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Post by Kerr on Aug 30, 2017 15:17:28 GMT
Type: Missile Propulsion: NSWR 20% UTB Isp: 6,728 Acceleration: 8-32 G Delta-v: 91.5km/s Wet mass: 40t Dry mass: 10t Engine mass: 5t The engine needs to have the twice the Thrust/weight ratio of the original design. But given the fact that you can use graphene which has twice the boiling point of most steel and titanium alloys plus dozens to hundred times the mechanical strenght this might be do-able. ironclad6
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Post by ironclad6 on Aug 30, 2017 15:23:23 GMT
Either Laser-Thermal or NTR. Laser-thermal would be the cheaper option. NTR's still require some fissiles. The advantage of laser thermal is that the expensive and heavy part (reactor, laser and radiators) stay on your capital ship, which would probably have them anyway. That way, you can use your lasers to first boost missiles with a laser thermal first stage to several dozen km/s, have the missiles/submunitions use chemical thrusters for terminal course correction once too far from the laser to use the laser thermal drive, and your capital ships can use the lasers for point defense. That's probably a good scheme for anti-capital missiles. I'll probably use something like it for the Adamites ADGA missiles. One of the big literary challenges of a work like this is coming up with two viable ways of doing basically the same thing that closely reflect the respective factions technical and cultural pre-occupations. The Systems Commonwealth is pre-occupied with it's history of carelessness and despoliation and as such is willing to expend substantial effort on clean, precise, careful approaches. They want to be able to hit a specific guy, from orbit without killing the people on either side of him. They don't often succeed but the desire and preoccupation is there. The Adamites on the other hand pack 2.5 megaton nukes for anti-capital combat and use heavy mass drivers to hit ground targets. One of the reasons I can't use laser thermal rockets for the Whisker drone line is because they're expected to go to places without line of sight to a capital ship and on occasion to fly trans-atmospherically to deliver precision guided munitions to surface targets.
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Post by ironclad6 on Aug 30, 2017 15:32:40 GMT
Only for terminal homing where I have hundreds of super agile KSOWS maneouvering so as to make lasing them difficult. Sounds familiar, so what is the propulsion of the carrier drone now? And maybe you should use Flourine-Lithium Hydride rockets. Very flexible, compact and it has an even better isp than LOX-LH2. Is that a mod? I don't think I've seen that one.
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Post by Kerr on Aug 30, 2017 15:36:20 GMT
Sounds familiar, so what is the propulsion of the carrier drone now? And maybe you should use Flourine-Lithium Hydride rockets. Very flexible, compact and it has an even better isp than LOX-LH2. Is that a mod? I don't think I've seen that one. Its rather old. Look for lithium fuels at rocket witch thread. Also lser thermal have some more flaws for your setting. I did some math.
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Post by ironclad6 on Aug 30, 2017 16:01:05 GMT
Is that a mod? I don't think I've seen that one. Its rather old. Look for lithium fuels at rocket witch thread. Also lser thermal have some more flaws for your setting. I did some math. Details on said flaws? Also, if you have a notion on how to do the field strength equations for magnetic confinement nozzles I'd appreciate the input. I'm really looking to work out how much power I'd need to allow for. It also just occurred to me that I can't use p-B11 fusion on my whiskers because there's no room for a particle accelerator. shoot.
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Post by Kerr on Aug 30, 2017 16:09:47 GMT
Its rather old. Look for lithium fuels at rocket witch thread. Also lser thermal have some more flaws for your setting. I did some math. Details on said flaws? Also, if you have a notion on how to do the field strength equations for magnetic confinement nozzles I'd appreciate the input. I'm really looking to work out how much power I'd need to allow for. It also just occurred to me that I can't use p-B11 fusion on my whiskers because there's no room for a particle accelerator. shoot. You can only use DT, DD and D-He3 on something the size of an missile. I've listed stats for that and how it would work. Being totally powered by the MHDs of said missile. Also tvere is an fusion rocket on atomic rocket under realistoc designs. Dry mass: 20t, Wet mass: 40-65 tons, depending on DT/DHe3. And 5G on min. Acceleration. 7Mm/s Dv. I have to collect my notes for the laser thermal missile. But first I am gonna eat my steak.
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Post by Kerr on Aug 30, 2017 16:27:15 GMT
Its rather old. Look for lithium fuels at rocket witch thread. Also lser thermal have some more flaws for your setting. I did some math. Details on said flaws? Also, if you have a notion on how to do the field strength equations for magnetic confinement nozzles I'd appreciate the input. I'm really looking to work out how much power I'd need to allow for. It also just occurred to me that I can't use p-B11 fusion on my whiskers because there's no room for a particle accelerator. shoot. An 10t Laser Missile powered by an 20GW Laser produces an isp of 9,500 and 375 kN. Given an mass ratio of 2 the Dv of the missile will be 65km/s. The acceleration ranges from 3.75G to 7.5G. Giving you an average acceleratiin of 55m/s. At this rate the missile will have to accelerate for 20 mins. The missile will have covered half an light second by then. An 10m mirror can focus an 9nm beam to an 20cm diameter circle at that distance. This all means that your Cratos ship can only launch 9 laser missiles per hour. And for that price you get missiles that aren't even that much better than your MH Drones.
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Post by Kerr on Aug 30, 2017 17:13:44 GMT
ironclad6 What superconductor are you using? What's the radius of your coils?
