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Post by thorneel on Mar 19, 2017 22:08:53 GMT
According to http:// www. wolframalpha. com/input/?i=acceleration+0.1+m%2Fs²+for+one+minute with 0.1 m/s² (or about 10 mg) acceleration, you move 180 m away in one minute.
1 light minute is about 18 Gm, or 18 million km (for reference, one astronomical unit, the distance between Earth and Sun, is about 150 million km). As the attacker has to see the ship moving, then the corrected laser has to arrive, those 10 mg acceleration give 180 m distance at half a light-minute, or 90 million km.
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Post by Enderminion on Mar 20, 2017 1:38:34 GMT
guns longer then one Tm are possible, your point is mute when you are between the breach and muzzel of my cannon thorneel
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Post by lawson on Mar 20, 2017 5:21:15 GMT
... a laser is very dodgeable at light seconds of range, nevermind light minutes. I have to take issue with this statement. The speed of light is the fastest speed information can travel, that is to say, you can't detect it before it has arrived. You can't dodge a laser because the only way to detect it is when it hits you. AFTER you are hit, you could move out of the way, but if the laser source adjusts aim you couldn't know until you are hit again. I'll nit-pick this a bit. Space isn't totally empty. The are detectable levels of dust and gas everywhere in the solar-system. ( 5 particles per cubic centimeter or so ) This means that when someone fires a Gigawatt laser across your bow as a warning, your sensor will pick up a line of dust sparkling and evaporating in the laser beam path. Out at light minute ranges, this means lasers aren't a danger unless someone decides burn enough uranium to broil the cubic kilometer of space your ship happens to be in. This is remarkably feasible feat given CoDE reactor and laser tech. An un-modded laser array pumped with about 2TW of electricity would be able to fill a square kilometer with 100KW/m^2. I.e. 10x the solar flux in Mercury's orbit and enough to slow roast civilian and some military ships. Bottom line, don't piss off the laser-broom cartel.
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Post by lieste on Mar 20, 2017 8:36:17 GMT
While you may not be able to dodge an accurately pointed laser, the nature of tracking systems does mean that they have integrator lag, and can be spoofed by irregularly changing accelerations.
Probably not enough to force complete misses, but it may reduce the proportion of time dwelt on target and increase the spot coverage at the expense of intensity.
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Post by bigbombr on Mar 20, 2017 8:47:37 GMT
I have to take issue with this statement. The speed of light is the fastest speed information can travel, that is to say, you can't detect it before it has arrived. You can't dodge a laser because the only way to detect it is when it hits you. AFTER you are hit, you could move out of the way, but if the laser source adjusts aim you couldn't know until you are hit again. I'll nit-pick this a bit. Space isn't totally empty. The are detectable levels of dust and gas everywhere in the solar-system. ( 5 particles per cubic centimeter or so ) This means that when someone fires a Gigawatt laser across your bow as a warning, your sensor will pick up a line of dust sparkling and evaporating in the laser beam path. Out at light minute ranges, this means lasers aren't a danger unless someone decides burn enough uranium to broil the cubic kilometer of space your ship happens to be in. This is remarkably feasible feat given CoDE reactor and laser tech. An un-modded laser array pumped with about 2TW of electricity would be able to fill a square kilometer with 100KW/m^2. I.e. 10x the solar flux in Mercury's orbit and enough to slow roast civilian and some military ships. Bottom line, don't piss off the laser-broom cartel. So at extreme ranges, drag ceases to be a non-issue for kinetics, even in space?
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Post by newageofpower on Mar 20, 2017 14:27:42 GMT
I'll nit-pick this a bit. Space isn't totally empty. The are detectable levels of dust and gas everywhere in the solar-system. ( 5 particles per cubic centimeter or so ) This means that when someone fires a Gigawatt laser across your bow as a warning, your sensor will pick up a line of dust sparkling and evaporating in the laser beam path. Out at light minute ranges, this means lasers aren't a danger unless someone decides burn enough uranium to broil the cubic kilometer of space your ship happens to be in. This is remarkably feasible feat given CoDE reactor and laser tech. An un-modded laser array pumped with about 2TW of electricity would be able to fill a square kilometer with 100KW/m^2. I.e. 10x the solar flux in Mercury's orbit and enough to slow roast civilian and some military ships. Bottom line, don't piss off the laser-broom cartel. So at extreme ranges, drag ceases to be a non-issue for kinetics, even in space? There's no drag in space, otherwise our hypervelocity sandguns would be meaningless. What lawson is proposing is that you would use a 2TW+ array to slow cook an volume of space using a kilometer+ spot size. You could use heat pumping to ensure correct heat rejection when your whole hull and radiators are being heated, so military warships could conceivably operate just fine while being "artillery lased". However, the same "boiling beam" will become a death ray once your warship gets closer, which in CoADE terms means instant death. There have been interesting discussion by the Project RHO/Atomic Rockets crowd about shooting clouds of translucent high-diffraction 'sand' (usually made of something like sapphire or fused quartz) to ensure the death beam doesn't kill your ship.
