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Truck-Mounted Laser Guns

bl8n8r writes "Boeing has announced a contract with the US Army to develop laser cannons that are to be mounted atop 20-ton trucks for the purpose of shooting down incoming artillery, rockets, mortars, or bombs. The High Energy Laser Technology Demonstrator project actually shoots stuff instead of just painting a mark on a target for other armament to hit."

370 comments

  1. I'm so proud by UncleWilly · · Score: 4, Funny

    to be an American

    Next put them in C-130s, or Jeeps, like Rat Patrol.

    1. Re:I'm so proud by Eternauta3k · · Score: 3, Informative

      Most materials aren't reflective enough, the people who make laser etching machines can tell you how even the best mirrors (gold, polished to under a 1/4 wavelength) are only 80% reflective. That means 20% is being absorbed as heat. With enough power, you could burn through anything.

      --
      Yeah. Would you choose a neurosurgeon who pokes around people's brains in his spare time? I wouldn't.
    2. Re:I'm so proud by R3d+M3rcury · · Score: 2, Interesting

      ...before or after it manages to hit the ground?

      That's the tricky part. You have limited time in which to do this. Also, while I'm not an expert in this stuff, I assume that if you have the mortar spinning, it would be difficult to heat one point to cause a failure.

      Once again, I'm not an expert on this stuff and I may be wrong. That said, here's my strategy for defeating one of these: Fire a group of spinning and reflective mortars followed closely by a larger group of "regular" mortars. At worst, the laser will spend more time destroying the reflective mortars and allow the regular mortars to get through. Firing the reflective and "regular" mortars from opposite sides of the compass might also be useful.

      The unknowns would be how effective spinning and reflective painting would be against this laser and how many mortars would you have to fire to overwhelm the system. Also, to solve this problem you just deploy more of the trucks. After all, we have unlimited tax dollars here in the US to spend on such things...

    3. Re:I'm so proud by Frumious+Wombat · · Score: 1

      So when do our troops get the powered armor to go with their nifty new laser cannon?

      Of course, maybe it's just time to go for simplicity, and throw rocks from orbit.

      --
      the more accurate the calculations became, the more the concepts tended to vanish into thin air. R. S. Mulliken
    4. Re:I'm so proud by MrSteveSD · · Score: 1

      I have a feeling these things might not be so good. I mean, it's probably going to be quite slow to fire. You won't be able to blast off loads of shots like in Star Wars. It will be more like a Musket being frantically reloaded while dozens of artillery shells are on the way.

    5. Re:I'm so proud by 2.7182 · · Score: 1

      No. Most optical quality mirrors are about 99% reflective. Look it up in the edmund scientific catalog.

    6. Re:I'm so proud by ozmanjusri · · Score: 1
      Fire a group of spinning and reflective mortars followed closely by a larger group of "regular" mortars.

      Better if lead group are smoke/reflective chaff shells. Then just keep popping off regular mortars until the air clears. Rinse. Repeat.

      --
      "I've got more toys than Teruhisa Kitahara."
    7. Re:I'm so proud by AI0867 · · Score: 1

      thing is, these lasers generally aren't in the infra-red spectrum and don't kill their target by melting it. In fact, a reflective surface is the one most easily destroyed by a laser because it first has to stop the light and then push it back, doubling the force. There is a reason this is referred to as an 'impact kill': you simply push enough energy into your laser that there's a tangible impact from all the photons hitting your target.

      Or I could be all wrong and it's the old "shoot down ICBMs and satellites" starwars system I'm talking about. I have to admit to not following the development of military lasers too closely lately.

    8. Re:I'm so proud by Anonymous Coward · · Score: 0

      C-130? Can you say Advanced Tactical Laser (ATL)? It's real. I have seen it.

    9. Re:I'm so proud by ozphx · · Score: 1

      Depends on the wavelength of light you are looking at. Might be 100% in the visible range, but bugger all in UV-B.

      --
      3laws: No freebies, no backsies, GTFO.
    10. Re:I'm so proud by donaldm · · Score: 2, Interesting

      Having a laser that can "vaporise" or at least cause the target to breakup and explode is the stuff of science fiction. This is not to say it can't be done given enough money and research but this technology does not come cheap and then you have to ask "is this worth it"?

      The are many solutions of hitting a speeding object some of them cheap and other prohibitively expensive and a "Star-Wars laser" is very much on the expensive side. A cheaper solution and one that has been tested with varying degrees of success is something like a a radar and laser detection and targeting system followed by a rapid firing weapon using conventional or non conventional explosive rounds.

      One ruggedized weapon system that could work well with fast rapid deployment is some thing like a radar and laser detection and targeting system coupled with some thing like a "Metal-Storm" system http://en.wikipedia.org/wiki/Metal_Storm. This type of system could quite easily be built at a fraction of the cost of a laser weapon system and would be much more reliable. Of course if you really need to destroy an incoming projectile over a much longer distance (more than 20km) then a missile system like the "Patriot Missile System" is probably the best thing.

      All weapon systems have strengths and weaknesses and in a war situation it is not necessarily the best or the most innovative technology that can win, although it does help. If you look at history this has proven true time and time again.

      --
      There ain't no such thing as proprietary standards only proprietary formats. Standards are by definition open.
    11. Re:I'm so proud by apt142 · · Score: 1

      Yeah, really, smoke grenades/flares/etc. are so much cheaper and easier to smuggle across the country. And you don't have to clean them up before you fire them.

      It will make aiming a bit difficult though. That's a critical part because insurgents aren't likely to have a boatload of mortar shells to fire.

    12. Re:I'm so proud by elmarkitse · · Score: 1

      Wait...we just made trucks with frickin laser beams on their heads?

    13. Re:I'm so proud by jon_anderson_ca · · Score: 1

      Or on sharks' heads...

    14. Re:I'm so proud by TropicalCoder · · Score: 1

      This truck is going to be like a big target driving through the streets of Baghdad. When it gets hit, the result most likely will be a big, messy explosion with poisonous chemicals released and many lives lost.

    15. Re:I'm so proud by Anonymous Coward · · Score: 0

      you are missinformed or have outdated informations. Regular home-use mirrors already reflects on average 80% of the incoming light. Simple military around 90 to 95%, and the best known mirror actually made are 99.999% reflective.

    16. Re:I'm so proud by Lucas123 · · Score: 1

      Everybody wants to rule the world...

    17. Re:I'm so proud by Anonymous Coward · · Score: 0

      Sorry, but no. All laser weapons, starwars systems included, work by heat.

      Take a look at a solar sail design sometimes, there's a reason those things have to be enormous, you need gigawatts of power in photons to get any acceleration, and even that's at levels that wouldn't hurt a fly.

  2. They're getting smaller every day. by AragornSonOfArathorn · · Score: 5, Funny

    Yesterday: 747-mounted laser.
    Today: Truck-mounted laser.
    Tomorrow: Shark-mounted laser.

    --
    sudo eat my shorts
    1. Re:They're getting smaller every day. by zamboni1138 · · Score: 5, Informative

      They're still working on the 747-mounted laser.

    2. Re:They're getting smaller every day. by SpaceballsTheUserNam · · Score: 0

      I think they actually gave up on it if I remember correctly.

      --
      \.
    3. Re:They're getting smaller every day. by Anonymous Coward · · Score: 1, Funny

      Today: Truck-mounted laser.
      Tomorrow: Shark-mounted laser.


      RTFA - The 20-ton truck is actually a shark tank on wheels.

    4. Re:They're getting smaller every day. by Anonymous Coward · · Score: 0

      "Yesterday: 747-mounted laser.
        Today: Truck-mounted laser.
        Tomorrow: Shark-mounted laser."

      And the day after that: Squirrel-Mounted lasers, who knows???

    5. Re:They're getting smaller every day. by guisar · · Score: 1

      This will come in really handy among the hills of Afghanistan and the narrow streets of Bagdhad. Imagine being able to pinpoint terrorists, find weapon caches and occupy territory with these weapons- why they are just as useful in these scenarios as they are against the imaginary massive army of mechanized forces for which they might have been of some use. Just the thing to run up the deficit and a great trade off compared to say, more active duty end strength or veteran education programs.

    6. Re:They're getting smaller every day. by jamstar7 · · Score: 3, Funny

      Yesterday: 747-mounted laser.
      Today: Truck-mounted laser.
      Tomorrow: Shark-mounted laser.

      Tomorrow afternoon: Large tank of water in the back of a truck to carry shark-mounted lasers.

      --
      Understanding the scope of the problem is the first step on the path to true panic.
    7. Re:They're getting smaller every day. by timeOday · · Score: 4, Interesting

      I'm guess you're being sarcastic, but taking out incoming mortar, artillery, and rockets really would be a boon in most forseeable conflicts including Iraq. For instance: "BAGHDAD, July 10 -- More than two dozen mortar shells pounded the Green Zone on Tuesday, killing three people, including a U.S. military member, and injuring 18, among them five Americans, U.S. officials said."

    8. Re:They're getting smaller every day. by jcr · · Score: 2, Funny

      It's when they get to the roach-mounted lasers that they'll really have a tactical advantage.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    9. Re:They're getting smaller every day. by AshtangiMan · · Score: 1

      How does a laser take out a mortar round? I guess perhaps if it's one of those astroid exploding lasers that they have in the movies . . . but here in reality how does that work? Is it an anti-gravity laser?

    10. Re:They're getting smaller every day. by jcr · · Score: 1

      How does a laser take out a mortar round?

      By overheating it and detonating it in the air.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    11. Re:They're getting smaller every day. by commodoresloat · · Score: 1

      I'm no expert on the technology involved, but I'm guessing that if you know that incoming rockets/mortar are in the air with enough time to get the trucks in position and shoot them down with a laser, you also have enough time to get out of the way, and you probably already have a bead on the source of the fire. Any laser-equipped trucks with an actual ability to shoot down incoming missiles and objects will of course become the first target of any such attacks. I'm not saying this tech is useless, but I'm not sure it would change much in the long run.

    12. Re:They're getting smaller every day. by sconeu · · Score: 1

      Plus, slagging it tends to deform it and reduce it's aerodynamics badly.

      C-RAM (Counter Rocket/Artillery/Mortar) is a great thing for the guy in the field.

      And to the guy who talked about blinding baby seals, you don't have to worry about that. If this thing would hit you with a strike that would blind you, you'd be dead anyways with a coagulated brain.

      --
      General Relativity: Space-time tells matter where to go; Matter tells space-time what shape to be.
    13. Re:They're getting smaller every day. by icebrain · · Score: 1

      Eh, you put the truck in position BEFORE the rounds are in the air. The rounds are probably in the air for no more than 30 seconds or so, so you have to be prepositioned and waiting.

      --
      The meek may inherit the earth, but the strong shall take the stars.
    14. Re:They're getting smaller every day. by Amouth · · Score: 1

      the idea is to pump so much energy in it via light energy that it heats up and either causes the internal explosives to detonate in the air so that it isn't a threat or to cause the shell to heat up to the point where it fractures and breaks apart and is no longer a threat or to cause the caseing to vaporise and again.. not be a threat

      it isn't that hard to do .. jsut requires extreamly good aim and tracking and a massive power source..

      --
      '...if only "Jumping to a Conclusion" was an event in the Olympics.'
    15. Re:They're getting smaller every day. by UncleTogie · · Score: 1

      They're still working on the 747-mounted laser.
      Yes, and currently it makes some really fine popcorn!
      --
      Don't tell me to get a life. I'm a gamer; I have LOTS of lives!
    16. Re:They're getting smaller every day. by Anonymous Coward · · Score: 0

      That's just what they said they'd done! MIND CONTROL LASER BEAMS! Wooooooooooooooo!!!111oneshiftCAPSLOCK!!

      Only GPL v3 can protect you, Comrade!

      RMS

    17. Re:They're getting smaller every day. by Original+Replica · · Score: 1
      I think the idea is more like a land base CIWS Phalanx system.

      The CIWS has two radars that work together to engage targets. The first radar is the search radar, located inside the radome on the weapon control group (top of the white painted portion). The search subsystem provides bearing, range, velocity, heading, and altitude information of potential targets to the CIWS computer. This information is analyzed to determine whether the detected object should be engaged by the CIWS system. Once the computer identifies a valid target (see details below), the mount moves to face the target and then hands the target over to the track radar. The track radar is an "orange peel"-style radar that is more precise, but can only view a much smaller area. The track radar observes the target until the computer determines that the probability of a successful hit is maximized and then, depending on the operator conditions, the system will either fire automatically or will recommend fire to the operator. While firing, the system tracks outgoing rounds and 'walks' them onto the target.http://en.wikipedia.org/wiki/Phalanx_CIWS

      1.Put a system with the ablity to spot, identify,and track incoming mortars, rockets, etc. on a truck with some firepower to disable the incoming attack.
      2. Park the truck at the edge of the area you want to protect.
      3. Do the rest of your mission with much less concern about incoming artillery.

      Here's another nice article explaining it:http://www.defensetech.org/archives/001623.html
      --
      We are all just people.
    18. Re:They're getting smaller every day. by afidel · · Score: 3, Funny

      Well, the intermediate step would be lasers mounted on trained spy squirrels.

      --
      There are 4 boxes to use in the defense of liberty: soap, ballot, jury, ammo. Use in that order. Starting now.
    19. Re:They're getting smaller every day. by Nefarious+Wheel · · Score: 1, Informative

      Truck-mounted Phalanx? You're joking. Way too much metal to carry around to feed it. Even used intermittently it takes a ship to carry the necessary ordinance, and mortars can happen to you all day. Photons weigh a lot less.

      --
      Do not mock my vision of impractical footwear
    20. Re:They're getting smaller every day. by R3d+M3rcury · · Score: 1

      I'm no expert on the technology involved, but I'm guessing that if you know that incoming rockets/mortar are in the air with enough time to get the trucks in position and shoot them down with a laser, you also have enough time to get out of the way, and you probably already have a bead on the source of the fire. Which is why you leave them sitting out in the middle of compound and constantly manned. So that in case there's a mortar attack, the trucks are all warmed up and ready to start shooting.

      Although this does beg an entertaining question: How will this affect the various radars that are used to destroy mortars (counter-battery fire?). As I understand it--and I'm also no expert--these radars work by tracking the flight of the mortar and figuring out where it was fired from so that you can send a bunch of mortars back at them. So if you destroy all the incoming mortars, do you have to let some of them fly for awhile intil you can track it backwards? If so, does this give less time to the laser to destroy them before they hit the ground?
    21. Re:They're getting smaller every day. by Original+Replica · · Score: 1

      Way too much metal to carry around to feed it.

      That's why it's getting a laser. Kinda what the whole article was about: lasers on trucks. You should read it some time.

      --
      We are all just people.
    22. Re:They're getting smaller every day. by suggsjc · · Score: 1
      What about a 747 carrying a load full of trucks carrying tanks full of shark mounted lasers...next week?

      This reminds me of a Jack Handy quote.

      Contrary to what most people say, the most dangerous animal in the world is not the lion or the tiger or even the elephant. It's a shark riding on an elephant's back, just trampling and eating everything they see.
      --
      When I have a kid, I want to put him in one of those strollers for twins and then run around the mall looking frantic.
    23. Re:They're getting smaller every day. by icegreentea · · Score: 1

      well, to be fair, there IS a land based phalanx. you fire in half second bursts and it shouldnt be that bad. and if your wondering, they use HE-I bullets to blow up on impact or tracer burnout, so the chances of missed bullets landing somewhere is pretty low. besides, if your defending a single fixed point, especially one that is essentially the start of your supply line, logistics wont be such a problem.

    24. Re:They're getting smaller every day. by saltydogdesign · · Score: 1

      And of course, if that doesn't work out, at least there will be a lot of Boeing execs with the cash to buy that fourth vacation home.

      --
      // This is not a sig.
    25. Re:They're getting smaller every day. by PakProtector · · Score: 1

      Yes, but will it blend?

      --

      Edward@Tomato - /home/Edward/ man woman
      man: no entry for woman in the manual.
      "Qua!?"

    26. Re:They're getting smaller every day. by greenbird · · Score: 1

      Yesterday: 747-mounted laser.

      Today: Truck-mounted laser.

      Tomorrow: Shark-mounted laser.

      You forgot the squirrel-mounted laser in there somewhere.

      --
      Who is John Galt?
    27. Re:They're getting smaller every day. by guisar · · Score: 1

      My guess is that this 20 ton truck (dragon wagon?) would be target of the mortars, just as APCs have begun the target of IEDs. Something which only serves itself is, in the business, known as a self-licking ice-cream cone; think battleships and to some measure aircraft carriers. They might have a purpose, but it's only accidental and definitely not what was envisioned when the weapon system was designed. I actually worked on one of the first deployed laser weapons- it was and is fantastic in it's place. Unfortunately, that place is NOT the modern day battlefield. Something which illuminated an area and temporarily blinded the recipients, that would be useful, the described purpose is fanciful and designed to appeal to people who think Star Wars (the movie) type weapons will be invented with the next decade (hint: they won't).

    28. Re:They're getting smaller every day. by Anonymous Coward · · Score: 0

      You need to work on your reading comprehension.

    29. Re:They're getting smaller every day. by untaken_name · · Score: 1

      Although this does beg an entertaining question:

      No, it doesn't.

    30. Re:They're getting smaller every day. by Anonymous Coward · · Score: 0

      And now picture a freaking BEOWULF CLUSTER of 747s!

    31. Re:They're getting smaller every day. by Anonymous Coward · · Score: 0

      That's why it's getting a laser. Kinda what the whole article was about: lasers on trucks. You should read it some time. Wow, you sure told him! It's not like he was replying to someone who commented about land-based phalanxes, and then said "Photons weigh a lot less", which would imply that he knew exactly what the article was about. I mean, if he had something like that, of course, you'd look like a complete tool.

      Waiiiiiiit a minute...
    32. Re:They're getting smaller every day. by Nefarious+Wheel · · Score: 0

      GP said "Phalanx", which works by moving a lot of metal through the air. http://en.wikipedia.org/wiki/Phalanx_CIWS/ I thought he was suggesting it was a better option, although it could have been just a comment on the guidance system. I'm moderately familiar with the concept of a laser and how it works, I read the article. You had something constructive to add, or were you just being a prick?