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Post by ironclad6 on Aug 30, 2017 17:18:20 GMT
Details on said flaws? Also, if you have a notion on how to do the field strength equations for magnetic confinement nozzles I'd appreciate the input. I'm really looking to work out how much power I'd need to allow for. It also just occurred to me that I can't use p-B11 fusion on my whiskers because there's no room for a particle accelerator. shoot. An 10t Laser Missile powered by an 20GW Laser produces an isp of 9,500 and 375 kN. Given an mass ratio of 2 the Dv of the missile will be 65km/s. The acceleration ranges from 3.75G to 7.5G. Giving you an average acceleratiin of 55m/s. At this rate the missile will have to accelerate for 20 mins. The missile will have covered half an light second by then. An 10m mirror can focus an 9nm beam to an 20cm diameter circle at that distance. This all means that your Cratos ship can only launch 9 laser missiles per hour. And for that price you get missiles that aren't even that much better than your MH Drones. Makes sense. Whisker IV is actually a re-useable design driven by a P4 micro-fusion bottle. The KSOW Mk X is a 16kg LOX/LH2 driven weapon. Whisker IV boosts the missile into the region of ~100 km/sec and then peels away, returning to the mothership if possible. KSOW Mk X then burns it's own propellant for terminal homing, having no further need to build KE.
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Post by Kerr on Aug 30, 2017 17:25:00 GMT
An 10t Laser Missile powered by an 20GW Laser produces an isp of 9,500 and 375 kN. Given an mass ratio of 2 the Dv of the missile will be 65km/s. The acceleration ranges from 3.75G to 7.5G. Giving you an average acceleratiin of 55m/s. At this rate the missile will have to accelerate for 20 mins. The missile will have covered half an light second by then. An 10m mirror can focus an 9nm beam to an 20cm diameter circle at that distance. This all means that your Cratos ship can only launch 9 laser missiles per hour. And for that price you get missiles that aren't even that much better than your MH Drones. Makes sense. Whisker IV is actually a re-useable design driven by a P4 micro-fusion bottle. The KSOW Mk X is a 16kg LOX/LH2 driven weapon. Whisker IV boosts the missile into the region of ~100 km/sec and then peels away, returning to the mothership if possible. KSOW Mk X then burns it's own propellant for terminal homing, having no further need to build KE. Cool, just replace the P4 Fusion. Its even harder than p-B11 fusion, which already requires billions kelvins or particle accelerators. Also MC-Fusion drives can weight down to 600kg. But they have horrible thrust.
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Post by ironclad6 on Aug 30, 2017 17:34:04 GMT
Makes sense. Whisker IV is actually a re-useable design driven by a P4 micro-fusion bottle. The KSOW Mk X is a 16kg LOX/LH2 driven weapon. Whisker IV boosts the missile into the region of ~100 km/sec and then peels away, returning to the mothership if possible. KSOW Mk X then burns it's own propellant for terminal homing, having no further need to build KE. Cool, just replace the P4 Fusion. Its even harder than p-B11 fusion, which already requires billions kelvins or particle accelerators. Also MC-Fusion drives can weight down to 600kg. But they have horrible thrust. Weirdly, when I switched from metallic hydrogen to LOX/LH2 my KSOWS stopped being able to hit anything. Thanks for the input on P4. It seemed too good to be true.
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Post by Kerr on Aug 30, 2017 17:45:41 GMT
Cool, just replace the P4 Fusion. Its even harder than p-B11 fusion, which already requires billions kelvins or particle accelerators. Also MC-Fusion drives can weight down to 600kg. But they have horrible thrust. Weirdly, when I switched from metallic hydrogen to LOX/LH2 my KSOWS stopped being able to hit anything. Thanks for the input on P4. It seemed too good to be true. Maybe it is a sign. To switch to Flourine/Lithium Hydride. Also do you use LOX? Flourine hydrogen is better. I am always there to nerf everyones fusion spacecrafts. Nuclear shaped charges and NEFPs are also not safe.
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Post by ironclad6 on Aug 30, 2017 17:48:38 GMT
Weirdly, when I switched from metallic hydrogen to LOX/LH2 my KSOWS stopped being able to hit anything. Thanks for the input on P4. It seemed too good to be true. Maybe it is a sign. To switch to Flourine/Lithium Hydride. Also do you use LOX? Flourine hydrogen is better. I am always there to nerf everyones fusion spacecrafts. Nuclear shaped charges and NEFPs are also not safe. NEFP suffers more from being dumb than unsafe.
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Post by Kerr on Aug 30, 2017 17:55:50 GMT
Maybe it is a sign. To switch to Flourine/Lithium Hydride. Also do you use LOX? Flourine hydrogen is better. I am always there to nerf everyones fusion spacecrafts. Nuclear shaped charges and NEFPs are also not safe. NEFP suffers more from being dumb than unsafe. I am not talking about CDE NEFPs but the NEFP's and Casaba Howitzer from matterbeam. You use alot magnetic bottle fusion. Did you thought about using MHD and a MPDT? An 200GW p-B11 engine barely produces 25kN, but an MPDT with 100GW thrust power generates 1.4 MN while having an Isp high enough that using an mass ratio of 2 is sufficant to provide 100km/s delta-v. ironclad6For your Whisker IV.
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Post by ironclad6 on Aug 30, 2017 18:27:04 GMT
Type: Missile Propulsion: NSWR 20% UTB Isp: 6,728 Acceleration: 8-32 G Delta-v: 91.5km/s Wet mass: 40t Dry mass: 10t Engine mass: 5t The engine needs to have the twice the Thrust/weight ratio of the original design. But given the fact that you can use graphene which has twice the boiling point of most steel and titanium alloys plus dozens to hundred times the mechanical strenght this might be do-able. ironclad6 Yeah, this might be the general scope of AGDA. Sorry I didn't notice this post before.
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