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#71
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On Thu, 18 Sep 2003 13:43:45 +0100, Nick Pedley wrote:
"Paul Austin" wrote in message .. . "Tony Williams" wrote I understand that basic Stryker is right on the size/weight carrying limits of the C-130. Any info on how the Herc will cope with the bigger versions, like the one carrying a 105mm gun? By buying A400Ms? Seriously, the Stryker (idiot spelling) The Stryker Armoured Vehicle is named after two US Medal of Honor recipients (one WW2, one Vietnam), as widely reported at the time. https://www.bctide.army.mil/newpages/medalofhonor.shtml Nowt stupid about that spelling, I think. Though it is confusing that the name is similar to a British armoured vehicle, the Striker. I'd have called it the Piranha, as vthat was it's original name. -- "It's easier to find people online who openly support the KKK than people who openly support the RIAA" -- comment on Wikipedia |
#72
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"phil hunt" wrote in message . .. transmissions still very clear), and the use of FH combined with crypto key makes it darned near impossible for the bad guy to decypher it in any realistic timely manner. Modern crypto is good enough to withstand all cryptanalytic attacks. Thank you Admiral Doenitz... |
#73
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L'acrobat wrote:
"phil hunt" wrote in message . .. transmissions still very clear), and the use of FH combined with crypto key makes it darned near impossible for the bad guy to decypher it in any realistic timely manner. Modern crypto is good enough to withstand all cryptanalytic attacks. Thank you Admiral Doenitz... ------------ He's right. Major breaththrough of all possible barriers, the RSA algorithm. Uncrackable in the lifetime of the serious user, and crack is entirely predictable with improved computing power and can be lengthened to compensate. -Steve -- -Steve Walz ftp://ftp.armory.com/pub/user/rstevew Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!! http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public |
#74
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"Paul Austin" wrote in message . ..
"Kevin Brooks" wrote in message om... "Thomas Schoene" wrote in message k.net... "Kevin Brooks" wrote in message om Think of it as another system using the same concept as current spaced armor and ceramic composites, which also hinge upon diffusing the jet over a larger area, a;beit one with extremely fine tolerances for successful initiation. As I understand it, the system actually self-initiates -- the plasma jet actually bridged the gap and shorts out the capacitor on impact. No timing mechanism required. OK, I can see where that would complete the circuit, though now you are left with a plate capacitor with a hole in one plate, if I am understanding this properly--how well is it going to work a second time? How much power is required? How are other systems to be protected from your own protective capacitance discharge? Sorry, but this does not sound like the most promising of developments against the HEAT round, and I can't see how it would be that effective against a kinetic round, so is this another wonderful research project that sees little opportunity of realistic fielding? It seems far-fetched to me as well although for long rod rounds. I went back and re-read the article and the jet "is virtually instantaneously dispersed by the high temperatures and powerful fields generated by a pulsed power system carried by the vehicle". A Warrior was used as the testbed and it was subjected to multiple attacks with no major damage. I would imagine a significant discharge is required; do we really want that kind of discharge going off around our nifty battle command computer, computerized weapons sight, radios, etc.? Not to mention the effect on the now-ubiquitous Palm Pilot found in many, if not most, platoon leaders shirt pockets...g As far as holes in the capacitor are concerned, an enemy may have difficulty hitting the same spot twice. I would have said "unlikely" except last week's AwWeek mentioned that two JASSMs hit the same spot in rapid succession without benefit of a LASER spot. If the optical tracker used for precision targeting for JASSM can do that, a similar seeker can do that for ATGMs. Which also means "let reactive armor designers beware". Actually, I was thinking more along the line of degraded capacitor performance due to a hole being in one of the two plates, not so much the "in the same spot" issue. Power apparently isn't a problem. The IDR article says that the electrical load is "no more arduous than starting the engine on a cold morning" OK, makes sense. If you're interested, the (brief) description is found in the current IDR (September) on page 55. I stopped getting IDR many years ago; it was good, but it was also rather pricey. I still can't see this being very useful against KE rounds, or for that matter the lower caliber IFV killers like the 20, 25, and 30mm. And how do you bleed off the capacitors if they are not used? That would be one heck of a nasty shock awaiting the troopie who shorts it out with his rifle muzzle or wrench. Brooks |
#75