      --
      Do not mock my vision of impractical footwear
    33. Re:They're getting smaller every day. by rtb61 · · Score: 1

      Of course if it misses for any reason at all, the laser tends to set fire to what ever else it hits for as far as the eye can see. The higher the energy output the more dangerous it becomes.

      --
      Chaos - everything, everywhere, everywhen
    34. Re:They're getting smaller every day. by hcdejong · · Score: 1

      A Phalanx weighs about 6 tons loaded. The system carries enough ammo for a few engagements. It's no problem to bring in a second truck for reloading. 20mm rounds weigh 100 g apiece, so a full ammo load (1500 rounds) is about 150 kg.

      That's no worse than having to supply the fuel for a laser.

    35. Re:They're getting smaller every day. by Nthn · · Score: 1

      I figure all God's creatures deserve a warm meal...

    36. Re:They're getting smaller every day. by wolfemi1 · · Score: 1

      Yesterday: 747-mounted laser.

      Today: Truck-mounted laser.

      Tomorrow: Shark-mounted laser.

      Tomorrow afternoon: Large tank of water in the back of a truck to carry shark-mounted lasers.

      Day after tomorrow: Big plane to airlift truck with large tank of water carrying shark-mounted lasers.

    37. Re:They're getting smaller every day. by RxScram · · Score: 1

      Of course, since it is shooting from the ground towards an object in the sky, then if it misses and keeps going as far as the eye can see... well, it keeps going as far as the eye can see, and then keeps going and going and going. I guess there is an almost infinitesimal chance of it hitting something before it loses all of its power, but the atmosphere is thick... more than likely, it won't even reach space.

    38. Re:They're getting smaller every day. by rtb61 · · Score: 1
      You just cant grasp the logic can you. Your acquire the target, you bring the laser onto the target and track the target with the laser until the target is destroyed, some seconds, as the laser cuts a swathe across the sky based upon the velocity of the mortar round and the 'minimum' required time to destroy the target or until you reach the minimum depression angle for the laser weapon.

      Now follow out the arc across the sky and at a still lethal or extremely dangerous distance and it is cutting a very long arc across the sky, add to that of course is the fact that the earth ain't flat, high rise construction and aeroplanes or even satellites, all of this of course is line of sight to the horizon, quite a ways.

      Now add multiple targets and multiple firings and it becomes like two blind swordsmen fighting a duel in a room full of people, everybody else ends up dead before the swordsmen have even clashed swords.

      --
      Chaos - everything, everywhere, everywhen
  3. That's great, but... by AdmiralAudio · · Score: 5, Funny

    How soon will we see these being mounted on the heads of ill-tempered seabass?

    1. Re:That's great, but... by LiquidCoooled · · Score: 5, Funny

      How the hell can the parent be offtopic?

      Dr. Evil: You know, I have one simple request. And that is to have sharks with frickin' laser beams attached to their heads! Now evidently my cycloptic colleague informs me that that cannot be done. Ah, would you remind me what I pay you people for, honestly? Throw me a bone here! What do we have?
      Number Two: Sea Bass.
      Dr. Evil: [pause] Right.
      Number Two: They're mutated sea bass.
      Dr. Evil: Are they ill tempered?
      Number Two: Absolutely.
      Dr. Evil: Oh well, that's a start.

      --
      liqbase :: faster than paper
    2. Re:That's great, but... by Starteck81 · · Score: 0

      Boeing is mostly from western Washington. I would think it would be ill tempered seagulls or salmon.

      --
      "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed H
  4. Its completly stupid by Aranykai · · Score: 0, Flamebait

    Laser weapons are stupid. They are not efficient in an atmosphere. Its been proven many many times. Get over it nerds, this isn't star.

    --
    If sharing a song makes you a pirate, what do I have to share to be a ninja?
    1. Re:Its completly stupid by Anonymous Coward · · Score: 0

      Maybe it isn't "star", but it it could be STAR WARS.

      /me is excited.

  5. Damnit! by simp · · Score: 5, Funny

    This government is so incompetent!! Bush screwed up. Again...

    Sharks, I wanted sharks. Is that so difficult?

    1. Re:Damnit! by xENoLocO · · Score: 2, Funny

      Introducing the Bass from GMSea

      --
      "The need to build the internet comes from something inside us, something programmed... something we can't resist."
    2. Re:Damnit! by SnarfQuest · · Score: 1

      It's part of the mad scientist rules.

      You need to start with the giant man-eating badgers, then you get to build camera mounts for squirrels; only then, do you get to work with the sharks.

      --
      Who would win this election: Andrew Weiner vs Andrew Weiner's weiner.
    3. Re:Damnit! by LifesABeach · · Score: 1

      What a light show it would make; Deadly as anything, but what a light show. Maybe Google maps could show it in real time?

    4. Re:Damnit! by Anonymous Coward · · Score: 0

      Trained dolphins with camera guided rail guns mounted on their heads a valid substitute for ya?

  6. So then... by Anonymous Coward · · Score: 0

    would there be sharks driving these trucks?

    1. Re:So then... by Anonymous Coward · · Score: 0

      would there be sharks driving these trucks?
      Yes, landsharks. Seem that USA has a massive surplus of them. Good for canon fodder I bet.
  7. The adult in me says by the_skywise · · Score: 5, Funny

    Guns of destruction are bad.

    But the kid in me says...

    SA-WEEET!!!!!!

    1. Re:The adult in me says by ArmyOfFun · · Score: 2, Funny
    2. Re:The adult in me says by Chris+Burke · · Score: 5, Funny

      The kid in me is disappointed that the truck doesn't transform into a humanoid robot with the laser held in its hand like a gun.

      --

      The enemies of Democracy are
    3. Re:The adult in me says by arbitraryaardvark · · Score: 1

      Bigger better lasers currently are being driven by the demand curve for blowing things up, but bigger better lasers will be useful later for space propulsion.

    4. Re:The adult in me says by doombringerltx · · Score: 1

      Well the guns healing are still in development

    5. Re:The adult in me says by Anonymous Coward · · Score: 0

      Then why are you against devices (Read: Not weapons.) designed to protect the lives of our servicemen? People like... well, me.

      Think my M16 evil if you will, but saying something like this is akin to it is like saying you don't think i should have a flak jacket or kevlar helmet.

    6. Re:The adult in me says by LWATCDR · · Score: 2, Insightful

      Guns that stop bullets good.
      Hey I have no problem with defensive systems like this.

      --
      See my blog http://ilovecookes.blogspot.com/ for light hearted technical information.
    7. Re:The adult in me says by R2.0 · · Score: 1

      The adult in me says guns of destruction are good...

      The Martian in me says "Where's the kaboom? There's supposed to be an Earth-shattering Kaboom!"

      --
      "As God is my witness, I thought turkeys could fly." A. Carlson
    8. Re:The adult in me says by Anonymous Coward · · Score: 0

      "Guns of destruction are bad."

      No, that's your pussy talking.

    9. Re:The adult in me says by Widowwolf · · Score: 1

      Hey get back over to the middle east..Bush didnt say you could come home yet... We need more americans protecting our precious oil wells..

      --
      ~~"Of course, that's just my opinion. I could be wrong." ~~Dennis Miller
  8. Might work in pure mountain air by EmbeddedJanitor · · Score: 3, Interesting

    surrounding Seattle, but I think you're right. I would not want to fire one of these in the dust and smoke of a typical battlefield. That energy will just get dissipated locally which can't be a GoodThing.

    --
    Engineering is the art of compromise.
  9. No, not really by everphilski · · Score: 5, Informative

    The range to shoot down a RAM (rocket-artillery-mortar) threat is on the range of a few kilometers. Laser attenuation ovr that short a distance is pretty minimal. My master's thesis was on this concept, but swapping out the laser for a gun-launched projectile... you actually don't need that much focused energy to destroy a RAM threat mid-flight.

    1. Re:No, not really by a-zarkon! · · Score: 1

      Can this be defeated if the RAM has a shiny mirror-like finish?

    2. Re:No, not really by Aranykai · · Score: 1

      Its possible, but its incredibly inefficient. The only thing they have managed to do is analyze currents and movement in the air(with yet another laser) so that they can modify the actual weapon beam to be less succeptable. Its called adaptive optics. Not to mention, the laser here is called a "megawatt". And, from the story its mounted on a 20 ton truck? Yeah, im sure they will have plenty of those to go around go cover major targets when they have a range of "a few kilometers".

      --
      If sharing a song makes you a pirate, what do I have to share to be a ninja?
    3. Re:No, not really by everphilski · · Score: 3, Informative

      The event horizon for a RAM threat is incredibly short. Seconds. Depending on the scenario, if you do not get your shot off within a few seconds of detection, you are dead in the water. Secondly, the amount of energy necessary to take out a RAM is pretty low... on the order of tens of kilojoules. These facts I know from my research.

      (Up until a few months ago, I worked 2 rooms over from some of the guys doing the modeling and simulation for this particular system ... this is a test bed, not the finished product)

    4. Re:No, not really by Anonymous Coward · · Score: 0
      Yeah, im sure they will have plenty of those to go around go cover major targets when they have a range of "a few kilometers".

      How big is the "Green Zone"? How big is the Pentagon? How far apart are the White House/Capitol/etc? A few kilometers is plenty big enough if you can be precise about what you are protecting, though obviously you can't protect an entire city...

    5. Re:No, not really by jcr · · Score: 1

      Can this be defeated if the RAM has a shiny mirror-like finish?

      Quite possibly. Of course, coming up with a finish that's reflective to all wavelengths that might be used, is a bit tricky. The beam could be anything from UV to microwave.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    6. Re:No, not really by Lonewolf666 · · Score: 1

      Secondly, the amount of energy necessary to take out a RAM is pretty low... on the order of tens of kilojoules. These facts I know from my research.
      What sort of projectile did you assume?
      A thin-skinned missile that will blow up when you get through the hull? Or an artillery shell with thicker walls and rotation that will distribute the heat over its surface?

      --
      C - the footgun of programming languages
    7. Re:No, not really by VagaStorm · · Score: 1

      How quickly can you aim that thing? I know very little about mortars, but vs artillery, I'd say you have like 10-15 seconds depending on distance. With each unit firing 3-6 shells a minute, and them generally operation in batteries of 4-6 artillery units, you had better aim FAST! Or, you'll need allot of synced lasers so they don't target the same shells....

    8. Re:No, not really by MrNaz · · Score: 1

      Actually, you may want to comment on my ridiculously rudimentary assessment in another comment. I'd like to know how close my fumbling around was :)

      I concluded that you need 152 Kj to blow up the projectile, requiring 611W emission from a laser, assuming no attenuation.

      Close? Or was I way off?

      --
      I hate printers.
    9. Re:No, not really by everphilski · · Score: 1

      Presumption was the mortar because, as you pointed out, they are structurally more massive (thicker walled) and have a spin to them. If you can take out a mortar, the rocket, from an energy standpoint, is a piece of cake.

    10. Re:No, not really by barkingcorndog · · Score: 1

      I've found that memtest is pretty good at assessing and preventing RAM threats.

      --
      "I know together we'll make the possible totally impossible" - Homme
    11. Re:No, not really by Anonymous Coward · · Score: 0

      Umm....

      Most military projects produce these sums when they want to get their grant.

      What they don't do is consider enemy countermeasures. Doing exactly what you did (little thought, rule of thumb, etc) I would suggest a tactical analysis along the following lines:

                                                                                    Top Secret

      Cost and manoeveurability of 20 ton truck with laser is high and low respectively. So we want to deploy them in easy-to-manoeveure environments, or have them heavily guarded in difficult environments, such as towns.

      Mortars are typically an insurgent problem in a town setting. Heavy guards will mean that there are many more US targets for snipers and the like. The cost of an IED mine taking out the laser truck (LT) may be prohibitive.

      If an insurgent wanted to engage a target protected by an LT, the LT would need to be neutralized. This may be done by secondary forces (see above) or it may be achieved by the insurgent mortar team.

      Possible strategies are:

      Simultaneous use of several mortars from different locations, swamping the LT's target acquiring and laying rate.

      Use of solid mortar rounds. Either specially made solid rounds, or improvised live rounds emptied and filled with concrete, would be quite survivable in a laser pulse. Even if these were heated to incandescence, their impact on an LT would disable it. The LT and surrounding troops could then be attacked with HE rounds in the normal manner.

                                                                              Top Secret

  10. Sure... by chaidawg · · Score: 5, Funny

    ...but can it drive a 6 inch spike through a board with its penis?

    1. Re:Sure... by trybywrench · · Score: 3, Funny

      ...but can it drive a 6 inch spike through a board with its penis?
      a girl's got to have her standards

      --
      I came to the datacenter drunk with a fake ID, don't you want to be just like me?
    2. Re:Sure... by jjacksonRIAB · · Score: 0

      So you'll hammer later

      --
      Make a few bad jokes on /. and watch your karma become worthy of Hitler
    3. Re:Sure... by T23M · · Score: 1

      Not right now...

    4. Re:Sure... by Temtongkek · · Score: 1

      I still want 5 megawatts by mid-May.

  11. In this day and age? by WindBourne · · Score: 2, Funny

    With the current admin, we are much more likely to put them in a high quality Chery truck (made by china and to be sold shortly by Chrysler).

    --
    I prefer the "u" in honour as it seems to be missing these days.
  12. Oblig. CNC by andrewd18 · · Score: 4, Funny

    Heavy Expanded Mobility Tactical Truck
    Also known as the predecessor to the Mammoth Tank.
  13. Command and Conquer... by Notquitecajun · · Score: 1

    Nothing new, we saw this in the C&C: Generals game, when they were mounted on several USA vehicles.

    1. Re:Command and Conquer... by Anonymous Coward · · Score: 0

      Yah, this is the Avenger air-defense HMMWV. Only, larger and slower. But it's a prototype, like.

      Next up: King Raptors. "Let's give 'em an air show!"

      And, to remain on-topic, that has anti-missile laser point defenses. Like sharks with lasers on their foreheads, except that it's lasers on their butts.

    2. Re:Command and Conquer... by yourmomisfasterthana · · Score: 0

      how did you hear about the 'lazersharks with butts' prototype? thats supposed to be highly classified research!

      --
      -Yourmomisfasterthanabeowulfcluster
  14. power reqs. by trybywrench · · Score: 3, Insightful

    I wonder how much power it takes to run and if it can target multiple incoming threats at once. It would be awesome if it could take on say 5 or 8 incoming mortars at the same time. Even better would be knocking out a barrage of RPG's. I guess the final implementation would be zapping bullets out of thin air which at that point you'd have a "shield" like in sci-fi. Military tech amazes me.
     

    --
    I came to the datacenter drunk with a fake ID, don't you want to be just like me?
    1. Re:power reqs. by Firethorn · · Score: 1

      1 truck, one laser, one threat at a time. Ability to handle multiple projectiles would be to either have multiple trucks or deal with the attack sequentially. IE it takes 3 seconds to deal with one projectile while the set is targetable for 30.

      Knocking out a barrage of RPG fire is unlikely, RPGs are actually very short ranged, pretty much strickly line of sight, sub 300 meters. There's several different technologies designed to help deal with RPG fire. As for plain bullets, the old technology still works best - armor.

      --
      I don't read AC A human right
    2. Re:power reqs. by Anonymous Coward · · Score: 0

      Zapping bullets out of thin air would create a liquid bullet that was still flying at you. I think I'd rather just get hit with a solid bullet.

    3. Re:power reqs. by jcr · · Score: 1

      If you turn it into a blob of liquid, it's likely to turn into a spray of rapidly-cooling lead, which presents a lot more frontal area, and would be going a lot slower if it still hit you at all.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    4. Re:power reqs. by ElectricRook · · Score: 1

      A bullet is more likely to be a spinning projectile... the molten blobs would fan out into a ring due to centrifugal force.

      Kind of like "snake shot" for your pistol.

      I tried to shoot a possum out of a tree with snake shot... I finally hit him with the wad, and knocked him down. Did him in with a shovel. That snake shot stuff is crap.

      --
      - High Tech workers, please say NO to Union Carpenters, their Union sees fit to control our compensation.
    5. Re:power reqs. by darkmeridian · · Score: 1

      With this system, you can vaporize the RPG and the insurgent who is shooting at you. There's no reason aside from "moral"* ones that prevent this from being pointed at ground targets.

      * Geneva Convention prevents us from blinding people on purpose, and the reflected/scattered light from this laser tends to blind innocent bystanders.

      --
      A NYC lawyer blogs. http://www.chuangblog.com/
    6. Re:power reqs. by pimpimpim · · Score: 1

      Probably they were testing them just this week in SF...

      --
      molmod.com - computing tips from a molecular modeling
    7. Re:power reqs. by Dunbal · · Score: 1

      Zapping bullets out of thin air would create a liquid bullet that was still flying at you. I think I'd rather just get hit with a solid bullet.

            Artillery shells are filled with high explosive. They are not "bullets". It's been a long time since I did chemistry, but I remember high explosive does not explode if you heat it - it just burns. You need a physical shock to cause an explosion.

            If you heat the substance used as a detonator enough, however, you will set it off and explode the shell in mid flight. This means that most of the shrapnel will fly off the trajectory. You'll still have some damage downrange, but FAR FAR less.

      --
      Seven puppies were harmed during the making of this post.
    8. Re:power reqs. by Dunbal · · Score: 1

      1 truck, one laser, one threat at a time.

            You have obviously never been to a laser-show.

            Throw in a sophisticated target tracking system, computers, lenses, and how many simultaneous targets did you want to kill?

      --
      Seven puppies were harmed during the making of this post.
    9. Re:power reqs. by Anonymous Coward · · Score: 0

      why didn't they just take the phalanx off of the aegis destroyers and mount it on a truck bed?

      http://www.naval-technology.com/projects/burke/

    10. Re:power reqs. by Firethorn · · Score: 1

      I fail to see how a laser show would have much relevance in this. You'd have the sophisticated tracking system, but you still need to dump a large amount of heat into each individual target to disable/destroy it. The nature of the targets for a system such as this make them vulnerable to lasers - but the higher the intensity of the laser the more effective it is.

