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"peter" writes:
I think almost everyone is missing the point about assymetric warfare. All the comments are based on US/NATO type equipment standards, and military objectives. The whole point of assymetric warfare is that you don't follow the standards, you go for what you can achieve where you can achieve it with what you can get. 9/11 was a classic example. If some one out there is planning on using cruise missiles for example, he wont build them to Tomahawk standards, he wont select tomahawk like targets and so on. Assymetric warfare is about doing the unexpected, with the unexpected by surprise, that negates the defences and allows success. If you haven't got the budget of the US, you dont try to emulate them and expect to win, you have to think out of 'our' box. Aren't you forgetting something? In addition to Thinking Outside The Box, don't they have to implement a Paradigm Shift or something like that? You're about ten years too late to pat yourself on the back for dispensing privileged knowledge to the masses on this one. Everyone here gets the point about Asymmetric Warfare. We understand it, really. We are trying to explain to you that Asymmetric Warfare is not a Magic Word that wipes away some very hard problems in weapons technology or military science. There are *reasons* the US/NATO do things the way they do, and if it is't the most efficient way possible it does at least allow the concentration of enormous resources on those Very Hard problems with the result that the US/NATO and company have some Very Impressive capabilities. Invoking the Asymmetric Warfare buzzword does nothing to counter those capabilities. It isn't clear that they even *can* be countered, save in kind, but if it is possible it will involve a whole slew of very hard problems in its own right, and that the amateurish solutions posited here are not going to cut it. -- *John Schilling * "Anything worth doing, * *Member:AIAA,NRA,ACLU,SAS,LP * is worth doing for money" * *Chief Scientist & General Partner * -13th Rule of Acquisition * *White Elephant Research, LLC * "There is no substitute * * for success" * *661-951-9107 or 661-275-6795 * -58th Rule of Acquisition * |
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John Schilling wrote:
[...] Invoking the Asymmetric Warfare buzzword does nothing to counter those capabilities. It isn't clear that they even *can* be countered, save in kind, but if it is possible it will involve a whole slew of very hard problems in its own right, and that the amateurish solutions posited here are not going to cut it. Pushback. While you are generally correct... I think that some of the enthusiasts here are not paying enough attention either to details or to the big picture... I believe that there are some unconventional and asymmetrical things which could be done which would severely hamper western style warfare. One of the things which could be done looks a lot like one of the things under discussion here. There are many others, and the overall strategy of defense by and only by massive cheap cruise missiles is a grand scale loser, but as part of doing a lot of other things it might well be a viable strategy component. -george william herbert |
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William Baird wrote:
First couple generations I'd expect the lasers to be in dedicated AA platforms. After that, I wouldn't be surprised at all if they proliferated into the slot of the AA .50 cal on tanks. assuming they still have MBTs around then, of course. My prediction is that laser weapons will really take off when a practical, high efficiency, high repetition rate short pulsed (nanosecond or less) laser with a reasonable energy per pulse (say about a joule) is available. By high efficiency, I mean comparable to today's chemical and solid state CW lasers, around 10% to 30% or better, not the piddly 1% efficiency we get with solid state lasers operating with flashlamps. Why pulsed lasers? Short pulses cause damage to the target through mechanical means (induced by the violent expansion of the solid density plasma created by the pulse) rather than thermal. This is two to three orders of magnitude more efficient at causing structural damage than direct vaporization. The high repetition rate specified (several kilohertz or faster) will allow you to blast holes though things quickly compared to the relatively slow burning of CW lasers. We still have a way to go to get lasers of this performance, however (or if we don't, no one is talking about it). At the rate at which laser technology is advancing, though, it will probably not be too long before the military has these toys to play with. Luke |
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In article , LukeCampbell
wrote: Why pulsed lasers? Short pulses cause damage to the target through mechanical means (induced by the violent expansion of the solid density plasma created by the pulse) rather than thermal. This is two to three orders of magnitude more efficient at causing structural damage than direct vaporization. The high repetition rate specified (several kilohertz or faster) will allow you to blast holes though things quickly compared to the relatively slow burning of CW lasers. You also have some problems with ionization of the air in some conditions, degrading the beam. -- cirby at cfl.rr.com Remember: Objects in rearview mirror may be hallucinations. Slam on brakes accordingly. |
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Chad Irby wrote:
You also have some problems with ionization of the air in some conditions, degrading the beam. For visible or near IR, this is not so much of a problem as with mid IR (or UV, for that matter). There is an ionization phenomena that can actually help propagate the laser beam in some conditions. Very intense light in air can lead to self focusing, and if there was nothing to stop it, the laser would catastrophically self focus down to a point, resulting in strong ionization and the total absorption of the beam. It turns out however that before this occurs, the beam will cause weak ionization of the air, forming a diverging lense and expanding the beam again. The beam still has enough power to self focus in normal air, though, so you go through a sort of leap-frog effect of focus, diverge, focus, diverge, etc. This overcomes diffractive spreading of the beam, and some researchers have managed to propagate millijoule, femptosecond pulses of laser light for several kilometers through the atmosphere using this method. It is not clear if this would be a good option for weapons, but it might turn out to be a very effective means of delivering pulsed laser energy to targets within a few kilometers. Luke |
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LukeCampbell wrote in message
My prediction is that laser weapons will really take off when a practical, high efficiency, high repetition rate short pulsed (nanosecond or less) laser with a reasonable energy per pulse (say about a joule) is available. FWIW, the LLNL solid state laser is a pulsed one. The flash lamps are supposed to be followed on with LEDs as well. Ah, here we go: "The project scientists are also investigating several diode cooling and packaging techniques for optical pumping using laser diodes. A 10-bar prototype monolithic diode array is operational and delivers 300 W at 940 nm. When complete, the HELSTF laser will deliver 100-kW-to-MW output power under burst mode for the duration of several seconds." We still have a way to go to get lasers of this performance, however (or if we don't, no one is talking about it). At the rate at which laser technology is advancing, though, it will probably not be too long before the military has these toys to play with. The technologies are sufficiently advanced enough that the Blue Beanies, ahem, USAF are talking about putting a SS-HEL in the back of Lockheed's Air Force JSF version. My bet is that within ten years we'll see each branch of the military with one sort of laser or another as an offensive weapon. Will Luke -- William P Baird Do you know why the road less traveled by Speaking for me has so few sightseers? Normally, there Home: anzha@hotmail is something big, mean, with very sharp Work: wbaird@nersc teeth - and quite the appetite! - waiting Add .com/.gov somewhere along its dark and twisty bends. |
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William Baird wrote:
LukeCampbell wrote in message My prediction is that laser weapons will really take off when a practical, high efficiency, high repetition rate short pulsed (nanosecond or less) laser with a reasonable energy per pulse (say about a joule) is available. FWIW, the LLNL solid state laser is a pulsed one. The flash lamps are supposed to be followed on with LEDs as well. Ah, here we go: "The project scientists are also investigating several diode cooling and packaging techniques for optical pumping using laser diodes. A 10-bar prototype monolithic diode array is operational and delivers 300 W at 940 nm. When complete, the HELSTF laser will deliver 100-kW-to-MW output power under burst mode for the duration of several seconds." Oh. My reading was that it could operate at full power (about 100 kW CW) for several seconds, and then had to be shut off to cool. Since I'm not actually working on the beasty, though, I can't say if my reading is correct or not. We still have a way to go to get lasers of this performance, however (or if we don't, no one is talking about it). At the rate at which laser technology is advancing, though, it will probably not be too long before the military has these toys to play with. The technologies are sufficiently advanced enough that the Blue Beanies, ahem, USAF are talking about putting a SS-HEL in the back of Lockheed's Air Force JSF version. My bet is that within ten years we'll see each branch of the military with one sort of laser or another as an offensive weapon. Sounds about right. I would have guessed 10 to 20, myself, but I am usually a bit conservative. Luke |
#10
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![]() "John Schilling" wrote in message ... (George William Herbert) writes: John Schilling wrote: Likewise, if your idea is that it doesn't matter how easy an individual missile is to find and kill because you are going to saturate US/NATO style air defenses with numbers, you don't match it against the present standard of an F-15 with four each AMRAAMs and Sidewinders but against an F-22 packed to the limit with air-to-air Stingers; fourty-five stowed kills at 0.8 Pk per shot, if my math is correct. I was under the impression (mistaken?) that the F-22 can only carry 4 air-to-air missiles, if it carries more it loses what stealth it had and you might as well send in F-15s?? Damo - who would much rather read a discussion about cheap(ish) cruise missiles then trying to defeat the US on the battlefield. This is a science based group, not fantasy. -- *John Schilling * "Anything worth doing, * *Member:AIAA,NRA,ACLU,SAS,LP * is worth doing for money" * *Chief Scientist & General Partner * -13th Rule of Acquisition * *White Elephant Research, LLC * "There is no substitute * * for success" * *661-951-9107 or 661-275-6795 * -58th Rule of Acquisition * |
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