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"R. Steve Walz" wrote in message ... L'acrobat wrote: "phil hunt" wrote in message . .. transmissions still very clear), and the use of FH combined with crypto key makes it darned near impossible for the bad guy to decypher it in any realistic timely manner. Modern crypto is good enough to withstand all cryptanalytic attacks. Thank you Admiral Doenitz... ------------ He's right. Major breaththrough of all possible barriers, the RSA algorithm. Uncrackable in the lifetime of the serious user, and crack is entirely predictable with improved computing power and can be lengthened to compensate. The fact that you and I think it is unbeatable, doesn't mean it is. "lifetime of the serious user" what ********, you and I have absolutely no idea what sort of tech/processing power will be available 10 years from now, let alone 30. "and crack is entirely predictable with improved computing power" of course it is... Ask the good Admiral how confident he was that his system was secure. Damn near as confident as you are and that worked out so well, didn't it? |
#76
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#77
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"Kevin Brooks" wrote "Paul Austin" wrote "Kevin Brooks" wrote OK, I can see where that would complete the circuit, though now you are left with a plate capacitor with a hole in one plate, if I am understanding this properly--how well is it going to work a second time? How much power is required? How are other systems to be protected from your own protective capacitance discharge? Sorry, but this does not sound like the most promising of developments against the HEAT round, and I can't see how it would be that effective against a kinetic round, so is this another wonderful research project that sees little opportunity of realistic fielding? It seems far-fetched to me as well although for long rod rounds. I went back and re-read the article and the jet "is virtually instantaneously dispersed by the high temperatures and powerful fields generated by a pulsed power system carried by the vehicle". A Warrior was used as the testbed and it was subjected to multiple attacks with no major damage. I would imagine a significant discharge is required; do we really want that kind of discharge going off around our nifty battle command computer, computerized weapons sight, radios, etc.? Not to mention the effect on the now-ubiquitous Palm Pilot found in many, if not most, platoon leaders shirt pockets...g Yes, I don't think anyone has done any EMI compatibility surveys yet. As far as holes in the capacitor are concerned, an enemy may have difficulty hitting the same spot twice. I would have said "unlikely" except last week's AwWeek mentioned that two JASSMs hit the same spot in rapid succession without benefit of a LASER spot. If the optical tracker used for precision targeting for JASSM can do that, a similar seeker can do that for ATGMs. Which also means "let reactive armor designers beware". Actually, I was thinking more along the line of degraded capacitor performance due to a hole being in one of the two plates, not so much the "in the same spot" issue. Since the external "capacitor" isn't where the energy is stored but rather is a set of all-enveloping contacts, I don't think that's a problem. The thing seems to work with a separate energy store like a homopolar generator or internal capacitor bank. Power apparently isn't a problem. The IDR article says that the electrical load is "no more arduous than starting the engine on a cold morning" OK, makes sense. If you're interested, the (brief) description is found in the current IDR (September) on page 55. I stopped getting IDR many years ago; it was good, but it was also rather pricey. Every year when I'm faced with renewal, it's a struggle. I still can't see this being very useful against KE rounds, or for that matter the lower caliber IFV killers like the 20, 25, and 30mm. And how do you bleed off the capacitors if they are not used? That would be one heck of a nasty shock awaiting the troopie who shorts it out with his rifle muzzle or wrench. There are_lots_of problems with this and frankly, I doubt it will ever be fielded. If it were perfected, it would confer immunity to shaped charge attack, leaving KE projectiles to be delt with by other armor. The system does seem to be light though. |
#78
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On Thu, 25 Sep 2003 14:47:07 +1000, L'acrobat wrote:
"lifetime of the serious user" what ********, you and I have absolutely no idea what sort of tech/processing power will be available 10 years from now, Ever heard of Moore's law? I've got a pretty good idea. A typical PC now has a 2 GHz CPU, and about 256 MB RAM. Assume these double every 18 months. 10 years is about 7 doublings so in 2003 we'll see PCs with 250 GHz CPUs and 32 GB of RAM. -- "It's easier to find people online who openly support the KKK than people who openly support the RIAA" -- comment on Wikipedia |
#79
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On 24 Sep 2003 20:00:46 -0700, Kevin Brooks wrote:
I still can't see this being very useful against KE rounds, or for that matter the lower caliber IFV killers like the 20, 25, and 30mm. I think there are a lot of lightweight armour schemes that are more effective against shaped charge warheads than KE rounds. Which implies to me that the best anti-tank weapon is a KE round, in other words the best anti-tank weapon is another tank. Or is it? How about a tank-destoyer armed with a forward-facing large caliber gun, in other words a modernised version of WW2 weapons like the Jagdpanther or ISU-122? For the same weight of vehicle, it could carry a heavier gun than a tank, and probably have a lower profile and be better armoured too. It would be cheaper (no complex turret machinery) and more reliable (less to go wrong). Its main disadvantage would be in the tactical limitations of a gun with a limited traverse. -- "It's easier to find people online who openly support the KKK than people who openly support the RIAA" -- comment on Wikipedia |
#80
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