      This is best done not by splitting up the laser among different targets but concentrating on one at a time. Consider that they weren't mounting a weaponized laser on a fighter or even a C-130. They mounted it in a 747, a relatively huge plane. Rather than trying to kill three targets at once, you kill them sequentially.

      --
      I don't read AC A human right
    11. Re:power reqs. by Magada · · Score: 1

      They did that too. Amazingly enough, it works with only minor modifications. Only trouble is that it has limited value - the LPWS (aka Phalanx CIWS block 2B on a truck) has a small-ish magazine (2000 rounds) and fires 200-300 rounds at any one target. The engagement time is pretty long (see, classify, shoot, watch for impacts, confirm kill, rinse, repeat). The hit/kill ratio is at or around 90% for any one gun/target. Bottom line, you can maybe shoot down 9 out of the first 10 mortar shells, if they come at you staggered enough. The next salvo (most probably coming from an entirely different place) is going to find you with your pants around your ankles.

      The laser system, well... there are many advantages. You can tell very quickly when it's ok to stop shooting (basically, if the target's been brightly lit for $nanoseconds, you stop shooting), you don't have to wait for bullets to crawl to where the target is probably going, there's no windage to adjust for (there is air turbulence, but that can be adjusted for in real time, not for the next bullet being fired) plus I'd imagine there's not much danger of running out of "ammo".

      That being said, I'd love to see what happens if one of these babies ever gets captured by the irakis.

      --
      Something bad is coming when people are suddenly anxious to tell the truth.
    12. Re:power reqs. by salec · · Score: 1

      You could, if "insurgent" was in line-of-sight with you, but typically they aren't, hence high-profile trajectory, which is a good case for laser shot. In fact, you are better off with having your own mortars ready for fast response & targeting radar which recalculates position from incoming shell trajectory.

    13. Re:power reqs. by salec · · Score: 1

      However, there never was a show stopper weapon in the history of war.

      There is always a workaround. Sometimes it is a stupid, "non-workaround" like sending bigger mass of infantryman against machine guns and barbed wire in WWI, but each new mil tech is response to a particular problem, which poses a new problem for other side, which then eventually finds out another response and so on.

      So far, there are certain premises behind MTHEL. That premises are that threat is small, fast but at the same time very visible, with predictable trajectory and that there is uninterrupted line of sight between MTHEL and said threat (targeted shells or missiles).

      Each of these premises can and will be contested by next generation of offensive weapons that will be designed to work around this defense system, when it gets massively deployed in the field.

      Some of these "new problems" for offensive side even have working solutions today: e.g. stealth technology, cruise missiles, smart self-guided ammo that implements evasion maneuvers... robust, cheap and powerful, micro electronics today can offer intelligence to yesterday dumb and dull iron. It will push the prices of war up for both "regulars" and "insurgents" but it will not end the wars. There are even "lower tech" solutions: more "duds" launched along with "live" shells, circular or wide-angle simultaneous launches, or simple infiltration and suicide attack demolition of expensive and efficient weapon.

      My guess is that this kind of weapon (after it renders classical artillery obsolete in couple of decades) will excel in air-to-surface missions. After all, best place to spot (and fry) slow prowler missile crawling toward your positions is from high above. However, by then, all SA, AA defense will be laser-based too (no ceiling!), so it will be very risky. Whoever carries faster shooters, and more of them, will prevail in the battle between land and air. As soon as possible, "Star Wars" style instant-kill blasters will emerge...

    14. Re:power reqs. by tv_dinners · · Score: 1

      The snake shot commonly found in the .38 special round does suck. It's because of the tiny shot mass combined with the lower .38cal 1150fps velocity.

      I've tried .410 buckshot for snakes, does alright in the ThunderFive pistol. .22cal LR is best IMM.

      Now put some 20 grain snake shot in a 3000fps weapon somehow and you might have something, much like this laser disintegrated mortar round.

    15. Re:power reqs. by drerwk · · Score: 1

      Don't forget, the bullets will come back down. In an urban area this could be problematic.

    16. Re:power reqs. by Magada · · Score: 1

      Erm. No, not really. The land-based system uses the high explosive tracer shells previously used on the Vulcan gun. Not many (or big) fragments to deal with and certainly no heavy sabots falling out of the sky :).

      --
      Something bad is coming when people are suddenly anxious to tell the truth.
    17. Re:power reqs. by drerwk · · Score: 1

      Better than what I thought, but I would also bet that not every shell explodes.

    18. Re:power reqs. by Magada · · Score: 1

      Now you're nit-picking. Of course there are duds (not as many as you'd expect, as there are actually two ways to detonate such a shell). So what? This gets used in warzones, remember? People are much more likely to get killed from all those lead bullets flying around than by CIWS duds falling on their heads.

      Oh, btw... these shells aren't used to protect civilians - they're just more suited to the task at hand - if the irakis suddenly started using missiles instead of mortar shells, you can bet the US military would switch to tungsten/DU sabot rounds again in no time.

      --
      Something bad is coming when people are suddenly anxious to tell the truth.
    19. Re:power reqs. by ElectricRook · · Score: 1

      I think it's the rifling that causes the problem with shot. Spin a cloud of shot, and it spreads out too fast. And a shovel works wonders on snakes. Although my last rattler was killed with a 22LR from my Grandfathers rifle. A came home with a rifle in my hands, and the whole family was checking out by the snake in my wifes carport between our garage and house. My Wife snapped a picture just as I pulled the trigger, and you can see smoke, and the snake going down. I stretched out the skin on a piece of wood, but the dog ate it. It was 27 inches long without the head.

      --
      - High Tech workers, please say NO to Union Carpenters, their Union sees fit to control our compensation.
  15. yes, but how do they stand up against... by Anonymous Coward · · Score: 0

    A Goa'uld Death Glider?

    1. Re:yes, but how do they stand up against... by Cpt_Kirks · · Score: 1

      Hell, I have seen those wimpy-assed things knocked down by an MP5.

  16. My analysis by Xeth · · Score: 2, Insightful

    Pro: Well-paid engineers and scientists are kept in the U.S. at work on neat toy, keeping valuable talent working on a difficult problem.

    Con: Obscenely-paid CEOs who came up with idea to push this useless weapon get a huge payoff, keeping destructive leeches working on the simple problem of continuing corrupt government.

    --
    If your theory is different from practice, then your theory is wrong.
    1. Re:My analysis by bagsc · · Score: 1

      My first thought was "Why can't the US govt pay more to have this designed, prototyped, and fielded within 12 months?"

      Think about World War II. In light tanks, went from the M2 tank in 1941 to the M3 in 1942 to the M5 in 1943 to the T7 in late 1943. Meanwhile, the HMMWV (first fielded in '84) has been blown to bits since 2003, being the leading cause of losses in a war, and in 2006 we finally being testing MRAP. I am angry, because my government is more worried about wasting money than winning wars, and about a thousand soldiers have died because of it, and probably 20,000 wounded. If some American has to get rich to save lives and win wars, so be it.

      Indirect fire, from mortars and rockets are the number two killer in Iraq. This system might have only saved a few hundred lives. If it makes you feel better about pinching pennies in a war, the cost of fielding the system would be cheaper than the medical expenses, rehabilitation, and other payouts from the 10,000 or so wounded from indirect fire.

      My problem with the government is that they're focused on blaming people for mistakes about starting wars instead of fixing the problems in winning them.

      --
      http://www.accountkiller.com/removal-requested
    2. Re:My analysis by Anonymous Coward · · Score: 0

      "My problem with the government is that they're focused on blaming people for mistakes about starting wars instead of fixing the problems in winning them."

      I'm sorry, I must have missed something.

      Can you remind me again just how exactly we win this war?

  17. How do clouds and smoke change this? by davidwr · · Score: 2, Interesting

    If there are a few hundred feet of dense clouds and smoke between you and the target, is the laser effective?

    I guess the only consolation is that the enemy will have a harder time seeing you with all the clouds and smoke.

    --
    Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
    1. Re:How do clouds and smoke change this? by everphilski · · Score: 2, Informative

      I don't have numbers to throw at the question ... yes, of course, there is attenuation. My point is, and what I do know from experience, the range to downing a RAM threat is not that far, and secondly the amount of energy you need to impart to down a RAM is not as much as you might imagine (tens of kJ).

  18. So will this be the demise of their ... by PalmKiller · · Score: 4, Funny

    rail gun projects? Nooooo...I think rail guns are way cooler, especially when they malfunction.

    1. Re:So will this be the demise of their ... by everphilski · · Score: 1

      Check out the Phalanx LPWS ... its a Phalanx gun mounted on a flatbed truck ... not exactly a rail gun but pretty spiff. There are some firing videos on YouTube as well...

    2. Re:So will this be the demise of their ... by Chris+Burke · · Score: 5, Interesting

      Rail guns are what the navy is going to use to replace cruise missiles (which replaced heavy ship artillery). Lots of advantages there -- about the same range and precision and destructive power as a cruise missile, but at a fraction of the cost. Plus has a huge advantage over both cruise missiles and conventional artillery shells in that the ammunition won't explode if the ship gets hit -- though I imagine the gigantic capacitors needed to fire the gun may blow up if charged up and hit, though that'd only be one shot's worth of energy rather than the ships whole payload. Rail guns have a bright future, as long as they can figure out how to keep the gun from destroying itself every shot.

      Lasers so far are mostly being considered for defensive roles to shoot missiles and artillery down. This is a good role for lasers, since first hitting the target at the speed of light is good when you're trying to hit a small fast moving target, and second because the energy needed to destroy a warhead isn't that large.

      Two awesome future technologies, two roles. It's a good time to be a geek. :)

      --

      The enemies of Democracy are
    3. Re:So will this be the demise of their ... by badman99 · · Score: 0

      Hmmm rail gun huh, but how do you get the enemy onto the tracks ?. Paint a big X at the end of the track and suspend an anvil over it, shoot the suspended anvil with the rail gun ?. Gotta admit it's just another brilliant idea from the country which will bring us all the recession we had to have (beacause americans are too greedy) now coming to an economy near you.

    4. Re:So will this be the demise of their ... by coredog64 · · Score: 2, Informative

      Rail guns are absolutely not a replacement for cruise missiles. A rail gun projectile in ballistic in nature -- if the wind is blowing the wrong way at the target you're SOL. Yes, you can use lasers for terminal guidance but that requires something to paint the target (hard to do when the target is in hostile territory. Being ballistic, it's also vulnerable to the laser defense systems being discussed here. The launch profile for a rail gun also limits the guidance package you can fit. A cruise missile has a very gentle launch profile -- a rail gun that has to accelerate to maximum velocity in under 50 ft. is much more difficult to deal with.

    5. Re:So will this be the demise of their ... by Chris+Burke · · Score: 1

      Well the navy is developing them for that purpose, so they seem to disagree. And at the energies they are talking about (8MJ in working prototypes, 64MJ planned for the full-size version) the round would be traveling so quickly that wind would have very little effect, so very little in the way of guidance is needed.

      Also a rail gun round would be much, much less vulnerable to this kind of laser anti-weapon system. For one, relative to the rail gun round a cruise missile is standing still, a ridiculously easy target. For two, the way in which these lasers destroy the incoming weapon with such a small amount of energy is by causing the warhead to explode. Rail guns are kinetic weapons, so to destroy an incoming round you would have to essentially vaporize a solid slug of tungsten.

      The major problem with rail guns that they have yet to solve is that the rails themselves experience a repulsive force equal to the force accelerating the projectile, with the result that the gun must be serviced after every shot.

      There will still certainly be uses for cruise missiles. They'll still be an excellent choice for submarines, and smaller destroyers. But if they solve or mitigate the self-destructive tendencies of the rail gun, we could be seeing the resurgence of the battleship as a primary naval weapon.

      --

      The enemies of Democracy are
    6. Re:So will this be the demise of their ... by nehumanuscrede · · Score: 1

      Not sure about that. . .

      I don't think Rail Guns will replace cruise missiles, they may augment
      them, but not replace. They just don't have the range unless we
      get the rail guns to ICBM distance standards.

      Typical land attack cruise missile ( Tomahawk ) has an unclassified max
      range of ~1700km. It's true max range, as you can guess, exceeds this
      by some distance. Some variables come into play here like weather and
      warhead loadout. ( Trivia! W-80 warhead is lighter thus can go further )
      Some variants of the Tomahawk ( specifically the TLAM-D ) can engage
      multiple targets along the flight path.

      Lasers are going to be short range systems. Due to atmospheric conditions
      they'll have to be. Line of sight is pretty much the rule on a good day.
      Heat buildup and the removal of it will dictate how fast the system can
      fire. Wonder how long it will take before mortar and artillery rounds get
      a nice chrome plating to reflect most of the incoming laser energy ?

    7. Re:So will this be the demise of their ... by Chris+Burke · · Score: 1

      Yah, that's a good point, the rail gun systems under development will only have a range of around 250 nautical miles. So for range, cruise missiles will still have a role. For "near"-shore operations, the rail guns will rule the roost.

      Missiles will also be the obvious choice for submarines and smaller ships. Our cruise missile destroyers will most likely not go away.

      --

      The enemies of Democracy are
    8. Re:So will this be the demise of their ... by Anonymous Coward · · Score: 0

      I think I'd have to disagree on the accuracy benefits of a rail gun versus a cruise missile. Rail guns are linear, they have no ballistic arc, which means if you want to hit a target inland, you have to shoot through everything between you and the target - which sounds cool - but if you lose your bullets into the side of a building or a mountain, its not very useful. Guided missiles still have benefits over rail guns I think - but once we have aircraft with laser beams (oooh ooh! can we call them sharks? and the canadian version can be sea bass?) we wont need to worry about the benefits of ballistic arcs.

      Lasers will have an important role in offensive eventually as well - snipers who dont need to adjust for windage and distance (via bullet drop), and simply put the crosshair on the face and click the mouse (too much CSS for me), will fire farther, faster, and without the sound of a shot giving their position away. (though possibly thermal still showing the hot laser rifle).

      How do rail guns fit in? I could see uses in super long range artillery - but again I'm not sure how much benefit you get unless your firing from so far back that you gain a ballistic arc - maybe thats where we can put all the trained snipers - firing rail guns from 100 kilometres back since they'll have to adjust for bullet drop and windage still.

    9. Re:So will this be the demise of their ... by Agripa · · Score: 1

      Rail guns are linear, they have no ballistic arc . . .

      Of course a rail gun is a ballistic weapon. Over a short range, projectile weapons can be considered line of sight but at some point depending on the muzzle velocity and exterior ballistics compensation for the ballistic trajectory has to be made. For artillery sized weapons, even the curvature and rotation of the earth has to be considered.

      Think of a rail gun as a smooth bore cannon with arbitrarily high muzzle velocity. Projectile weapons directly powered by chemical explosives have a muzzle velocity limitation of about 5000 ft/s.

    10. Re:So will this be the demise of their ... by ztynzo · · Score: 2, Informative

      Rail guns are what the navy is going to use to replace cruise missiles
      Realistically, the Navy uses cruise missiles to hit long range targets that are beyond line of sight (usually ~10mi due to curvature of the Earth). While scientists may be able to come up with targeting systems that make extremely high velocity projectiles accurate beyond line of sight, it is highly unlikely that the Navy would retire such a versatile offensive weapon for one that seems very limited in capabilities... (A cruise missile can hit a target on the other side of a mountain, let's see you figure out how to do that with a weapon designed to be fired in a straight line..)

      More likely to replace the 5" .54cal Mk45 and its successors.
    11. Re:So will this be the demise of their ... by khallow · · Score: 1

      I agree that railguns aren't a replacement for cruise missiles. My take is that they can easily operate beyond line of sight though, For example, battleship guns have a range up to 18 miles (for US battleships that were decommisioned in late 80's IIRC). There's no reason that one couldn't fire railguns over the horizon. They should have great range.

    12. Re:So will this be the demise of their ... by rantingkitten · · Score: 1

      While the Navy (or other branches) may supplement their firepower with railguns, railguns will not replace cruise missiles. For one thing a railgun is line-of-sight, whereas a cruise missile can navigate over mountains or whatever is in the way between you and your target.

      --
      mirrorshades radio -- darkwave, industrial, futurepop, ebm.
    13. Re:So will this be the demise of their ... by Chris+Burke · · Score: 1

      Railguns, like traditional naval artillery, are not line-of-sight. Believe me, the path to the target 250 miles away is a steep arc just like any other ballistic trajectory and will easily pass over mountains.

      Rail guns will most likely replace the heavier short-range cruise missiles in most situations, while the longer range missiles which can travel over 1000km will still be used.

      --

      The enemies of Democracy are
    14. Re:So will this be the demise of their ... by Chris+Burke · · Score: 1

      How do you figure a rail gun projectile has no ballistic arc?! Even at the speeds the projectile travels, it will still take several minutes to reach a target at the maximum range of around 250 miles, meaning several minutes of gravitational acceleration. Rail guns will have to have their trajectory calculated accounting for this much like every other artillery shell or ballistic missile, and will be just fine for shooting over mountains at deep inland targets. Put a limited guidance system on board to correct the path during the descent, and you have a cheap, effective replacement for the cruise missile in those ranges.

      Firing artillery from 100km back is exactly how they'll use it. Just like during the prime of big naval artillery they would fire at targets that were 20 miles inland. Now it'll go farther, travel faster, do more damage per pound of ordinance, and be more precise as well.

      --

      The enemies of Democracy are
    15. Re:So will this be the demise of their ... by Chris+Burke · · Score: 1

      Realistically, as in "what they're doing in reality", the Navy is designing these weapons to fire at targets as far as 250 miles away. Even at 8000 ft/s out of the barrel, that's a travel time of several minutes, and it's going to be a very steep arc. Mountains will not be a problem, unless the target is on the far slope of the mountain itself. They are absolutely not line-of-sight and while they will be very effective at short ranges that is not the extent of the Navy's goals.

      They will still keep their cruise missile destroyers and subs, since cruise missiles will still be useful. But we could very well see the battleship return as a major form of naval warship.

