Slashdot Mirror


German Laser Destroys Targets More Than 1Km Away

kkleiner writes "A German company has brought us one step closer to the kinds of shootouts only seen in Sci-Fi films. Düsseldorf-based Rheinmetall Defense recently tested a 50kW, high-energy laser at their proving ground facility in Switzerland. First, the system sliced through a 15mm- (~0.6 inches) thick steel girder from a kilometer away. Then, from a distance of two kilometers, it shot down a handful of drones as they nose-dived toward the surface at 50 meters per second."

38 of 338 comments (clear)

  1. Pop Corn by bkmoore · · Score: 4, Funny

    But can it wreck a college professor's house full of pop corn?

    1. Re:Pop Corn by Anonymous Coward · · Score: 5, Informative

      So how well does it make popcorn?

      Sheesh, and you people have the nerve to call yourselves nerds. A quick back of the envelope calculation:

      Laser output: 50kW
      Average microwave oven: 1kW
      Duration of popping: 2 m. 30 sec. = 150 sec.
      Therefore, 1 bag of popcorn every 3 seconds.

      House volume: 2000 sq ft * 6 ft high = 12000 cu ft
      Volume of a bag of popcorn = 0.25 cu ft
      Therefore, 144k bags of popcorn would be needed.

      (144k bags * 3 sec per bag) / 3600 secs per hour = 120 hours

      Hope Val Kilmer isn't in a hurry.

    2. Re:Pop Corn by steelfood · · Score: 4, Funny

      So instead of dropping bombs, the enemy will just drop disco balls. That ought to be fun.

      --
      "If a nation expects to be ignorant and free in a state of civilization, it expects what never was and never will be."
    3. Re:Pop Corn by Hobadee · · Score: 5, Funny

      A 6' high ceiling? Where are you living, the Shire?

      --
      ...Had this been an actual emergency, we would have fled in terror, and you would not have been informed.
    4. Re:Pop Corn by Sez+Zero · · Score: 3, Funny

      Get that shit away from me. I can't stand it.

      Now I know you what to get for your birthday. When is AC's birthday, anyway? 1/1/1970?

    5. Re:Pop Corn by lymond01 · · Score: 4, Insightful

      Therefore, 1 bag of popcorn every 3 seconds....(144k bags * 3 sec per bag) / 3600 secs per hour = 120 hours

      Because I'm aiming my laser at each bag individually. If I were going to cook a room-sized tin of kernels, I'd disperse the heat using a stained glass window.

      I drank what?

    6. Re:Pop Corn by TheInternetGuy · · Score: 3, Funny

      So how well does it make popcorn?

      Sheesh, and you people have the nerve to call yourselves nerds. A quick back of the envelope calculation:

      Laser output: 50kW Average microwave oven: 1kW Duration of popping: 2 m. 30 sec. = 150 sec. Therefore, 1 bag of popcorn every 3 seconds.

      House volume: 2000 sq ft * 6 ft high = 12000 cu ft Volume of a bag of popcorn = 0.25 cu ft Therefore, 144k bags of popcorn would be needed.

      (144k bags * 3 sec per bag) / 3600 secs per hour = 120 hours

      Hope Val Kilmer isn't in a hurry.

      Would that be metric hours?

      --
      If my comment didn't sound as good in your head as it did in mine, then I guess we all know who's to blame
    7. Re:Pop Corn by plopez · · Score: 3, Informative

      Yes. Seconds are part of the official SI standard. That makes hours "metric". You basically blew any geek cred with that question.

      --
      putting the 'B' in LGBTQ+
    8. Re:Pop Corn by celle · · Score: 4, Funny

      "It has come to my attention that the entire Linux community is a hotbed of so called 'alternative sexuality', which includes anything from hedonistic orgies to homosexuality to paedophilia."

            You know you could have waited till April 1st and won an award. Posting now is just plain stupid.

    9. Re:Pop Corn by thewils · · Score: 5, Funny

      Grammar Nazis!

      --
      Once I was a four stone apology. Now I am two separate gorillas.
  2. Now we need flintsteel armor. by Anonymous Coward · · Score: 4, Interesting

    Does anyone else think of the Bolo books when reading this.

    1. Re:Now we need flintsteel armor. by fyngyrz · · Score: 3, Informative

      Dinochrome. For the honor of the regiment.

      --
      I've fallen off your lawn, and I can't get up.
  3. Sharks? by macraig · · Score: 4, Funny

    Why did they test it in a country where there are no sharks?

  4. Shoot down? by Lewie · · Score: 3, Insightful

    How do you shoot down something that is already nosediving?

    --
    This sig washed every five years whether it needs it or not!
  5. Oooh shiny!!! by kimgkimg · · Score: 4, Funny

    I predict a mirrored future for our military vehicles...

    1. Re:Oooh shiny!!! by SirGarlon · · Score: 3, Interesting

      That might be harder than you think. No reflective material is perfect: they would all absorb some heat from the laser. So you'd need a material that retains its reflectivity at high temperature. I'm not saying it can't be done, I'm saying it would be a technology race between the reflective materials and the high-energy lasers.

      --
      [Sir Garlon] is the marvellest knight that is now living, for he destroyeth many good knights, for he goeth invisible.
  6. Germans acquire an advanced weapon! by Kensai7 · · Score: 5, Funny

    What can possibly go wrong...?! :p

    --
    "Sum Ergo Cogito"
    1. Re:Germans acquire an advanced weapon! by ClayDowling · · Score: 3, Funny

      Once all the Germans were warlike and mean,
      But that couldn't happen again.
      We taught them a lesson in nineteen eighteen,
      And they've hardly bothered us since then.