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Post by bigbombr on Mar 20, 2017 14:43:49 GMT
So at extreme ranges, drag ceases to be a non-issue for kinetics, even in space? There's no drag in space, otherwise our hypervelocity sandguns would be meaningless. What lawson is proposing is that you would use a 2TW+ array to slow cook an volume of space using a kilometer+ spot size. You could use heat pumping to ensure correct heat rejection when your whole hull and radiators are being heated, so military warships could conceivably operate just fine while being "artillery lased". However, the same "boiling beam" will become a death ray once your warship gets closer, which in CoADE terms means instant death. There have been interesting discussion by the Project RHO/Atomic Rockets crowd about shooting clouds of translucent high-diffraction 'sand' (usually made of something like sapphire or fused quartz) to ensure the death beam doesn't kill your ship. The quote mentioned difration due to dust an gas particles. If this has a notable effect on lasers, it probably has one on kinetics too.
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Post by lawson on Mar 20, 2017 15:40:49 GMT
I'll nit-pick this a bit. Space isn't totally empty. The are detectable levels of dust and gas everywhere in the solar-system. ( 5 particles per cubic centimeter or so ) This means that when someone fires a Gigawatt laser across your bow as a warning, your sensor will pick up a line of dust sparkling and evaporating in the laser beam path. Out at light minute ranges, this means lasers aren't a danger unless someone decides burn enough uranium to broil the cubic kilometer of space your ship happens to be in. This is remarkably feasible feat given CoDE reactor and laser tech. An un-modded laser array pumped with about 2TW of electricity would be able to fill a square kilometer with 100KW/m^2. I.e. 10x the solar flux in Mercury's orbit and enough to slow roast civilian and some military ships. Bottom line, don't piss off the laser-broom cartel. So at extreme ranges, drag ceases to be a non-issue for kinetics, even in space? No, the density is still too low to slow kinetics much as most of the particles in space are plasma atoms. It IS enough to scatter a few nano-watts of a doom laser your way so you know when someone is telling you to back off. Or to dodge a tightly focused doom laser that's firing from several light-minutes away. My comments on "artillery laser" use are just pointing out how versatile combat lasers are. While CoDE only uses them for direct damage, they'd be very useful to overheat and blind any ship that didn't respond to police action, etc.
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Post by deltav on Mar 21, 2017 7:00:08 GMT
I had no idea where to place this, but when I saw it I almost jumped in the air. Tell me this doesn't look JUST like...
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Post by argonbalt on Mar 21, 2017 15:19:45 GMT
I had no idea where to place this, but when I saw it I almost jumped in the air. Tell me this doesn't look JUST like... All tracers from any sufficiently high ROF gun will look like what we have in COADE,if you look far enough you could probably find ww2 footage that looked similar.
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Post by apophys on May 11, 2017 13:26:29 GMT
If you're constantly moving, you're pissing away your fuel very quickly. Apophys's Gladiator design showed that at 1000 km even 3 ug of thrust was enough to dodge multihundred km/s kinetics. You don't need to turn on the main drive torch for laser dodge purposes at light minutesYou're remembering my numbers incorrectly, by many orders of magnitude. The dodging thrusters gave it ~960 mg 0 of acceleration (not microgees). It was reliably dodging projectiles ~100 km/s. With enough propellant for 6 minutes of constant dodging, on a full tank. The MPD for orbital maneuvers gave it ~4 mg 0 acceleration (still not microgees). This certainly could not dodge.
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Post by newageofpower on May 11, 2017 13:31:28 GMT
Apophys's Gladiator design showed that at 1000 km even 3 ug of thrust was enough to dodge multihundred km/s kinetics. You don't need to turn on the main drive torch for laser dodge purposes at light minutesYou're remembering my numbers incorrectly, by many orders of magnitude. The dodging thrusters gave it ~960 mg 0 of acceleration (not microgees). It was reliably dodging projectiles ~100 km/s. With enough propellant for 6 minutes of constant dodging, on a full tank. The MPD for orbital maneuvers gave it ~4 mg 0 acceleration (still not microgees). This certainly could not dodge. Bit of a necro, old friend. We concluded dodging is futile when you can boil entire cubic kilometers of space with multiterawatt beams. Still overjoyed that your still around.
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Post by apophys on May 11, 2017 13:55:19 GMT
Re: necro I knew it's old, but I had to fix that error for the posterity of people reading through ancient threads. Which I know happens, since my old posts have been slowly gathering likes over the 2 months I've been away. Still overjoyed that your still around. I took a break due to the maddening optics damage bug. Glad that got fixed.
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Post by David367th on May 11, 2017 14:22:54 GMT
Re: necro I knew it's old, but I had to fix that error for the posterity of people reading through ancient threads. Which I know happens, since my old posts have been slowly gathering likes over the 2 months I've been away. Still overjoyed that your still around. I took a break due to the maddening optics damage bug. Glad that got fixed. Well glad your back, you'll be getting that god tag in no time
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Post by 𝕭𝖔𝖔𝖒𝖈𝖍𝖆𝖈𝖑𝖊 on Jun 13, 2017 1:35:05 GMT
The best Q-ships are the ones from other factions (or "independents") who don't know they are Q-ships. "This is a... refined boron container. Yeah. Just pure, harmless boron. Not a concealed missile at all, and especially not with a mechanism to tear the hull and launch it once you are at destination." what is a Q-ship?
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