      --

      The enemies of Democracy are
    16. Re:So will this be the demise of their ... by Whomp-Ass · · Score: 2, Informative

      All projectiles (including missiles) are ballistic in nature. There is a reason they're called "Ballistic Missles".

      A railgun projectile, acting as a cruise missile would, would simply be the same cruise missile without the propulsion system. The guidance system would be the same, the warhead would be the same, only the manner of providing the impulse would change.

    17. Re:So will this be the demise of their ... by coredog64 · · Score: 1

      No, only ballistic missiles are ballistic in nature. An ICBM (Intercontinental Ballistic Missile) uses all it's thrust at the beginning of it's flight. After that it has only
      small thrusters for course correction. A cruise missile develops thrust over the entirety of it's flight.

      Back to the nP post. While the naval railgun is advertised as having the "punch" of a BGM-109 cruise missile, it's range is only 200mi, a far cry from the 600mi range of the BGM-109.

      Maximum speed for the railgun projectile is M7.5. Assuming my math is correct, that's 1.5mi/sec. Absolute best time-to-target (i.e. assuming you could get a direct non-ballistic course) is two minutes.
      That's more than enough time for wind to have an effect on the projectile as well as more than enough time for a mobile target to move out of range. You were saying?

  19. Dude... by Anonymous Coward · · Score: 4, Funny

    After the war, torture, Gitmo, NSA's unwarranted wiretapping and all the other crap that has made me ashamed to be an American, I'm glad that we can even for one brief moment have something cool like this.

    Yeah, sure, we'll probably sad when they end up used to blind baby seals or to violate the Geneva convention (again), but quit ruining the moment, dammit. You made me misread "cherry truck" as "Cheney truck" and I was afraid I'd get zapped in the face by it.

    1. Re:Dude... by ArcherB · · Score: 1

      You made me misread "cherry truck" as "Cheney truck" and I was afraid I'd get zapped in the face by it.

      I'm a Republican and I found that statement friggin hilarious! Good job!

      --
      There is no "I disagree" mod for a reason. Flamebait, Troll, and Overrated are not substitutes.
    2. Re:Dude... by Nutria · · Score: 0, Flamebait
      or to violate the Geneva convention (again)

      How can you violate the Geneva Convention in a war against a country that hasn't signed the Geneva Convention?

      --
      "I don't know, therefore Aliens" Wafflebox1
    3. Re:Dude... by jswigart · · Score: 2, Interesting

      As I recall the Geneva Convention is a promise that your country will not engage in certain things, period, and isn't conditional on whether the other side also does. Am I wrong?

      Whether that's 'fair' or not is another issue altogether. Personally I think as the 'better man' as a country we should stick to those rules on principle. It's unfortunate that the scum on the other side exploit our general unwillingness to break the rules.

    4. Re:Dude... by VagaStorm · · Score: 4, Informative
      Because the Geneva Convention states that any country who has signed it is bound by it even if fighting others that have not:
      From http://www.icrc.org/ihl.nsf/FULL/365?OpenDocument

      "Although one of the Powers in conflict may not be a party to the present Convention, the Powers who are parties thereto shall remain bound by it in their mutual relations."
    5. Re:Dude... by Jesterthe3rd · · Score: 1

      Simple: You fight a war against a country which didn't sign the treaty (which is only possible during a certain time following the conference) but instead acceded it later (1956 in the case of Iraq).

    6. Re:Dude... by howlingmadhowie · · Score: 2, Interesting

      a propos being zapped in the face by cheney: http://www.youtube.com/watch?v=ggecq52sbR0 (in case you don't already know it)

    7. Re:Dude... by Fishead · · Score: 1

      (SARCASM)

      Are you saying that we SHOULDN'T use these truck mounted LASER beams to melt parachutes of pilots that were shot down? dang... cancel my order...

    8. Re:Dude... by Da+Fokka · · Score: 4, Insightful
      How can you violate the Geneva Convention in a war against a country that hasn't signed the Geneva Convention?

      By being a country that has signed the Geneva convention, like the US, Afghanistand and Iraq.

    9. Re:Dude... by DynamicLynk · · Score: 0, Troll
      If your ashamed to be an American, then America is ashamed to have shed blood for your freedom...nuff said.

      After the war, torture, Gitmo, NSA's unwarranted wiretapping and all the other crap that has made me ashamed to be an American, I'm glad that we can even for one brief moment have something cool like this.

      Yeah, sure, we'll probably sad when they end up used to blind baby seals or to violate the Geneva convention (again), but quit ruining the moment, dammit. You made me misread "cherry truck" as "Cheney truck" and I was afraid I'd get zapped in the face by it.
    10. Re:Dude... by Anonymous Coward · · Score: 0

      I know I certainly didn't ask it to shed blood for me.

    11. Re:Dude... by AdmiralWeirdbeard · · Score: 2, Insightful

      Also, behaving in a manner contrary to the Geneva Convention releases signatory countries from the requirement that *they* abide by it in conflicts with you. So its basically in everyone's best interest to treat it as law.

      Also also, not torturing people is awesome. It should be done for its own sake.

      --
      Come read my stupid blagablog. Rants and Giggles
    12. Re:Dude... by mrvan · · Score: 1

      It states 'in their mutual relations'. Ie, if three powers are at war and one power is not a signatory, the other two are still bound in their treating of each others prisoners. The quote does not say that they are bound with respect to the third power.

    13. Re:Dude... by Bastard+of+Subhumani · · Score: 1

      and isn't conditional on whether the other side also does. Am I wrong?
      Yes. In WW2, Germany was a signatory, as were the US and Britain. The Soviet Union wasn't. Hence the Germans were quite fussy about who they surrendered to.
      --
      Only three things are certain; death, taxes, and apocryphal quotations - Ben Franklin.
    14. Re:Dude... by ticktickboom · · Score: 1

      Geneva Convention isnt cheney the one that said its for pansys? isnt bush the one that said it didnt mean shit? isntthe usa the oinly country not to let weapons inspectors in? we didnt break a rule, we jsut dont give a fuck about it. human rights...pffft! tehy might be a terrorist! if we torture a few thousdand and find someone who was planning on tailgating, using fear as a tool to get what they want, then we have succeeded!

    15. Re:Dude... by Ed_Pinkley · · Score: 1

      "Also also, not torturing people is awesome. It should be done for its own sake."

      OK, I have no mod point's but that is a pretty great line. Kudos.

      --
      "Long time listener, first time caller."
    16. Re:Dude... by Ed_Pinkley · · Score: 1

      Dang! "points" I meant points!

      If only there was some way to view my post before I submitted it. It would be like a button that would give you a "pre" viewing of the post. Oh wait...

      --
      "Long time listener, first time caller."
    17. Re:Dude... by Maxo-Texas · · Score: 1

      The America we shed blood for really started dying after Carter.

      Since then, it has become increasingly evil. I'm sure we tortured people in WW1 & WW2 as well. Difficult choices for difficult times. But we were not proud of it back then. The constitution meant something.

      Today our government is owned by corporations and serving corporate interests.

      --
      She was like chocolate when she drank... semi-sweet at first and then increasingly bitter.
    18. Re:Dude... by Anonymous Coward · · Score: 0

      Your logic is inverted there. Even though Germany was a signatory, that wouldn't have protected them from those who are not. It was *supposed* to protect others from them, however.

      Of course, it didn't. . .

    19. Re:Dude... by CrimsonAvenger · · Score: 3, Insightful

      As I recall the Geneva Convention is a promise that your country will not engage in certain things, period, and isn't conditional on whether the other side also does. Am I wrong?

      You're wrong. From Article 2, Chapter 1, of the 1st Geneva Convention of 1949:

      Although one of the Powers in conflict may not be a party to the present Convention, the Powers who are parties thereto shall remain bound by it in their mutual relations. They shall furthermore be bound by the Convention in relation to the said Power, if the latter accepts and applies the provisions thereof.

      Note that you're bound to respect the Convention if your opponent is a signatory, OR if your opponent is not a signatory, but chooses to follow the Convention anyway.

      Note further that most, if not all, of the instances of the USA violating the Geneva Convention in the current troubles are violations of the 1st, 2nd, or 3rd Additional Protocols of the Convention, none of which the USA are signatory to (which means they're not bound by them).

      --

      "I do not agree with what you say, but I will defend to the death your right to say it"
    20. Re:Dude... by anshee · · Score: 2, Funny

      By being a country that has signed the Geneva convention, like the US, Afghanistand and Iraq. And all the time it was so easy :-)
      `/etc/init.d/Afghanistand stop`
    21. Re:Dude... by Alaskan · · Score: 1

      The terrorists of the world that hate the United States for our many freedoms appreciate your comments and love you for them. You give aid and comfort to our enemies with posts like yours, and in my book that makes you a traitor. Do you get your info from hate filled leftist websites? (filled with venom, obscenities and hatred for all things American.) I am proud to be an American, and your views are in the minority. Get your facts straight before you rant against the country you probably claim to love. Consider the weight of your words before you embolden our enemies. "blind baby seals" What a twit!

    22. Re:Dude... by Anonymous Coward · · Score: 0

      America is crying alone in a corner now because you've wasted her precious blood shed for you by posting stupid comments. Nice going, jerk!

    23. Re:Dude... by jswigart · · Score: 1

      Interesting, thanks. Learn something new every day.

  20. Um, what? by Spy+Hunter · · Score: 2, Insightful

    The danger isn't just to personnel: during 2005, two RAF Harrier jets were knocked out on the ground when their Kandahar airbase was rocketed.
    You mean not only are they slaughtering our troops, but they might conceivably injure our Harriers? Something must be done immediately!

    Seriously, WTF?
    --
    main(c,r){for(r=32;r;) printf(++c>31?c=!r--,"\n":c<r?" ":~c&r?" `":" #");}
    1. Re:Um, what? by couchslug · · Score: 1

      Protecting weapons can be as vital as protecting people. They aren't assigned the emotion-driven value given people, but functionally they may be worth more.
      For example, an aircraft carrier is "worth" far more than one human if the metric is military effectiveness.
      As the trend toward extremely expensive force-multiplier weapons continues (driven by the desire to reduce own casualties) the value of the individual weapon increases. An old Harrier may not be "worth" a human. A B-2 is. functionally, worth many.
      We don't want to value humans so lightly that we use them for VBIED guidance systems, but every military mission requires weighing human loss against potential gain.

      --
      "This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
  21. Re:Sharks by Anonymous Coward · · Score: 0

    lol laser sharks!

  22. Pfft.... by cyberise · · Score: 0, Redundant

    Call me when there are shark-mounted laser guns.

  23. For shooting down incoming artillery, rockets etc? by Anonymous Coward · · Score: 0

    Nay, Bush will use them to shoot you, and your family!

  24. I thought that was Strogg technology by Anonymous Coward · · Score: 0

    I thought Strogg use lasers for anti arty.
    GDF uses projectile turrets.

    Oh, sorry, wrong forum. I've got only one thing on my mind.

  25. Set lazers from stun... by xgr3gx · · Score: 1, Funny

    to drain budget!

    --
    Shameless plug alert: Game server control panel
  26. MTHEL? by Lazarian · · Score: 3, Informative

    Why don't they just work with the already tested MTHEL system?

    1. Re:MTHEL? by BlueParrot · · Score: 2, Interesting

      Are you sure it isn't in fact a follow-up to the THEL ? Also, iirc the THEL used deuterium to power its pumping, which could make it rather expensive. The breakthrough will be when they manage to get solid state lasers ( like Neodynium-YAG ) working like this. I imagine the Israelis will be quite interested in buying a few such devices.

    2. Re:MTHEL? by Lazarian · · Score: 1

      Reading up on THEL further, it is being developed by Northrop-Grumman and Israeli companies. Boeing may want to develop their own design. The article seemed a "been there, done that" sort of thing, but there's probably lots of reasons for designing an alternate system.

      Pretty impressive technology though.

    3. Re:MTHEL? by ireallylovelinux · · Score: 1, Interesting

      This was from the youtube video posted later on.
      THEL (Tactical High Energy Laser)
      For years, chemical-powered lasers were seen as the only viable alternative for weapons-strength ray guns. The most promising of those systems, the Tactical High Energy Laser, successfully shot down dozens of rockets and mortars. (this video shows it in action.) But generating the THEL's megawatts of laser power required hundreds of gallons of toxic chemicals -- ethylene, nitrogen trifluoride. The weapons grew bulky (the small-scale version was only supposed to be kept in a mere right cargo containers, each 40 feet long). Worse, after a few shots, the lasers would have to be resupplied with a fresh batch of reactants. The logistics of hauling those toxins either through the air or across a battlefield made generals shiver. So, ultimately, interest swung back to solid state systems, like Yamamoto's, and, to a lesser extent, free electron lasers.

    4. Re:MTHEL? by BlueParrot · · Score: 1

      Indeed. As part of my degree I did some suff on lasers, and simply put I am damn impressed they got something like that to work. The number of things that can go wrong preventing such a setup from working are overwhealming. As far as high-tech is concerned this is definately one of those things you could sort of imagine on paper but didn't expect in practice.

    5. Re:MTHEL? by lelitsch · · Score: 1

      Or how about using AHEAD? It actually works, is available now, and is evolutionary technology rather than some pie in the sky project.

      This freaking laser beams on freaking trucks sounds a lot like Northrop's Nautilus project which ended in abject failure.

    6. Re:MTHEL? by salec · · Score: 1

      Also, iirc the THEL used deuterium to power its pumping, which could make it rather expensive. The breakthrough will be when they manage to get solid state lasers ( like Neodynium-YAG ) working like this.

      But, chemical power is what makes the weapon autonomous. Go solid state and you'll have to carry around generator and fuel for it. Besides, how fast can you produce laser-usable energy from classic fuel? It is similar trade-off like between classical explosive-propelled artillery and rail guns. If you have hefty electric power source, like i.e. on the large battle ship, you may consider the option of rail gun. If not, you are better off with stored chemical energy quanta - the ammo.

      Perhaps in the future someone will invent universal disposable/recyclable fast power cells - some objects of enormous electrical capacity which, when triggered somehow, virtually instantly fills up by an undergoing fast chemical process. Then we will be able to use these in laser- or rail- weaponry, as well as in emergency tools, winches, jacks, air compressors, etc. I can imagine that, like ammo today, it will still be dangerous to store and handle, though.
  27. It Moon Patrol! by The+Null+Repeater · · Score: 1

    I think too many people in the military were playing moon patrol as kids.

  28. No, that's the adolescent in you. by Ungrounded+Lightning · · Score: 4, Insightful

    The adult in me says ... Guns of destruction are bad.

    No, that's the adolescent in you that says that. It wants to stop killing, hurting, and threatening, and goes after a tool that is capable of such things.

    But once you've had enough time and thought to understand the unintended consequences of the simple "solution" - disarming the law-abiding - you'll reach the adult understanding that self-defense requires force, and that a credible threat of retaliatory force produces a net reduction in killing, hurting, and threatening.

    "Mutual Assured Destruction" works at both the wholesale level (having prevented an all-out nuclear war for over half a century now) and the retail level (convincing crooks they want to leave you alone and either go after an easier victim or find a new line of work.)

    Second-order effects often swamp first-order effects, producing (initially) counter-intuitive results. Part of growing up is learning which situations are like that, and what the useful counter-intuitive solutions are. (To people with less experience this is often mistaken for wisdom, cynicism, or evil.)

    Unfortunately there is a significant fraction of the population that either never DOES grow up or never learns some important lessons about rare, but deadly, situations.

    --
    Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
    1. Re:No, that's the adolescent in you. by Stanistani · · Score: 0, Flamebait

      There's also that part of the population that leaves their guns lying around where toddlers can reach them, grabs them when they're angry at the neighbors, or doesn't lock them up at all, and they get stolen, no doubt by leftist gun-confiscators.

      Police that group and I'll listen to your Limbaugh-esque insinuations.

    2. Re:No, that's the adolescent in you. by coredog64 · · Score: 0, Flamebait

      Pools and pickle buckets kill more toddlers than toddlers finding loaded weapons. Maybe, just maybe, if we would leave the second amendment alone the NRA could go back to doing what they're good at (gun safety training) and we could actually have the NRA teach gun safety in school.

    3. Re:No, that's the adolescent in you. by Ungrounded+Lightning · · Score: 1

      There's also that part of the population that [horror images deleted]

      You might find it instructive, before parroting those urban myths and stereotypes, to do a little research on the actual number of people hurt or killed in such incidents per year.

      Then ask yourself if preventing such such a vanishingly small number of lives and injuries is worth actually having the enormously greater number that were prevented by with-gun self-defense in the same period.

      Of course that's the sort of thing an adult would do. Which brings us back to the "grandfather post". B-)

      --
      Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
    4. Re:No, that's the adolescent in you. by Achromatic1978 · · Score: 1

      Very true. That's why most jurisdictions mandate the use of pool fences and safety locks. Regulation. I'm pretty sure that wasn't what your ill-thought counterpoint intended, but nonetheless.

    5. Re:No, that's the adolescent in you. by Anonymous Coward · · Score: 1, Insightful

      As opposed to banning pools.

    6. Re:No, that's the adolescent in you. by Stanistani · · Score: 1

      I'm not who you think I am. I'm a target shooter. I have hunted. I have promoted the NRA's safety classes (Eddie Eagle). I'm in favor of jackasses storing their guns safely and the rest of the community compromising on sane regulation of weapons.

    7. Re:No, that's the adolescent in you. by Ungrounded+Lightning · · Score: 1

      I'm in favor of jackasses storing their guns safely and the rest of the community compromising on sane regulation of weapons.

      I'm in favor of compromising on regulation of weapons, too.

      I'm willing to compromise on only repealing or striking down HALF of the regulations on weapons.

      This year.

      Regulations on training, storage, etc. serve merely to lower the bar to the level required by regulation. The mandatory minimum becomes the effective maximum. In their absence people typically seek training on their own until they believe the have learned enough - and are generally trained to a far higher level of proficiency and indoctrinated with far better habits of safety in gun handling and storage, than the proposed laws require.

      (Except, of course, for the trojan horse laws (such as DC's) that are disguised gun bans which work by creating requirements that are impossible to achieve, prohibitively expensive, would render guns useless if obeyed, or are entrapment mechanisms.)

