 hours ago
      This isn't a new weapon, this is a test platform for various ideas, none of which are new or secret. Also, there are not many groundbreaking advancements left in military aviation. Most are just fairly incremental engineering or manufacturing improvements. (Military space technology might be a different story, though.)

      The only other nation with the potential to develop a high-tech military plane that could rival US technology would be China. But if we ever got into a war with China, they wouldn't need superior technology to win. They could win via superior manufacturing capacity and the sheer number of people they can draft into service at a moment's notice.

      • logicchains24 minutes ago
        >They could win via superior manufacturing capacity and the sheer number of people they can draft into service at a moment's notice.

        Even with their manufacturing capacity they don't have remotely enough boats to get a nontrivial fraction of those people to the US mainland, and the majority of those people can't swim, so they wouldn't help in taking the US mainland, a requirement to "win" a serious war. Their entire armed forces is also almost completely lacking in combat experience, and in their last skirmish (against some unarmed Indian soldiers in the mountains) 30+ soldiers Chinese tragically drowned, due to the aforementioned lack of swimming ability.

      • foobarian2 hours ago
        They could just cease all shipping. The consequences would be legendary.
    • Alan_Writer2 hours ago
      I think they just show what it can be seen, like any country with advance military developments.

      They won't show you everything.

      Have you ever heard about those sound/sonic (or something similar) weapons the US used in Maduro's kidnap operation? Venezuelan soldiers said (pero some publications on the internet) that they never saw anything alike, leaving them completely disoriented and helpless?

      Soldiers now can even see thermal figures through walls or solid materiales, and the same time, bacome invisibles.

      It's more than sci-fi.