      Tom Lehrer, Mlf Lullaby

    2. Re:Germans acquire an advanced weapon! by KiloByte · · Score: 3, Funny

      Most of us Polacks who are not elderly or nationalist are already in Ireland, UK, or, well, Germany, so you can take the old piece of dirt if you want.

      --
      The creatures outside looked from Alt-Right to Antifa; but already it was impossible to say which was which.
  7. Great use for it. by Nyder · · Score: 4, Insightful

    Shooting down drones. Sort of like one of them electric bug zappers, but for bigger bugs.

    --
    Be seeing you...
  8. Re:wake me up.. by aliquis · · Score: 3, Funny
  9. I guess I was naive by davidwr · · Score: 3, Interesting

    I figured if a laser's very tight-column beam was so close to "perfect" that if it could destroy something at 10 meters, it could destroy or at least severely damage it at 1,000 meters, at least in a vacuum.

    Perhaps I should be impressed that 1 km of atmosphere didn't disrupt the laser enough to disable its destructive power. Next time, try 1km of fog or 1km of Beijing smog.

    --
    Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
    1. Re:I guess I was naive by wile_e_wonka · · Score: 4, Informative

      The article seems to suggest that the laser was not simply going through air:

      "[W]eather at the Ochsenboden Proving Ground in Switzerland where the demonstration was carried out included ice, rain, snow, and extremely bright sunlight – far from ideal."

  10. Re:50 m/s = 180 km/h = 111.85 mph by Anonymous Coward · · Score: 3, Interesting

    Why do people still use non-metric system?

  11. Godzilla by sycodon · · Score: 3, Insightful

    Lastly, they’ll begin making these high-energy laser systems mobile by mounting a laser onto a TM170 armored vehicle.

    Godzilla doesn't stand a chance now!

    --
    When Fascism comes to America, it will call itself Anti-Fascism, and tell you to give up your guns.
  12. American translation by Anonymous Coward · · Score: 3, Funny

    50 m/sec is 894.776 furlongs/sec for y'all in the US. :)

    1. Re:American translation by GoogleShill · · Score: 5, Funny

      The preferred unit is furlongs/fortnight you insensitive clod!

  13. If true, low-level warplanes just became obsolete by dtjohnson · · Score: 3, Interesting

    This kind of weapon would be an incredible boost for air defense, at least for close-in ground support and other low-level attacks. It wouldn't do much against artillery shells or naval gunfire. It would also likely allow the development of a laser-based missile defense system far superior to a patriot system. If these things come to pass, the balance of power would shift away from nations with a heavy emphasis on air power (i.e. the U.S. with its aircraft carriers and air force) towards nations with large and mobile ground forces.

  14. Re:Two words by K.+S.+Kyosuke · · Score: 4, Funny

    Actually, after you say "two words", you've already exhausted your word quota.

    --
    Ezekiel 23:20
  15. Re:If true, low-level warplanes just became obsole by dpidcoe · · Score: 4, Insightful

    It wouldn't do much against artillery shells or naval gunfire.

    It would be somewhat effective against artillery shells. Most large shells travel slowly and rely on explosives for their damage. Heat one up enough and you'll either bork the fuse or set off the explosives prematurely. Now you've got non-aerodynamic shrapnel with a relatively low terminal velocity raining down rather than a high explosive shell.

    The other thing about slow moving artillery shells is that they're slow, so there's time to effect the flight path. Heat the metal enough and you'll have superheated metal gas ablating from the surface of the shell. The force from that will be enough to alter the course of the projectile. With enough tracking/accuracy, you could theoretically divert the shell to land somewhere harmless (or at least less damaging).

  16. German Laser Destroys Targets More Than 1Km Away.. by fotoguzzi · · Score: 3, Funny

    ...from where it was aimed.

    --
    Their they're doing there hair.
  17. Obvious. by Forty+Two+Tenfold · · Score: 5, Insightful

    Sharks.

    --
    Upward mobility is a slippery slope - the higher you climb the more you show your ass.
  18. Still too weak by cheesybagel · · Score: 4, Interesting

    100 kW is considered to be militarily useful, 1 MW is considered to be a battle grade laser.

    There are 100 kW solid state lasers available to the US military so this is not exactly leading edge military laser power. The interesting bit about this article is the revolver design they used.

  19. Re:If true, low-level warplanes just became obsole by X0563511 · · Score: 3, Insightful

    Oh yea, it's so easy to put a power plant underground.

    Fine then, you can just find the exhaust points and blow those up. Any significant power installation is going to put out a lot of heat, and blocking that heat from being removed is going to cause some serious issues for said installation.

    --
    For large sets, this will be our guide even unto death, for the LORD will work for each type of data it is applied to...
  20. Re:50 m/s = 180 km/h = 111.85 mph by Jetra · · Score: 5, Insightful

    Because people in America are stubborn, arrogant, and resistant to change.

  21. Re:it had to be said by _4rp4n3t · · Score: 5, Funny

    I assume you mean 'pew-pew', unless you are, for some reason, particularly relieved at the successful testing of this laser...

  22. Re:50 m/s = 180 km/h = 111.85 mph by Sique · · Score: 3, Insightful

    The metric system was adopted in most of Europe on May 20 1875 (the so called Metre Convention) - not a time famous for widespread french occupation.

    --
    .sig: Sique *sigh*
  23. Re:50 m/s = 180 km/h = 111.85 mph by Sique · · Score: 3, Insightful

    To add insult to injury, the U.S. was a signee of the Metre Convention of 1875.

    --
    .sig: Sique *sigh*