      --
      Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
    8. Re:No, that's the adolescent in you. by Stanistani · · Score: 1

      *sigh*
      Ok, I'm going over there and watch, as I have been for some time now, while you and your type dig your heels in, refuse to admit there's a massive gun ownership problem in the United States, and one day the anti-gun leftists will come and take them away from everybody.

      Then you'll be happy. You can go join the "well-regulated" Michigan Militia. In Gitmo.

      Building a consensus in this country would work better.

      Don't bother to respond. I give up. Might as well sell my stuff while I can.

    9. Re:No, that's the adolescent in you. by Anonymous Coward · · Score: 0

      I give up. Might as well sell my stuff while I can.

      Watcha got? I might be interested in buying :)

  29. You are no longer of any use to me by Anonymous Coward · · Score: 2, Funny

    I want five megawatts by mid-may.

    1. Re:You are no longer of any use to me by Anonymous Coward · · Score: 0

      ONE POINT TWO GIGAWATTS!?

      A BOLT OF LIGHTNING!

      (Lameness filter encountered. Post aborted! Don't use so many caps. It's like YELLING.)

    2. Re:You are no longer of any use to me by Martin+Blank · · Score: 1

      No, the lameness filter zoomed in on your appallingly incorrect quoting.

      --
      You can never go home again... but I guess you can shop there.
    3. Re:You are no longer of any use to me by MrNaz · · Score: 4, Funny

      Let's do the math, just coz I'm bored.

      The specific heat capacity of stainless steel is 500j/Kg and from this site I'm going to assume the specific heat capacity of the explosive is the same as "sandy clay" (poor assumption, but this is /. and I can't be bothered doing more research) which is 1381j/Kg.

      Lets assume a 5Kg mortar is 40% propellant, 30% explosive and 30% shell, and that you don't have to heat the propellant. The specific heat capacity of a 2.5Kg object with a 50/50 mix of steel and clay by weight is given by:

      (2.5 / 2) * 0.5(500 + 1381) = 2351.25 Kj/K/Kg

      Lets also say we want to heat the thing from ambient (35 degrees Celcius, coz remember we're in the desers of Iraq) to 100 degrees (I have no idea about explosives, despite the fact that I am a Muslim) in order to detonate it.

      100 - 35 = 65 degree delta

      Assuming that all energy is absorbed evenly, the formula for energy required is:

      e = 65K(delta) * 4.7025 Kj/K/Kg
      = 152.83125 Kj

      Given that watts are a measure of joules per second, assuming you have a quarter of a second "paint time" of the laser on the round, your lazer will need to emit:

      (1/0.25) * 152.83125 Kj
      = 611.325 W

      (Please note: My assumptions are completely bullshit and this figure is probably way off, but it was fun doing them anyway.)

      To put this into perspective, a 20g chocolate biscuit yeilds about 2,200 Kj. So really, forget the billion dollar laser program, just start lobbing chocolate biscuits at your enemy.

      If this post wasn't bizarre enough, if you lob that chocolate biscuit fast enough at your enemny for e = mc^2 to come into play, then that same chocolate biscuit will yield:

      e = 0.02 * (3*10^8)^2
      = 1,800,000,000,000 Kj

      Just sayin'.

      --
      I hate printers.
    4. Re:You are no longer of any use to me by Anonymous Coward · · Score: 0

      1.21 gigawatts wasn't it?

    5. Re:You are no longer of any use to me by TropicalCoder · · Score: 1

      Lets also say we want to heat the thing from ambient (35 degrees Celcius, coz remember we're in the desers of Iraq) to 100 degrees

      I think you're missing something here. Shells fired from guns get nearly white hot from their high speed passage through the air. Now, this applies more to canon fire from big guns like ship-to-shore. I am sure a morter round doesn't get anywhere near as hot, but certainly it is hotter than you suggest. There undoubtedly will be Slashdot readers who will be able to tell us how hot. The point is, many posts wonder about the effectiveness of a brief laser beam on a spinning shell, but we need to realize that that shell may already be near to the limit of the heat it can tolerate.

    6. Re:You are no longer of any use to me by MrNaz · · Score: 1

      Perhaps. I also assumed they only needed a 65K delta to explode, 100-35. You're probably right, they are probably already hotter than ambient, but with mortar rounds which are gas propelled, I doubt much hotter.

      The really big mistake I think I'm going to find (if anyone who knows anything about this stuff) is the detonation temp. I'm pretty sure that the stuff won't be exploding at 100, or else spilling a kettle onto the shells would blow them up. I suspect it's far, far higher.

      But as I said, I was pushing wild assumptions into the formulas, so meh :P

      --
      I hate printers.
  30. Dual use? by Lurker2288 · · Score: 4, Funny

    Have any trials been done on using the laser to fill a snide professor's house with popcorn? There could be a big market for this among the college crowd.

    1. Re:Dual use? by Anonymous Coward · · Score: 0

      that was such an awesome movie... Well sortof

    2. Re:Dual use? by thefekete · · Score: 1

      That would take a real genius

      --
      The cool things is to have windows that bounce up and down like a good tits.
    3. Re:Dual use? by Anonymous Coward · · Score: 0

      Combine it with naval rail guns.
      then you can shoot the popcorn from a long distance and have it expand as it enters the professors house.

  31. Re:How do clouds of popcorn change this? by ArcherB · · Score: 3, Funny

    You make an excellent point. All the enemy needs to do is first fire a barrage of Jiffy Pop popcorn. when the laser hits it, the corn pops and rains down on the target. This should be sufficient in preventing the laser from knocking out the REAL rounds, which are fired second.

    Hey, it works when fired from a satellite!

    --
    There is no "I disagree" mod for a reason. Flamebait, Troll, and Overrated are not substitutes.
  32. YouTube video of prototype by Anonymous Coward · · Score: 2, Interesting

    Here is a youtube link of a prototype system. It can track and destroy more than one target in flight before impact. I know there is a longer version of this video, but I found this one first, you'll get the idea. The longer one shows it engaging artillery shells, rockets, and mortar shells.

    http://www.youtube.com/watch?v=nVxZ9IHTH2E

    1. Re:YouTube video of prototype by Aetuneo · · Score: 1

      Interesting, but there's one thing that I'm worried about in that video: all of the shots of TEHL, with the dramatic music in the background. I feel an urge to scream "WORSHIP THE MACHINES!"

      --
      Everything is subjective.
    2. Re:YouTube video of prototype by dbIII · · Score: 1

      That's a good sign that it may actually work. The next thing is to get indepenant people to run the tests under supervision to see if it is actually real and not a scam like the Israeli ray gun that never actually managed to hit any of those thirty year old Iranian rockets that Hizbolla had.

    3. Re:YouTube video of prototype by Anonymous Coward · · Score: 0

      Fucking SWEET.

  33. What about using the lasers against infantry? by sponglish · · Score: 1

    They don't mention using the truck lasers as anti-personnel blinding weapons in the article (probably because that would be against international law?) but I'm sure that's what would happen if a position was being overrun. Hard to imagine how infantry could defend against a beam powerful enough to zap artillery shells, certainly sunglasses wouldn't work, maybe welding goggles? Like using gas in WWI, the element of surprise might save the day one time (imagine if MacArthur had had these lasers when the Chinese People's Volunteer Army swarmed across the Yalu in the Korean War), but eventually both sides would have the weapons and it would be suicidal to cross a no-man's land under those circumstances. War has become far too deadly for fragile wetware, so now that the U.S. is fielding squadrons of drone aircraft, isn't it time to develop Wii-Remote Controlled T2000 combots? Talk about yer first-person shooters!

    --
    "I improvise. It's my greatest talent. I prefer situations to plans..." --Wintermute, William Gibson's "Neuromancer"
    1. Re:What about using the lasers against infantry? by Anonymous Coward · · Score: 0
      Hard to imagine how infantry could defend against a beam powerful enough to zap artillery shells, certainly sunglasses wouldn't work, maybe welding goggles?

      Maybe, uh, looking the other way?!?

    2. Re:What about using the lasers against infantry? by jcr · · Score: 1

      The idea occurred to me a while ago of using a laser as an anti-sniper countermeasure. Upon detecting an incoming bullet with mm-wave radar, you'd shine a laser at the bullet's probable point of origin, at an intensity such that you'd see a very uncomfortably bright flash if you're looking towards it, but if you're looking through a scope or a pair of binoculars, you lose an eye.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    3. Re:What about using the lasers against infantry? by Neon+Aardvark · · Score: 1

      Use of lasers to blind soldiers is against the geneva convention. Unsurprisingly people have thought of this before you.

      --
      Azural - instrumentals
    4. Re:What about using the lasers against infantry? by sconeu · · Score: 1

      Against the Geneva Convention.

      You can not deliberately attempt to maim. You can try to kill, and maim as a side effect of a failed kill.

      Also, with the strength of this laser, you'd have fried brains along with the blinded eye.

      --
      General Relativity: Space-time tells matter where to go; Matter tells space-time what shape to be.
    5. Re:What about using the lasers against infantry? by The_mad_linguist · · Score: 1

      Fried brains would kill them, right? Problem solved.

    6. Re:What about using the lasers against infantry? by jcr · · Score: 1

      Against the Geneva Convention.

      Which applies to troops in uniform, of nations who are signatories to the convention.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    7. Re:What about using the lasers against infantry? by RollingThunder · · Score: 1

      Which applies to troops in uniform, of nations who are signatories to the convention.

      Which last I checked, included the US Army and the United States.

      It's not a bilateral agreement. Your side can still be in violation even if the other side is not a signatory.

    8. Re:What about using the lasers against infantry? by Dunbal · · Score: 1

      Some countries ignore international treaties and conventions when it suits them. Haven't you noticed?

      --
      Seven puppies were harmed during the making of this post.
    9. Re:What about using the lasers against infantry? by Dunbal · · Score: 1

      Which last I checked, included the US Army and the United States.

            Which has a history of violating numerous international trade, human rights and other conventions. Shooting at insurgents' "canteens" (do they even carry them?) with .50 cal machine guns is a weak excuse for violating the very same Geneva convention you mention.

            Who is going to force the US to comply? No one. I can hardly blame them either. The rules are written by the strong. However it sets a precedent, for continual eternal strife. "Because you did it, so can we". Oh well, human history as usual.

      --
      Seven puppies were harmed during the making of this post.
    10. Re:What about using the lasers against infantry? by Dunbal · · Score: 1

      Maybe, uh, looking the other way?!?

            I see that your reaction time is faster than the speed of light. Well done. But then again, maybe you have a point.

            Squad - about FACE! Not exactly the best axis to defend yourself from the incoming enemy.

      --
      Seven puppies were harmed during the making of this post.
    11. Re:What about using the lasers against infantry? by jcr · · Score: 1

      Your side can still be in violation even if the other side is not a signatory.

      If the other side is abiding by the terms.

      -jcr

      --
      The only title of honor that a tyrant can grant is "Enemy of the State."
    12. Re:What about using the lasers against infantry? by sponglish · · Score: 1
      Neon Aardvark (967388):

      Use of lasers to blind soldiers is against the geneva convention. Unsurprisingly people have thought of this before you.
      Your mild sarcasm was wasted, I acknowledged in my point that using the weapons to blind was against the law:

      They don't mention using the truck lasers as anti-personnel blinding weapons in the article (probably because that would be against international law?) but I'm sure that's what would happen if a position was being overrun.
      My point was that the truck mounted lasers would be used as a last-ditch defense, international law or no, and that they'd be nearly unbeatable against infantry. A beam that can destroy an incoming artillery shell can just as easily boil eyeballs and brains, whether the victim's head is turned away or not.
      --
      "I improvise. It's my greatest talent. I prefer situations to plans..." --Wintermute, William Gibson's "Neuromancer"
    13. Re:What about using the lasers against infantry? by jsoderba · · Score: 1

      Given that you're allowed to fire 155 mm artillery shells at enemy troops, what makes you think that you're not allowed to fire 12.7 mm projectiles at them? Are you one of those morons who believe that shotguns are prohibited too?

    14. Re:What about using the lasers against infantry? by Bastard+of+Subhumani · · Score: 1

      You can not deliberately attempt to maim. You can try to kill, and maim as a side effect of a failed kill.
      Couldn't you blind them then quickly bayonet them (wouldn't be too hard), then claim you bayoneted them first? Who'd know?
      --
      Only three things are certain; death, taxes, and apocryphal quotations - Ben Franklin.
    15. Re:What about using the lasers against infantry? by couchslug · · Score: 1

      The weapons are still "line-of-sight" (pun inevitable), so they would be severely limited in closed terrain and cities.
      Beam weapons don't spit fragments, produce blast waves, etc. They will be just another tool in the toolbox.

      --
      "This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
  34. MTHEL already tested against multiple mortars by vg30e · · Score: 3, Informative

    The Laser in the article is a development of the MTHEL project. The purpose of MTHEL is to defend positions against incoming rockets and mortars. One of the test videos actually shows the MTHEL hitting 3 different mortar rounds launched from 3 different positions all traveling through the air at the same time.

  35. cereal commercial by davidwr · · Score: 1

    Ever watch a commercial for Kellogg's Frosted Mini-Wheats.

    The adult in me says ....
    The kid in me says ....

    --
    Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
  36. Generals gathered in their masses... by Anonymous Coward · · Score: 0, Insightful

    Just like witches at black masses
    Evil minds that plot destruction
    Sorcerers of death's construction
    In the fields the bodies burning
    As the war machine keeps turning
    Death and hatred to mankind
    Poisoning their brainwashed minds, oh lord yeah! ...

    (Black Sabbath)

    1. Re:Generals gathered in their masses... by Anonymous Coward · · Score: 0

      someone has been playing to much GH II ;-)

    2. Re:Generals gathered in their masses... by Anonymous Coward · · Score: 0

      A (negative) comment about war machines is off-topic in an article about war machines? You people are sick.

  37. Car Wars! by Curate · · Score: 2, Funny

    Could this be the first step towards a future of heavily-armoured and -armed cars and trucks, complete with laser cannons and oil slick emittors, like in Steve Jackson's Car Wars game?

  38. Re:How do clouds of popcorn change this? by Cpt_Kirks · · Score: 1

    Hey, it works when fired from a satellite! [imdb.com]

    B1 Bomber, not a satellite. The "sales clip" was of a little shuttle-like craft, but the actual test used a B1.

  39. Re:How do clouds of popcorn change this? by Chris+Burke · · Score: 4, Funny

    All the enemy needs to do is first fire a barrage of Jiffy Pop popcorn. when the laser hits it, the corn pops and rains down on the target. This should be sufficient in preventing the laser from knocking out the REAL rounds, which are fired second.

    So would this be called Jiffy Chaff?

    --

    The enemies of Democracy are
  40. It won't work... by lord_mike · · Score: 1

    ...it's been tried before, a long, long time ago... in a galaxy far, far away...

    INTERIOR: DEATH STAR.

                    Walls buckle and cave in. Troops and equipment are blown in
                    all directions. Stormtroopers stagger out of the rubble.
                    Standing in the middle of the chaos, a vision of calm and
                    foreboding, is Darth Vader. One of his Astro-Officers rushes
                    up to him.

    ASTRO-OFFICER: We count thirty Rebel ships, Lord Vader. But they're so
    small they're evading our turbo-lasers!

    VADER: We'll have to destroy them ship to ship. Get the crews to their
    fighters.

    INTERIOR: DEATH STAR.

                    Smoke belches from the giant laser guns as they wind up their
                    turbine generators to create sufficient power. The crew rushes
                    about preparing for another blast. Even the troopers head gear
                    is not adequate to protect them from the overwhelming noise of
                    the monstrous weapon. One troopers bangs his helmet with his
                    hand in an attempt to stop the ringing.

    1. Re:It won't work... by Anonymous Coward · · Score: 0

      Officer to the Grand Off Target: "Sir, there IS a danger..."

      Grand Off Target: "Abandon ship in our hour of glory? I hardly think - "

      BLAM!

      'Nuff Said.

  41. Very useful (defensive) weapon by mi · · Score: 1

    Today it takes a dedicated 20-ton truck. In three years, there will be a Bradley-mounted design. In 10 or 20, these things would be mounted on helmets to protect individual soldiers.

    Stop counting other people's money (CEOs') and rejoice at the progress your side of the war is making.

    --
    In Soviet Washington the swamp drains you.
    1. Re:Very useful (defensive) weapon by Xeth · · Score: 1

      Stop counting other people's money (CEOs') and rejoice at the progress your side of the war is making.
      Hell, if it were just money, I wouldn't care. The problem is that moneyed interests tend to do subversive things that I alluded to in my initial posts. They corrupt the political system. They could sail on yachts all day and I wouldn't give a damn. I get upset when they start making congress pass bad laws.
      --
      If your theory is different from practice, then your theory is wrong.
    2. Re:Very useful (defensive) weapon by FiloEleven · · Score: 0, Flamebait

      Some of us choose not to rejoice in war at all. Some of us are looking for a better way.

    3. Re:Very useful (defensive) weapon by mi · · Score: 3, Funny

      I get upset when they start making congress pass bad laws.

      Boeing are a member of neither RIAA nor MPAA. What's the problem?

      --
      In Soviet Washington the swamp drains you.
    4. Re:Very useful (defensive) weapon by mi · · Score: 4, Insightful

      Some of us choose not to rejoice in war at all. Some of us are looking for a better way.

      False dichotomy. You can rejoice at some aspect of a war (such as fewer deaths), while still looking for "a better way".

      --
      In Soviet Washington the swamp drains you.
    5. Re:Very useful (defensive) weapon by Pyrrus · · Score: 1

      The MPAA and RIAA are not the only groups lobbying for laws that are in their own self-interest. Eisenhower had something to say about this...

    6. Re:Very useful (defensive) weapon by Anonymous Coward · · Score: 0
      sigh - think about the energy density required for these things, they wont be sitting on helmets anytime soon

      And, um, have you noticed? the other side doesn't actually have any missiles

      this is pork pure and simple

    7. Re:Very useful (defensive) weapon by ElectricRook · · Score: 1
      We could always capitulate to the extremists... They've already laid out the demands for our surrender.

      What do I care if:

      Men can't vote for our government anymore, and Women can't vote at all.

      We can't choose our religion. Islam is good enough for me.

      Women can't drive cars, be educated, dress as they like, or leave the house without an escort.

      /SARCASM

      That's pretty much what we are fighting against in the war on terror... Basically the same stuff the American revolutionary war was fought over. Plus some basic Women's equality.

      --
      - High Tech workers, please say NO to Union Carpenters, their Union sees fit to control our compensation.
    8. Re:Very useful (defensive) weapon by Dunbal · · Score: 1

      these things would be mounted on helmets to protect individual soldiers.

            Yeah the only problem is the 500 lb battery pack.

      --
      Seven puppies were harmed during the making of this post.
  42. Obligatory by hellfire · · Score: 2, Funny

    Yay... finally!!!

    Popcorn for everyone!!!

    --

    "All great wisdom is contained in .signature files"

  43. Quake 3? by Reddragon220 · · Score: 5, Funny

    So the Navy has railguns and the Army now has lasers - the Air force better get quad-damage or else they're going to get pwned.

    1. Re:Quake 3? by Anonymous Coward · · Score: 0

      Are you kidding?

      They still have their chain guns and rocket launchers.

  44. Fess up by suv4x4 · · Score: 4, Funny

    The High Energy Laser Technology Demonstrator project actually shoots stuff

    Who wrote that summary, George Bush?

  45. Will.... by Anonymous Coward · · Score: 0

    Dolphins drive them trucks?

  46. Slashup Mashup by alta · · Score: 3, Funny

    NEWSFLASH:

    Boeing has developed a new squirrel mounted laser. Lasers have been mounted to squirrels and released on the Iranian border. Unfortunatly the squirrels were all captured by iranian police, but not after they fried their eyes out.

    Cost? $50 million nuts.

    --
    Do not meddle in the affairs of sysadmins, for they are subtle, and quick to anger.
    1. Re:Slashup Mashup by Dunbal · · Score: 1

      SHARKS! When will they learn? You have to put the damned things on SHARKS!

      --
      Seven puppies were harmed during the making of this post.
    2. Re:Slashup Mashup by ThomsonsPier · · Score: 1

      That's a lotta nuts! /kungPow

  47. When can I get some of this tech? by kabocox · · Score: 2, Interesting

    Forget freaking sharks. I want something like this scaled down on top of my car aimed at birds that dare to poop at my car. I want anti-bird defensives that will fry 'em if they dare to do a fly by near my car.

    1. Re:When can I get some of this tech? by The_mad_linguist · · Score: 1
      Well, there's already been a prototype developed.

      http://www.guardian.co.uk/uk_news/story/0,3604,447 700,00.html

    2. Re:When can I get some of this tech? by AliasMarlowe · · Score: 1

      Forget the trucks, 747s, sharks and other clumsy platforms. Forget the incoming missiles, RPGs, seagulls, and other worthless targets.
      I want a version which fits on my baseball cap and which tracks and zaps mosquitos...

      --
      Those who can make you believe absurdities can make you commit atrocities. - Voltaire
    3. Re:When can I get some of this tech? by Qrlx · · Score: 2, Funny

      They already have that, it's called a garage.

  48. Re:How do clouds of popcorn change this? by Bucc5062 · · Score: 1

    I have 1 point left to give, but there was no option for +1 groan. Good one!

    --
    Life is a great ride, the vehicle doesn't matter
  49. Mod Parent UP! by Apostata · · Score: 1

    Car Wars...screw D&D, that was cool. And then, you know, we all found girls and stuff...but still. Car Wars rocked.

    --

    This wasn't just plain terrible, this was fancy terrible. This was terrible with raisins in it. - Dorothy Parker
  50. dogs by phrostie · · Score: 2, Funny

    Oooooooooooooh

    i need one of these for the dogs next door.

  51. MTHEL works, but is too bulky by Animats · · Score: 2, Interesting

    First, if you don't know about THEL, see this video. Beam weapons aren't a joke any more.

    Mobile THEL was a repackaging of the original fixed THEL system into three semitrailers. It's too bulky to deploy and too vulnerable on the ground. This thing is meant to defend against short-ranged mortars, rockets, and artillery. So it has to be sited up near the sharp end. Something more rugged and more mobile is needed.

    Now that everyone has seen THEL shooting down rockets, artillery projectiles, and mortar rounds, the name of the game is making it small enough to be useful. This new project is to get something onto a single large truck that will do the job.

  52. All this amazing machinery... by Anonymous Coward · · Score: 0

    ...and yet we cannot find Bin Laden, or defeat an enemy working on the cheap while we use $30K missles to blow up a tree. Why can't the world's greatest military power, using the best trained soldiers and the most expensive weapons, not beat an enemy using simple weapons?

    1. Re:All this amazing machinery... by Original+Replica · · Score: 1

      Why can't the world's greatest military power, using the best trained soldiers and the most expensive weapons, not beat an enemy using simple weapons?

      Because great big organizations are slow. We aren't going to even decide if The Surge is working until Septmeber. Then there will be discussions and debates on what to do. Meanwhile we are trying to fight against an enemy that makes a plan in the morning and executes it that afternoon. We can't go after anything stationary like their supply lines because that happens to be the same as the infrastructure of the country we are trying to "free". It's like you are boxing a smaller weaker opponent, but you are blindfolded and you get verbal instructions from someone watching on a video delayed monitor.

      --
      We are all just people.
    2. Re:All this amazing machinery... by Dunbal · · Score: 1

      Possibly the only time a guerrilla war has been "won" by a conventional army was by the Brits in Burma, last century. ALL others have been disastrous failures.

      --
      Seven puppies were harmed during the making of this post.
    3. Re:All this amazing machinery... by TheLink · · Score: 1

      Yeah you need proper counter-insurgency measures like the one in Malaya against the communists.

      --
  53. Can't I just make shiny bombs? by Joce640k · · Score: 2, Interesting

    What happens when a laser hits something really shiny? Does it bounce off and heat up something else?

    Is this a case of billions of investment being defeated by a rag and a can of polish?

    --
    No sig today...
    1. Re:Can't I just make shiny bombs? by sumdumass · · Score: 1

      Different shiny things reflect light differently. But just because it is being reflected doesn't mean it isn't absorbing the heat. Place a mirror in the sun and check how hot it gets. I'll give you a hint, it will heat up about as fast as other objects in the area.

      Now, the amount of reflection will have some bearing on how much heat is transfered but this isn't some comic strip. It will retain quite a bit of the heat. You cannot make make the assumption of it being defeated that easily. You have to take the type of metals being used, the effects on it form launching or propelling it at the target, anything that hits it mid flight, the range away it is targeted and quite a few other variables into consideration. I seriously doubt they didn't hire some other snot nosed knowitall like you who they the same blindly stupid comment out there. This had been discussed when the ground based lasers taking missiles out. It isn't as easy as you want to think.

    2. Re:Can't I just make shiny bombs? by YourMotherCalled · · Score: 1

      I guess it depends on how much energy is lost when the laser is reflected.

    3. Re:Can't I just make shiny bombs? by Photonic+Shadow · · Score: 1

      Which of course explains why the hoods of white pickup setting out in the Summer Sun in Texas are just as hot as the hoods of black pickups in the same situation. NOT.

      PS

    4. Re:Can't I just make shiny bombs? by sumdumass · · Score: 1

      There isn't a distinguishable difference when dealing with the amount of power these lasers are going to be using.

      As for the white verses black, they will become the same temperature at one point in time. The black hood will become warmer. The point was that there was a few degrees difference, it was that not all light energy is reflected off without having an effect. And that is the part that makes polishing the metals to a mirror finish idiotic. You won't defeat these with a rag and a can of polish.

    5. Re:Can't I just make shiny bombs? by Maxo-Texas · · Score: 1

      Not necessarily.

      Brilliant people overlook obvious things all the time.

      --
      She was like chocolate when she drank... semi-sweet at first and then increasingly bitter.
    6. Re:Can't I just make shiny bombs? by Joce640k · · Score: 1

      "Brilliant people overlook obvious things all the time.",/i>

      And military people lie about capabilities all the time.

      A lot of the time they do it purely justify their department's budget. I've sat in meetings where this was going on and nobody in the room was ashamed of what they were doing.

      Another obvious trick which occurs to me is to fill the air with chaff before you fire the real bombs. One air burst which releases 10,000 little pieces of tin foil should keep the laser busy for a while.

      --
      No sig today...
  54. Israel is also after them by Anonymous Coward · · Score: 0

    The reason Israel is cooperating heavily with the US on this project is because it'd be awesome for taking out the likes of Katyusha rockets as fired by Hezbollah and Hamas into Israel this last few years.

    People may whine and bitch about Israel, but let's face it, if Israel can prevent these random cross border attacks it's going to be so much easier brokering and keeping peace deals as it's often been these Katyusha and mortar attacks that have broken countless ceasefire deals.

    Perhaps so as not to let Hamas get away with attacks too lightly they could hook the thing up to Gaza's electricity supply so each time it has to fire at a rocket from Gaza it takes the electricity down there for half an hour to recharge ;)

  55. Ridiculous by Ancient_Hacker · · Score: 1

    Anti-artillery shell cannon??

    The numbers don't look good-- You have to precisely track the shell in flight
    with extreme accuracy. Any dust, fog or clouds and it's useless.
    Countermeasures are simple and cheap-- smoke, dust, chaff.

    And you're a very fragile sitting duck, with your beam revealing your position.

    Sounds like a typical Pentagon money-blowing project.

    1. Re:Ridiculous by AgentBif · · Score: 1

      The numbers don't look good-- You have to precisely track the shell in flight with extreme accuracy.

      Radar. You know, komputurs and stuff.

      Any dust, fog or clouds and it's useless.

      Useless? No. Reduced range? Perhaps. Most of the time in most places of interest you don't need to be concerned about completely dense fog or dust. So over 95% of the time at most locations worth protecting your high value asset is protected. The rest of the time you have to rely on what you used before.... like holes in the ground and logs over your head.

      And you're a very fragile sitting duck, with your beam revealing your position.

      I believe in most cases the wavelengths used are out of the visual spectrum. I'm not sure, but it is possible that these beams (or the resultant atmospheric effects) are not visible. On the other hand, the youtube video seemed to imply it was visible but it's not clear to me whether the camera showing that effect was pure visual spectrum with sensitivity of the human eye. Can someone daylight adjusted easily spot this thing when it's firing? Is it like a spotlight at night? I'm not sure. Maybe someone can pitch in.

      Anyway, most of the time these systems will be deployed to protect high value assets whose position is already known to the enemy (like an airbase or something). Besides, if the enemy is shooting artillery at you, it is somewhat likely that they already know you are there. Most of the time there's no secret to give away.

      --
      Privacy Statement: We value your privacy! It is very valuable. That's why we try to sell it whenever we can.
    2. Re:Ridiculous by Ancient_Hacker · · Score: 1
      The numbers don't look good-- You have to precisely track the shell in flight with extreme accuracy.

      >Radar. You know, komputurs and stuff.

      Yes, I know. But radar is far from accurate enough. Radar waves are slowed down by air density, bent and refracted by thermal layers, and slowed even more by humidity. For best accuracy you need short wavelength radar waves, which are strongly absorbed by moisture in the air. If the shell is a mile away, you need better than 0.02% accuracy in range, elevation, and azimuth, which is WAAY more accuracy than you're going to be able to get in the field.

      Any dust, fog or clouds and it's useless. >Useless? No. Reduced range? Perhaps.

      Useless, probably. Battlefields get mighty dusty after a few artillery barrages.

      And you're a very fragile sitting duck, with your beam revealing your position. >I believe in most cases the wavelengths used are out of the visual spectrum.

      Doesnt matter, every army with $40 has bought infrared scopes. >Anyway, most of the time these systems will be deployed to protect high value assets whose position is already known to the enemy (like an airbase or something).

      I was referring to the laser cannon being a sitting duck. A very high value target that gives away its exact position with megawatts of emission. It doesnt get much better than that.

  56. The truck they are using by Widowwolf · · Score: 2, Informative

    For all of you who dont know the HEMTT http://en.wikipedia.org/wiki/Heavy_Expanded_Mobili ty_Tactical_Truck/ are 20 ton trucks useful for providing transport capabilities for re-supply of combat vehicles and weapons systems..The HEMTT trucks exist in several configurations: M977 and M985 cargo trucks carry all types of equipment, especially ammunition. A crane is mounted at the rear of the vehicle. M978 tanker refuels tactical vehicles and helicopters in forward locations. M983 tractor tows the trailer-mounted MIM-104 Patriot missile systems. M983 with 30 KW generator and a crane mounted behind the cab towed the MGM-31 Pershing Erector Laucher in CONUS (a MAN tractor was used in West Germany). M984 recovery vehicle uses a lift-and-tow system to recover disabled vehicles in two-to-three minutes. It mounts a recovery winch, a crane and a large storage box. These things have great manuevering capabilities and can knock down several feet thick trees (We used to do it to make shaded parking spots when out on bivouacs.(That and you can make ranger brownies in the Exhaust pipe)

    --
    ~~"Of course, that's just my opinion. I could be wrong." ~~Dennis Miller
  57. Please define "stuff" by chord.wav · · Score: 1

    ...actually shoots stuff...

    Stuff as in photons or stuff as in water melons?

  58. Just in time... by crankyspice · · Score: 1

    For the 2008 production (2009 release date) of the Tango & Cash remake, timed to coincide with that nostalgia-filled movie's 20th anniversary! Wonder if Michael J. Pollard will reprise his role as Owen...

    --
    geek. lawyer.
  59. I really, really want one for my car, underhood by spineboy · · Score: 1

    It would be nice to have this under my car hood, with a pop-up cowl, so that it'd be stealth most of the time. Then have it pop up when you want to frag that slow moving Prius going 50 in the passing lane.

    Yeah - this would definitely be O.K.

    --
    ..........FULL STOP.
  60. Actually... by Anonymous Coward · · Score: 1, Interesting

    That'd be fine, because you'd be using the weapons to kill. They're fine with that. The problem would be using the lasers to *blind* those people. That's a violation.

    1. Re:Actually... by ozphx · · Score: 1

      Shooting at a parachutist in the air is exactly the kind of un-manly action I'd expect from you savages.

      --
      3laws: No freebies, no backsies, GTFO.
  61. Countermeasures: by jafac · · Score: 2, Interesting

    Pack a load of 10 shells, 9 chaff, 1 HE.

    First one is intercepted halfway to the laser truck, explodes, deploys chaff on detonation.
    Second one is intercepted halfway between previous interception, and laser truck, because truck's radar was impaired by chaff, second one explodes, deploys chaff on detonation, closer to truck.

    Lather, rinse, repeat, until the radar's range is too short to give the computer enough time to find an intercept solution.

    Cost to attacker: 9, $500 chaff shells, + 1 $2000 HE shell.
    Cost to defender: $50 Million laser + whatever else the attacker decides to shell with impunity next.

    --

    These are my friends, See how they glisten. See this one shine, how he smiles in the light.
    1. Re:Countermeasures: by jjohnson · · Score: 1

      Good luck convincing your artillery commanders to give 90% of their ammo carrying capacity and destructive force to chaff shells.

      --
      Anyone who loves or hates any language, platform, or manufacturer, doesn't know what they're talking about.
    2. Re:Countermeasures: by Anonymous Coward · · Score: 0

      Even easier: artillery consisting of right-angle mirrors.

      Credit to the popcorn-college movie cited earlier in the thread.

    3. Re:Countermeasures: by Dunbal · · Score: 2, Insightful

      Pack a load of 10 shells, 9 chaff, 1 HE.

      First one is intercepted halfway to the laser truck, explodes, deploys chaff on detonation.
      Second one is intercepted halfway between previous interception, and laser truck, because truck's radar was impaired by chaff, second one explodes, deploys chaff on detonation, closer to truck.


            So you've reduced your rate of fire by 90%, giving me plenty of time to locate, target and destroy your artillery before you can significantly damage my troops. Makes sense.

      --
      Seven puppies were harmed during the making of this post.
    4. Re:Countermeasures: by Dunbal · · Score: 1

      Even easier: artillery consisting of right-angle mirrors.

            You do know that shells are slightly larger than the diameter of the cannons they are shot from, right? This allows a hermetic seal so that the full force of the gases propel the shells out of the barrel. Yes some energy is lost in deforming the shell, but it is far less than what would be lost if the gases are allowed to escape around the shell.

            Try making a "right angle mirror" that will a) stay clean after being shot out of a gun and b) still be right-angled after going through the deformation process.

      --
      Seven puppies were harmed during the making of this post.
    5. Re:Countermeasures: by Telepathetic+Man · · Score: 2, Insightful

      Technically, wouldn't that be counter-countermeasures? Sorry to pick nits.

      Seriously though, chaff is usually just a bunch tin foil and other highly reflective materials. None of which would likely stay in the air long enough to make that much difference. Unless you have a lot of mortars or whatever, you might not have a fast enough rate of fire.

      --
      Just because you can, does not mean you should.
    6. Re:Countermeasures: by Anonymous Coward · · Score: 0

      At the very least you could launch blanks enough to discover the location of the truck. I'm sure a bullet could damage a 50 million dollar piece of equipment or a powder bomb followed by a real one. Who gives a shit that a bunch of smartasses want to believe that a laser cannon is invincible anyway. I think the salient point is that if you can convince your opponent to hemmorage billions of dollars then somebody loses something surely.

    7. Re:Countermeasures: by Anonymous Coward · · Score: 0

      Perhaps you missed that it's mounted to a truck...giving it maneuverability around the deployed chaff and out of the target zone. Not to mention that you could have multiple units deployed...and if they can get 9 shots off before someone either plinks them or hurls a hand grenade in their general direction, something's wrong. The mortar firing cowards employ shoot-and-run techniques (at least the ones that are still alive).

    8. Re:Countermeasures: by yada21 · · Score: 1

      Try making a "right angle mirror" that will a) stay clean after being shot out of a gun and b) still be right-angled after going through the deformation process.
      Launch them from a trebucket. Trebuckets rock!
      --
      I will have a sig when the market demands it.
    9. Re:Countermeasures: by Anonymous Coward · · Score: 0

      "right angle mirror"... Launch them from a trebucket. I just got a mental image of disco balls flying though the air.
    10. Re:Countermeasures: by jafac · · Score: 1

      I don't think it's pragmatic to use the word "coward" when discussing warfare in an age of ballistic missiles, stealth aircraft, and chemical, nuclear, or biological weapons. Really.

      Yes - the mortar guy's going to shoot and run, as a counter-counter measure to counterbattery techniques. Yes, they're already successfully employing these tactics, on a daily basis, in Gaza, Lebanon, and in Baghdad (now that they're getting away with shelling the Green Zone). This counter-countermeasure is cost-competitive with counterbattery techniques, because to employ counterbattery techniques, you have to A) have a counterbattery crew standing by, and B) they need to be able to react quickly and accurately enough to hit the attacker and C) they need to miss the surrounding civilians. (oops - should have thought of that before we got into this war, I guess). Since the cost of randomly blowing up civilians for the defender is too high (politically) - hit-and-run works.

      The truck-mounted laser is yet another countermeasure against light artillery.

      I'm merely proposing an additional counter-countermeasure, one that is probably very cost-competitive to the truck-mounted laser. Chaff won't linger in the air very long, so these 10 (or however many are needed) shots have to follow eachother very closely. Maybe so closely, it requires more than one mortar (which greatly reduces their accuracy). So that's an added "cost" to the counter-countermeasure. Combine the truck-mounted-laser with other counterbattery techniques, as well as UAV surveillance, and you may actually put a noticeable dent into the enemy's shelling activities.

      On the other hand, maybe we should have invaded with half a million or more troops, and secured all the ammo sites at the start of the war, so the insurgents wouldn't have gotten their hands on these weapons. That's what Petraeus (and Powell) recommended, and the Bush crew shot down.

      The moral of the story?:
      A $50 Million truck-mounted-laser is no substitute for common sense.
      (though, I still think it's neat-o!)

      --

      These are my friends, See how they glisten. See this one shine, how he smiles in the light.
  62. The major problem with rail guns ... by Joce640k · · Score: 1

    "The major problem with rail guns that they have yet to solve is that the rails themselves experience a repulsive force equal to the force accelerating the projectile..."

    And how do they intend to "solve" this little conundrum...?

    {insert sound of Scottish engineer here}

    --
    No sig today...
    1. Re:The major problem with rail guns ... by Anonymous Coward · · Score: 0

      By periodically replacing the rails.

    2. Re:The major problem with rail guns ... by Anonymous Coward · · Score: 0

      After every shot?

  63. lasers wouldnt have won vietnam either by Anonymous Coward · · Score: 0

    i do not think 'lasers' will solve iraq. lasers would not have solved vietnam either.

    first there are the technical issues. mortars are small fry. they are annoyance weapons to piss off people in the green zone. most people die there from IEDs and suicide bombs, which lasers are absolutely no help against.

    to stop suicide bombers and IEDs, you need to have an undersanding of culture, foreign languages, history, sociology, pscyhology, economics, etc.
    you have to find out why people are blowing themselves up, why people are planting IEDs, and more importantly, why
    others just sit by and watch them do it. then you have to attack those problems at the root.

    for example. let us consider the iraqi army. it was disbanded by the USians 'in charge'. this left hundreds of thousands of young, testosterone filled men, with nothing to do all day but sit around and be unemployed. not only that, they had easy access to weapons, and they had the training to use those weapons.

    i dont care how many episodes of 'future weapons' you watch or how many truck mounted lasers or how many linux based pilot-less drones you have. none of that will keep you from making dumb decisions like disbanding the iraqi army.

    and there were dozens of other decisions made by the 'technologically superior' US that basically did not help the overall situation at all. and many would say the decision to invade at all was a prime example of this problem.

    meanwhile we have a massive shortage of people who can speak arabic.

    so you argue that lasers are going to help solve iraq. well, they might have some infinitesimally small role to play. but let us simply consider the numbers, the amount of money it requires to develop these lasers, vs the value they will have in iraq. vs, say, the money required to train 10,000 arab translators. and the effect they would have on the ground.

  64. Shoot artillery down by flyingfsck · · Score: 1

    "...to shoot missiles and artillery down."
    Well, I guess that once the enemy is throwing their artillery at you, it either means that the gun is broken or that they are seriously out of ammo, in which case, all you got to do is duck, no need for lasers... ;)

    --
    Excuse me, but please get off my Pennisetum Clandestinum, eh!
  65. Mirrors by petraska · · Score: 1

    We just need to develop rockets and artillery that come with mirrors...

  66. -1 Funny?? WTF? by Anonymous Coward · · Score: 0

    How the hell is this -1, Funny? I know, I know...I'M NEW HERE! BITE ME!

    1. Re:-1 Funny?? WTF? by tv_dinners · · Score: 1

      Well, if starting out at +1:

      a -1 troll,
      a -1 flamebait,
      along with a +1 funny
      results in a zero funny.

      You need another Funny, dude.

  67. used for assissinations? by bentoboy · · Score: 1

    I dunno much about lasers but it seems logical to assume that if our govt has this mounted on aircract (http://www.theregister.co.uk/2007/06/20/raygun_ju mbo_wants_pork/), then they probably have plans to mount this on attack helos or a sattelite (provided it has enough power) and use it for covert operations. Could you imagine taking out key insurgents with this type of weapon? All you would need is line-of-sight...Scary...

    1. Re:used for assissinations? by dave420 · · Score: 1

      You'd also need to know where the key insurgents are, which is the biggest problem. And if they're in caves, or hidden, or in disguise, or pretty much anything that doesn't have them walking around in neon pink safari suits with massive foam cowboy hats with "I'm worth a $20m reward" written on them, then this weapon is useless for that purpose.

    2. Re:used for assissinations? by bentoboy · · Score: 1

      I think they already do this with Predator drones loaded w/ hellfire missiles; I've seen footage on liveleak. So, if they have a truck-mounted laser nearby and a drone that can relay the laser to the target....poof! and nobody will know where the strike came from (unlike a missile).

  68. This is cool? by Savage-Rabbit · · Score: 2, Funny

    After the war, torture, Gitmo, NSA's unwarranted wiretapping and all the other crap that has made me ashamed to be an American, I'm glad that we can even for one brief moment have something cool like this. This is cool? The thing wont even fit on a sharks head... unless the US Army has managed to clone a Megalodon from DNA salvaged from a fossilized tooth or some such artifact in which case they have really pissed off the Navy. The Army should have gone for cloning T-Rexes. Now imagine that, a whole regiment of T-Rexes with lasers on their heads, that would convince those Iraqi insurgents to behave in no time flat. It just goes to show what a mess the Pentagon is still in even though Rumsfeld is long gone.
    --
    Only to idiots, are orders laws.
    -- Henning von Tresckow
    1. Re:This is cool? by lessermilton · · Score: 1

      Awww heck, why not just use pokemon?

      --
      I wish I had a witty .sig
  69. what about mirrors in lasers by Anonymous Coward · · Score: 0

    wouldnt the mirror in the laser get damaged if it absorbed ~20%

    im pretty sure when i took 3rd yr optics and we made lasers (out of all the bits..) in the lab we used front silvered mirrors and i think they were over 99% reflective. i think more like >99.9%

    http://www.rp-photonics.com/dielectric_mirrors.htm l
    states laser mirrors can reflect over 99.9%

    further it mentions 'supermirrors' with 99.9999%

    (maby solid state ones might have been but they require a whole different set of tech) lasers werent possible until engineering of mirrors reached this level, although i believe einsteins paper on light where he discussed the three mechanisms of interaction between light and matter was a crucial idea which leads to the laser. so they were theoretically predicted decades before the mirrors were available.

    of course they wouldnt last long outside of an extremely clean environment as they are front mirrored. although it might be possible to coat them with something.

  70. way to go america by Anonymous Coward · · Score: 0

    wooo! more guns! just what you guys need. you just keep worrying about those terrorists, fear is good for your government!

  71. a flaw in your plan... by tjstork · · Score: 2, Interesting

    If the chemicals needed to shoot down your mortars are significantly lighter than the mortars you fire, advantage goes to the guy with the laser. See, war at this scale is all about who can transport the most stuff to the front first. If you have to bring a truckload of mortars to take out one laser truck, all those things that the laser truck "protects" are going to get you.

    As it is, this is a great weapon that can be used to suppress insurgencies. Insurgents have the element of surprise, but they generally have shitty transport capabilities and have to haul things up for an attack up very slowly. Like, a guy smuggles in a rocket launcher on a donkey. If you take away the likelihood of success of an occasional rocket attack, you've just defeated, militarily, a huge portion of insurgent strategy.

    This makes it far, far easier to impose democracy on new nations, and increases the likelihood that future Iraqs can succeed and much more easily. If we can get something to detect IEDs, we would be golden.

    --
    This is my sig.
    1. Re:a flaw in your plan... by quanticle · · Score: 2, Interesting

      Insurgents have the element of surprise, but they generally have shitty transport capabilities and have to haul things up for an attack up very slowly.

      Well, it depends on what the insurgents are hauling. Sure, for heavy weapons (like artillery and armor), insurgent transport capabilities are pretty crappy. But for small arms and explosives, insurgent transport networks, combined with good caching strategies (like the tunnel-depots in Vietnam) can provide a very robust and reliable supply chain.

      Given that most US casualties these days come from IEDs and small arms (e.g. snipers), one has to wonder how useful this will be in an insurgency. Sure the insurgents do use mortars. However, insurgent mortars generally aren't very accurate and can only really target fixed positions (like US bases), which are hardened against such attack anyway. The real damage from mortar attacks comes from attacks against civilian targets, which fosters sectarian violence and worsens civil strife.

      --
      We all know what to do, but we don't know how to get re-elected once we have done it
    2. Re:a flaw in your plan... by gevil · · Score: 1

      Big Sale: Nutritious Liquid Nitrogen Cooled Frozen Mortars!

    3. Re:a flaw in your plan... by lessermilton · · Score: 1

      If we can get something to detect IEDs, we would be golden. Rats! Foiled again!
      --
      I wish I had a witty .sig
    4. Re:a flaw in your plan... by Anonymous Coward · · Score: 0

      I had a friend who served a year near Ramedi, and he talked about how they heard mortars hitting every day but only one got close enough to camp for anyone to do anything but go about business as usual, and even then it was a passing couple minutes of interest.

    5. Re:a flaw in your plan... by XSforMe · · Score: 1

      "if you have to bring a truckload of mortars to take out one laser truck"

      Mind you, its a twenty ton laser truck. This thing is just way to heavy to see front line action. According to the article the main application of it would be to protect entrenched fortresses against mortar attacks.

      Still, if it ever gets to see front line action, my money would still be on a twenty tons worth of mortar shells, rather than on this beast.

      --
      My other OS is the MCP!
  72. Who are you to talk? by Anonymous Coward · · Score: 5, Insightful

    > If your ashamed to be an American, then America is ashamed to have shed blood for your freedom...nuff said.

    Well, I personally don't think Americans fought and died so that we could torture people, or that you speak for the whole country. But that's just me.

    And don't give me any flag waving to say that these kinds of gross national failures happen elsewhere or are somehow acceptable. I flew what was probably the biggest damn flag in the state for a good long time.

    I don't feel like flying it any more because of all the "patriots" who think that saying "This is the best damn country in the world!" is something you use to excuse problems instead of a reason to acknowledge, fix and rise above them! Dammit, you don't fix things by stuffing your head up your ass! The only way you can NOT feel shame is if you have no damn pride in your country to begin with!

    1. Re:Who are you to talk? by lessermilton · · Score: 1

      all the "patriots" who think that saying "This is the best damn country in the world!" is something you use to excuse problems instead of a reason to acknowledge, fix and rise above them! That's why I tell people that it's a shame that the US is the best country in the world. I truly believe we are, but we are so completely screwed up that I wish we were last place. Kinda says something about the rest of the world (sorry all you other country-folk. Some countries are great and if you grew up there you probably like it just fine... but sadly you have problems that make me look at the US and think... "Well, maybe one more year...")
      --
      I wish I had a witty .sig
  73. then my only question is by commodoresloat · · Score: 1

    How do you talk the enemy into only shooting rounds off where you have your trucks waiting? It seems if you can convince them to do that, you might be able to convince them to stop shooting at you.

    1. Re:then my only question is by totally+bogus+dude · · Score: 1

      Are you serious? Defences are put in locations where the enemy is likely to attack: near high-value targets, or highly vulnerable targets. In a worse case scenario (such as vs insurgents), defences can be established in a reactionary manner in order to discourage attacks against popular targets. If the attackers know of the defences, they may very well choose to attack somewhere else; but that's half the point of having defences. It gives you a certain amount of strategic control over the battlefield, by denying your enemy the ability to strike at key locations of your own choosing.

    2. Re:then my only question is by icebrain · · Score: 1

      Well, put the trucks around the things he'll want to attack (which are generally also the things you want to protect). Examples would include airbases, camps, ammo dumps, ports, bases, motor pools, etc.

      The goal isn't "let's blow up every mortar he shoots for the sake of blowing it up;" rather, it's "let's keep whatever he fires from hitting important/valuable stuff, like people and expensive equipment."

      --
      The meek may inherit the earth, but the strong shall take the stars.
  74. What no Optimus Prime reference...on Slashdot by b0101101001010000 · · Score: 1

    I'm so ashamed.

  75. Oh please, all this hi tech stuff is useless... by Anonymous Coward · · Score: 0

    ...against a guerilla army. Just look at how we manage our great miltary toys. To take out a tree, the US not only fires a $30K missle, it has to use up jet fuel, set up 1000s of troops to find the tree, develop a delivery infrastructure that costs millions, etc. All to take out a tree.

    Meanwhile the world's greatest army is getting it's ass kicked by minimally trained peasants using ratty AK-47s and scavenged explosives. No fancy training, no AWACs, no hi-tech jets, no body armor, no digital radars, etc. A gun, a grenade, and a burro. It probably costs them $100 to take out one of our vehicles, even less for a soldier. And us? Million$ to destroy one insurgent, and then million$ more to rebuild the damage. This war has been one really piss poor return on investment. I wonder what the monetary breakdown has been so far on how much on average it's cost to kill one insurgent.

    Maybe we should start taking bids on miltary actions now and contract stuff out. It would be cheaper.

  76. Chinese will love this... by davinc · · Score: 1

    I would bitch about my tax money going toward this, but really it's not my money paying for it. There has to be some irony to countries like China buying our securities and having them fund crap like this to be used against them at some later date.

    Ron Paul needed stat.

  77. How about something more necessary... by Assassin+bug · · Score: 1

    Like a laser that can be mounted on a vehicle and detect and destroy improvised roadside bombs? Seems like that is something that we could really use.

    1. Re:How about something more necessary... by Anonymous Coward · · Score: 0

      I believe the army already has something like this, using big IR lasers to blow undetonated ammunition up in test zones.
      I don't see it being deployed any time sooner than a larger/more expensive model made for anti-missile purposes.

  78. Not to be a party-pooper... by blind+biker · · Score: 1

    but I'd like to understand how are such weapons going to overcome the problem of a reflective surface on the shell? And I don't even mean a silver-based mirror, just simple chrome coating. That would reflect over 99% of the incoming energy. The fact that a laser beam of almost 100% the original strength would hit random targets on the ground is an added bonus. And there are such reflective compounds that would reflect the ray right back at the "sender". Sure, those would reflect less than 99% or the energy, but if a $5 shell can damage a $5.000.000 weapon system, it's well worth the shell being destroyed in the process.

    I'm thinking aloud here, guys, cut me some slack, show me how/why am I wrong, if I am.

    --
    "The agriculture ministry is not in charge of Gundam" - Japanese ministry official.
    1. Re:Not to be a party-pooper... by hidave · · Score: 1

      Chrome plating is far from simple and the maximum reflectivity that can be achieved is about 65%.

      --
      Synchronizing stop lights across the US = one less nuclear power plant
    2. Re:Not to be a party-pooper... by BoothbyTCD · · Score: 2, Informative

      If you know of a 99% reflective material, patent it now and make lots of money. In the real world however, even precision mirrors top out at 80% or so. That means the other 20% of incoming energy is heating the incoming shell (assuming every shell is polished in a lab before being fired out of perfectly smooth barrels).

      --
      snig
    3. Re:Not to be a party-pooper... by gatkinso · · Score: 1

      Incorrect. The shell is scortched and is mechanically scored (i.e. scratched) when leaving the tube. Even if it was as reflective as you say (it isn't) when it was loaded, it certainly isn't when it is fired.

      This argument was posited as a countermeasure against ABL. It is not viable for many reasons.

      --
      I am very small, utmostly microscopic.
    4. Re:Not to be a party-pooper... by blind+biker · · Score: 1

      In the real world however, even precision mirrors top out at 80% or so.

      I think this is very incorrect, in this context. Silver-coated glass mirrors (that is, the normal household mirrors) have a reflectivity of about 98 % at 700 nm, and it increases even further with lower wavelengths. And this one was an infrared laser.

      For example check this paper for info on silver's reflectivity.

      --
      "The agriculture ministry is not in charge of Gundam" - Japanese ministry official.
  79. So where do you plug them in? by gevantry · · Score: 2, Interesting

    Oh. They'll run off batteries. I wonder what the power requirements will be, how many shots per charge, and recharge time?

    Actually, this could be a boon for developing better batteries, the kind that can be used for electric cars. And, lest we forget, practical hydrogen fuel cells that can keep those batteries charged if not produce enough power to eliminate the need for batteries in the first place.

    The possibilities for spin-off tech may be more interesting than the laser cannons or rail guns.

    1. Re:So where do you plug them in? by Anonymous Coward · · Score: 0

      I wouldn't bet on this boosting battery performance. If they use the same technology as the the ABL http://en.wikipedia.org/wiki/Airborne_Laser the laser will probably be fueled by chemicals instead of electricity.

  80. Any smaller and we are at risk by Rsriram · · Score: 1

    Imagine the laser gets smaller and becomes shoulder held. If the people on the otherside get one of these cuties you can kiss the aviation sector goodbye. Better start selling your stocks in aviation and aviation insurance.

    --
    O this learning! What a thing it is - William Shakespeare
    1. Re:Any smaller and we are at risk by Skrynkelberg · · Score: 1

      It will be a long time before battery packs small enough to carry are powerful enough to power a laser capable of doing more than damage people's eyesight.

    2. Re:Any smaller and we are at risk by gatkinso · · Score: 1

      I agree. However conceptualize.... ....one time use capacitors that are supercharged with energy well before firing. Loaded like bullets. Each one discharges for about 1/20th of a second, at 10000 yards carries the equivalent energy of a 37mm A/A round. Each round also packs it own optics. So once it discharges and trashes the optics new eyeballs are ready for the next shot. Each one say the size of a magnum shotgun shell.

      A directed energy weapon that spits out used capacitors like an automatic weapon ejects used shell casings.

      I just pulled this out of my ass. But it sounds cool, and seems almost plausible.

      --
      I am very small, utmostly microscopic.
  81. prior art ... by freaker_TuC · · Score: 1

    how sixties...

    --
    --- I am known for the ones who want to find me on the net. Is that a privacy risk or a privilege? One might wonder..
  82. Flamebait, WTF? by Mr.+Shotgun · · Score: 1

    How is the parent post Flamebait? The post was not insulting or bating in any way and expressed a valid point. According to the CDC, Drowning is the second leading cause of death for children ages 1-14, with Motor vehicle accidents as the first. Unintentional firearms do not make the top ten list till the 10-14 age group, and even then are only at 9, behind suffocation.

    Further more, the parent post does make a good suggestion, having the NRA teach gun safety would be a great step to reducing accidental and purposeful firearms injuries and deaths. Too many kids nowadays see guns as either something to be feared or else "toys" for adults. They should be taught that guns are nothing to fear but that they are definitely not toys. They are a tools and like all tools, improper care when handling them can cause people to get hurt or even killed. Of course there are a few adults who could learn that lesson as well.

    --
    Of all tyrannies, a tyranny sincerely exercised for the (supposed) good of its victims may be the most oppressive
  83. Also known as by wiredog · · Score: 1

    The hemitt.

  84. Just have to say... by bjk002 · · Score: 1

    You're already Mod'd up, but I would give you all 5 of my Mod points. I wish you hadn't posted AC, for you deserve to have such an astute observation tied to your person.

    Regardless, I salute you sir!! Keep up the good fight!

    --
    Opinion:=TMyOpinion.Create(Me);
  85. I see a flaw in the system by master_p · · Score: 1

    No visible lazer beam! come on you scientists, I want my lazer weapons to emit a visible lazer beam! it's so cool!

  86. Munitions supplies by kaleco · · Score: 1
    In the short to medium term, insurgents will not be able to procure, much less manufacture, reflective munitions. Creating a chrome mortar while preserving its aerodynamics and explosive effectiveness would require more than end-user modification to existing products.

    Another poster said that destroying the laser would be as simple as using countermeasures and calculating its location by following the beam. This may be true, but it would add a tactical element to attacking a coalition base- far from the fire-and-run-away method employed today. Since the laser is truck mounted, I wonder if it can move while firing.

    --
    Prosperity is only an instrument to be used, not a deity to be worshipped. Calvin Coolidge
  87. Re:How do clouds of popcorn change this? by White+Yeti · · Score: 1

    The satellite system has excellent targetting capability.

  88. Godzilla must be coming by Anonymous Coward · · Score: 0

    I mean the Japanese have used these against Godzilla since what, the sixties? I think it was created to fight Mothra first, though.

  89. Daleks! Daleks! by b0s0z0ku · · Score: 1
    War has become far too deadly for fragile wetware, so now that the U.S. is fielding squadrons of drone aircraft, isn't it time to develop Wii-Remote Controlled T2000 combots?


    What about grotesquely mutated humans in multi-nippled metal casings with grating robotic voices?


    We o-bey! We will ex-ter-min-ate!


    -b.

  90. Gas shells... by b0s0z0ku · · Score: 1
    Would this be an incentive for the enemy to produce shells filled with something sufficiently nasty (e.g. sarin?) so that hitting the shell in flight is bound to still do damage? Fire the shells from the other side of hills or something so the laser can't destroy them till they're over the laser position.

    -b.

    1. Re:Gas shells... by jjohnson · · Score: 1

      The shell would have to be exploded by the laser within a couple hundred yards of the laser to do any damage to anyone; even then it would only be suboptimally effective. If the shell is still a kilometer up, the gas would disperse in the atmosphere and cause minimal problems at worst, none if everyone is in MOPS gear.

      --
      Anyone who loves or hates any language, platform, or manufacturer, doesn't know what they're talking about.
    2. Re:Gas shells... by gatkinso · · Score: 1

      Insurgents try this tactic in Balad (sans gas agents) - firing mortars and rockets from behind terrain and buildings.

      Doesn't help - the CIWS (when it is actually turned on) intercepts them regardless. A parabola is a parabola. As soon as it clears the terrain the shell is vulnerable.

      All this tactic does is make their indirect fire less accurate. Not that we mind this.

      --
      I am very small, utmostly microscopic.
  91. Excuse me by WindBourne · · Score: 1

    But exactly what freedom is being shed for at the moment? Heck, even 'nam had more real reasons for backing it (supporting France who has been a major ally). WRT Iraq, GWB had NONE to invade and occupy. The UN had been allowed in and saw that there was no WMD. If you wish to pull the card about a despot, fine. But why him? There were FAR worse out there. In particular, North Korea. In fact, whenever Bush mentions that this is about putting democracy everywhere, then I have to wonder why the verbal attacks on Iran and Venezueala. Both of them have elected leaders which the UN vetted the election process.

    BTW, as to your freedom crap, I have had relatives in the Civil War, WWI, WWII, Korean, 'Nam, and Iraq I. Those that are living (3) have objected to this war as being a waste of ppl, time, and money. They sole republican has changed to ind. and pushes dems. And believe me, NONE of them think that this is about Freedom or threat to us. NADA, ZIP, ZERO ZILCH. They, like the ppl that you knock, join many other patriotic Americans in thinking that this was an atrocity that is being committed by a bunch of chicken hawks, joining the ranks of many Ex-Generals and other officers.

    --
    I prefer the "u" in honour as it seems to be missing these days.
    1. Re:Excuse me by DynamicLynk · · Score: 0

      I guess 9/11 wasn't good enough. For god sakes we were attacked on our own land. If we pull our troops and not fight for our country's protection, don't think for a moment they won't pull together and come at us again, but this time it will be much more devastating. Just because WMD was not found doesn't mean they will not send a kid to America and tell him to press a red button, to detonate a dirty-nuke so he will meet his Idol and his many virgins. But exactly what freedom is being shed for at the moment? Heck, even 'nam had more real reasons for backing it (supporting France who has been a major ally). WRT Iraq, GWB had NONE to invade and occupy. The UN had been allowed in and saw that there was no WMD. If you wish to pull the card about a despot, fine. But why him? There were FAR worse out there. In particular, North Korea. In fact, whenever Bush mentions that this is about putting democracy everywhere, then I have to wonder why the verbal attacks on Iran and Venezueala. Both of them have elected leaders which the UN vetted the election process.

      BTW, as to your freedom crap, I have had relatives in the Civil War, WWI, WWII, Korean, 'Nam, and Iraq I. Those that are living (3) have objected to this war as being a waste of ppl, time, and money. They sole republican has changed to ind. and pushes dems. And believe me, NONE of them think that this is about Freedom or threat to us. NADA, ZIP, ZERO ZILCH. They, like the ppl that you knock, join many other patriotic Americans in thinking that this was an atrocity that is being committed by a bunch of chicken hawks, joining the ranks of many Ex-Generals and other officers.

    2. Re:Excuse me by lessermilton · · Score: 1

      But why him? There were FAR worse out there. In particular, North Korea. Because Iraq didn't have any allies, such as how Korea enlisted China

      That's mainly why Korea sucked big time. China is perfectly glad to have another communist (North Korea) country on her border. China is also perfectly glad to send (IIRC) somewhere in the realm of 300,000 troops to push back the UNC.

      That, and all that delicious Texas Tea... Iraq was a plum ripe for the picking!

      Too bad they didn't check for worms...
      --
      I wish I had a witty .sig
  92. MacGyver by CptPicard · · Score: 1

    Wasn't there an episode with a truck-mounted superlaser or something? :)

    --
    I want to play Free Market with a drowning Libertarian.
  93. You misread more than you think. by Anonymous Coward · · Score: 0

    Chery is a Chinese company whose vehicles will be sold shortly by Chrysler.

  94. Iraq was NEVER about 9/11 or Al Qaeda by WindBourne · · Score: 1

    It is now, but only through the idiots in the white house. I did not suggest that we should pull out of Iraq at this time. In fact, I am one of the few ppl that I know that believe that we should allow the surge some time to see if it will work. Personally, I doubt it will. But I believe that gates and Petraus are well above most of the idiots that are/were in the white house (cheney, rove, rumsfeld, etc). One of the issues with AQ is that they thrive where there is a vacuum in established politics. But, W. has done more for AQ in his 7 years. For starters he did not listen to those in the know about the coming 9/11. Nor, did he listen to the CIA when they advised against Iraq. All in all, W. has done more for AQ that ALL of the top AQ has.That is why they are trying to attack us now.

    You were questioning the patriotism of others on this list who you know NOTHING about. I have known a few officers who have been to Iraq and they tell me that we need to pull out. These guys were in the thick of things (trees ), but also had access to other information (the forest). Your questioning other's patriotism is no different than Bush's "you are either with us or against us" crap. Most of those who want us out of Iraq are JUST as patriotic AND just as American as you or I. They simply believe that we have lost the Iraqi war. Considering that many of the top brass believe that now, they are no different.

    --
    I prefer the "u" in honour as it seems to be missing these days.
    1. Re:Iraq was NEVER about 9/11 or Al Qaeda by Glock27 · · Score: 1
      It is now, but only through the idiots in the white house. I did not suggest that we should pull out of Iraq at this time. In fact, I am one of the few ppl that I know that believe that we should allow the surge some time to see if it will work. Personally, I doubt it will. But I believe that gates and Petraus are well above most of the idiots that are/were in the white house (cheney, rove, rumsfeld, etc). One of the issues with AQ is that they thrive where there is a vacuum in established politics. But, W. has done more for AQ in his 7 years. For starters he did not listen to those in the know about the coming 9/11. Nor, did he listen to the CIA when they advised against Iraq. All in all, W. has done more for AQ that ALL of the top AQ has. That is why they are trying to attack us now.

      I disagree with most of your position. I think we had plenty of reason to invade after all the failed UN resolutions, certain knowledge that Saddam had WMD, Saddam's reluctance to let us inspect, repeated violations of the "no fly" zone, and Saddam's refusal to leave the country voluntarily. Was the war executed perfectly? No, but it was still probably better executed than any similar invasion in history.

      You claim GWB has helped AQ...I claim his policies have killed or captured a whole lot of AQ. Sure, they are recruiting - I'm pretty sure their best recruiting tool are translations of all the defeatist articles and speeches we're constantly pounded with over here. Why wouldn't you join AQ when clearly America is a paper tiger with no staying power and no will to win?

      You were questioning the patriotism of others on this list who you know NOTHING about. I have known a few officers who have been to Iraq and they tell me that we need to pull out. These guys were in the thick of things (trees ), but also had access to other information (the forest). Your questioning other's patriotism is no different than Bush's "you are either with us or against us" crap. Most of those who want us out of Iraq are JUST as patriotic AND just as American as you or I. They simply believe that we have lost the Iraqi war. Considering that many of the top brass believe that now, they are no different.

      I'm sure very few of the "top brass" think we've "lost the war". It is possible we'll not prevail, but again I'd attribute many of our problems over there to our apparent lack of resolve over here. At any rate, it should greatly change the equation in Iraq when we bomb Iran into oblivion. It seems to me inevitable before the 11/08 election.

      As to the "patriotism" of the defeatists, well perhaps they're patriots but if so they're also stupid, intoxicated, or confused. That's my only explanation for people who think we're "losing" when we've had less than 3,000 combat deaths in FIVE YEARS OF FIGHTING.

      Fred Thompson '08!

      --
      Galileo: "The Earth revolves around the Sun!"
      Score: -1 100% Flamebait
    2. Re:Iraq was NEVER about 9/11 or Al Qaeda by baboo_jackal · · Score: 1
      It's hard to base an argument about the Iraq war on personal experience (your own, or that of your friends).

      You were questioning the patriotism of others on this list who you know NOTHING about. I have known a few officers who have been to Iraq and they tell me that we need to pull out. These guys were in the thick of things (trees ), but also had access to other information (the forest).
      I'm active duty Army, and I know a lot of my friends who are there now (I'm not there now, of course) who feel otherwise. In my current assignment, I've been privy to a lot of "forest"-type information that suggests we're doing the right thing.

      I'm not asking anyone to accept my vague proclamations as proof of what I assert. I know better than that. I would just like to add my two cents to this argument. Civilians don't get to see the faces and names behind the specific threats. They certainly don't get to hear about the close calls and ongoing operations to prevent acts of state-sponsored (or inspired) terrorism in Europe. In my experience, it's very real, it's current, and what we're doing in Iraq is worth it.

      Your questioning other's patriotism is no different than Bush's "you are either with us or against us" crap. Most of those who want us out of Iraq are JUST as patriotic AND just as American as you or I.
      But most in the military who want us out of Iraq are just fucking tired. There's.... what, maybe a 1 or 2 million of us, who are being rotated in and out of the ME?

      I agree completely with what we're trying to do in the ME. I think our success there is crucial to defending our freedom in the US. But, as a servicemember, I'm freaking tired of it! I don't want to go back anymore! I've had sergeants (yes, more than one!) (with family and kids, both!) who are on their fourth back-to-back(-to-back) rotation there, doing their job with no complaints, because they believe in it.

      I guess my points are as follows:

      1) What we're trying to accomplish in the ME (Iraq and Afghanistan) is, truly, the decisive point of our battle to keep civilized humans safe, and free to go about their lives.
      2) But I wish it were over, because I hate that fucking place, and Afghanistan too (never been, but my buddy there now says it fucking sucks WORSE).

      I guess that's all.
  95. Re:How do clouds of popcorn change this? by dave420 · · Score: 2, Interesting

    That wasn't a satellite. It was a ship in low-earth orbit. They referenced it being launched from a B1. Though an un-manned satellite would make far more sense, I would have thought.

    I watched the film last night, funnily enough :)

  96. oblig. Austin Powers by Anonymous Coward · · Score: 0

    Dr. Evil: You know, I have one simple request. And that is to have sharks with frickin' laser beams attached to their heads! Now evidently my cycloptic colleague informs me that that cannot be done. Ah, would you remind me what I pay you people for, honestly? Throw me a bone here! What do we have?
    Number Two: Sea Bass.
    Dr. Evil: [pause] Right.
    Number Two: They're mutated sea bass.
    Dr. Evil: Are they ill tempered?
    Number Two: Absolutely.
    Dr. Evil: Oh well, that's a start.

  97. Don't need karma... by Anonymous Coward · · Score: 0

    I've been at maxed karma for so long now, I really don't need any more. As for my ideas, I'd rather people didn't know who I am. That way, they evaluate my ideas on their own merits and not because of how they think of me. Not that I'm famous, but I like to think I'd be as recognizable as, say, AKAImBatman on Slashdot if I wrote under my own account more often.

    Anyhow, this is better if it helps people take my ideas as their own. I write to persuade, so "plagiarizing" my thoughts is the very best thing you can do with them, because it means that you agree with me very thoroughly.

  98. What about chaff? by Joce640k · · Score: 1

    What if you fill the air with chaff before you fire the real bombs?

    One air burst which releases 10,000 little pieces of tin foil should keep the laser tracker busy for a while (and only cost a couple of dollars).

    --
    No sig today...
  99. What about big -- very, very big lasers out of ice by Nefarious+Wheel · · Score: 1
    You could be right about the fuel vs. rounds weight. Is the laser liquid or gaseous? Either way there would be a lot of fluid to pump through, solid lasers being mostly a thing of the past if my last reading isn't too obsolescent.

    Here's an idea -- what about orbital lasers made out of ice? You could use solar mirrors & a slight spin to melt and fusion-purify asteroidal ice or planetary ring ice and make some whopper of a giant solid laser with even larger solar mirrors to pump it. A five-kilometer solid laser perhaps? If you made it large enough I bet you could get a lot of useful life out of it before you ran out of thermal mass and went liquid. Would be useful as a power source for interstellar spacecraft; a stationary laser at some appropriate solar orbit of arbitrary size, heating reaction mass for a spacecraft, then using simple photonic reflection when that ran out. Could do a fair approximation of C I'd think, but blimey I'd be in trouble for an idea on how to slow it down.

    --
    Do not mock my vision of impractical footwear
  100. uhh... how come these mirrors are above 80%? by afxgrin · · Score: 1

    You can get mirrors that are manufactured for a specific wavelength that are 99.98% reflective. They use them in lasers, especially Helium Neon lasers, since the gain in the tube is low, without precision mirrors the laser would never work to begin with. And I'm looking at a catalogue here by Edmund Optics, and their gold mirrors are 94-97% reflective for wavelengths 650 nm and above. The 1" gold mirror is $1,239... so yes, I'd like to see a brilliant military planner demand that all missiles and mortars be precision coated with gold. :-) Since any of the laser systems used to shoot down projectiles will likely be operating at infrared wavelengths, probably 1064 nm, since that's typical for a Nd:YAG laser (or for a COIL laser at 1.315 m), making a reflective coating for that wavelength, even if reflects only 80%, could be enough to render a system like this useless if they can't increase the beam power.

    But since most projectiles aren't coated with anything, the cost of trying to counter a laser defense system would be very prohibitive and would only be worthwhile on the most expensive weapons, like ICBMs and cruise missiles.

    I never thought I'd be seeing Prism Tanks so early though, I was expecting these things to come out 10 years from now, not now.

  101. OLD NEWS by Anonymous Coward · · Score: 0

    Don't you brainwashed idiots remember when they tested this on the Shuttle Columbia!