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Post by tuskerkerman on Apr 16, 2017 18:22:40 GMT
what I'm looking for is a gun system that can accurately fire a single projectile up to 250km/s. the larger the better. but the 250km/s mark is what I'm looking for.
in all my tinkering and homework what I have accomplished is a 500 ton capacitor railgun that can fire a 1 gram projectile at 61km/s. it suffers from catastrophic inaccuracy, and mass.
I'm looking into coilguns because you can better distribute the acceleration of the projectile, though I'm hitting some sever diminishing returns on adding more stages.
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Post by AdmiralObvious on Apr 16, 2017 18:42:54 GMT
I'm pretty sure that the best you can get is a railgun capable of hitting 103 km/s, and that's breaking a lot of factors giving a lot of errors. I'm not sure how easy it is to get something to go any faster than that without either mods, or exceptionally high cost and mass.
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Post by newageofpower on Apr 16, 2017 19:18:56 GMT
Coilguns are limited because the game forces us to use the same size capacitor every stage. If you could vary the capsize, then coils could approach or exceed rails in efficiency.
Our guns are acceleration limited; the stress on the projectile requires a minimal barrel length to prevent projectile breakup. We can hit 100km/s using a Vanadium Alloy bullet and a 50m long barrel, but to exceed 100km/s you'll need a longer barrel (currently not supported by CoADE) or a stronger bullet (pretty hard without nanomaterials like Borophene or Graphene).
A lighter capacitor material might be useful as well; doping Graphene and Borophene with additives might allow it to be superior to Hafnium Oxide.
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Post by someusername6 on Apr 16, 2017 20:36:36 GMT
Coilguns are limited because the game forces us to use the same size capacitor every stage. If you could vary the capsize, then coils could approach or exceed rails in efficiency. Our guns are acceleration limited; the stress on the projectile requires a minimal barrel length to prevent projectile breakup. We can hit 100km/s using a Vanadium Alloy bullet and a 50m long barrel, but to exceed 100km/s you'll need a longer barrel (currently not supported by CoADE) or a stronger bullet (pretty hard without nanomaterials like Borophene or Graphene). A lighter capacitor material might be useful as well; doping Graphene and Borophene with additives might allow it to be superior to Hafnium Oxide. Good argument to request longer barrels.
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Post by AdmiralObvious on Apr 16, 2017 20:58:16 GMT
Coilguns are limited because the game forces us to use the same size capacitor every stage. If you could vary the capsize, then coils could approach or exceed rails in efficiency. Our guns are acceleration limited; the stress on the projectile requires a minimal barrel length to prevent projectile breakup. We can hit 100km/s using a Vanadium Alloy bullet and a 50m long barrel, but to exceed 100km/s you'll need a longer barrel (currently not supported by CoADE) or a stronger bullet (pretty hard without nanomaterials like Borophene or Graphene). A lighter capacitor material might be useful as well; doping Graphene and Borophene with additives might allow it to be superior to Hafnium Oxide. Good argument to request longer barrels. 100 Meters simply isn't enough for some people.
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Post by newageofpower on Apr 16, 2017 21:31:12 GMT
Good argument to request longer barrels. 100 Meters simply isn't enough for some people. I for one, would not mind spinal mounting a 200m High Speed Frag Delivery Device in my assault carrier.
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Post by AdmiralObvious on Apr 16, 2017 21:57:08 GMT
100 Meters simply isn't enough for some people. I for one, would not mind spinal mounting a 200m High Speed Frag Delivery Device in my assault carrier. It would be glorious. Presuming we get actual gun radiators too.
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Post by newageofpower on Apr 16, 2017 22:49:36 GMT
I for one, would not mind spinal mounting a 200m High Speed Frag Delivery Device in my assault carrier. It would be glorious. Presuming we get actual gun radiators too. Radiators?!? Heresy. LDR everything.
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Post by tuskerkerman on Apr 17, 2017 4:23:00 GMT
yup, pretty much trying to make a space A-10, as it turns out I can always pump more juice into the gun to increase RoF, which has fixed the accuracy issue. can't find a way to increase the muzzle velocity though.
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Post by nerd1000 on Apr 17, 2017 8:54:50 GMT
Coilguns are limited because the game forces us to use the same size capacitor every stage. If you could vary the capsize, then coils could approach or exceed rails in efficiency. Our guns are acceleration limited; the stress on the projectile requires a minimal barrel length to prevent projectile breakup. We can hit 100km/s using a Vanadium Alloy bullet and a 50m long barrel, but to exceed 100km/s you'll need a longer barrel (currently not supported by CoADE) or a stronger bullet (pretty hard without nanomaterials like Borophene or Graphene). A lighter capacitor material might be useful as well; doping Graphene and Borophene with additives might allow it to be superior to Hafnium Oxide. A linear induction motor would be far more efficient than the reluctance motors we're dependent on now, and it wouldn't be affected by magnetic saturation of the materials.
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Post by newageofpower on Apr 17, 2017 16:54:50 GMT
Coilguns are limited because the game forces us to use the same size capacitor every stage. If you could vary the capsize, then coils could approach or exceed rails in efficiency. Our guns are acceleration limited; the stress on the projectile requires a minimal barrel length to prevent projectile breakup. We can hit 100km/s using a Vanadium Alloy bullet and a 50m long barrel, but to exceed 100km/s you'll need a longer barrel (currently not supported by CoADE) or a stronger bullet (pretty hard without nanomaterials like Borophene or Graphene). A lighter capacitor material might be useful as well; doping Graphene and Borophene with additives might allow it to be superior to Hafnium Oxide. A linear induction motor would be far more efficient than the reluctance motors we're dependent on now, and it wouldn't be affected by magnetic saturation of the materials. Probably, but we're hardly saturation limited- we're currently structurally limited.
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Post by nerd1000 on Apr 18, 2017 3:48:28 GMT
A linear induction motor would be far more efficient than the reluctance motors we're dependent on now, and it wouldn't be affected by magnetic saturation of the materials. Probably, but we're hardly saturation limited- we're currently structurally limited. When building coilguns I'm usually limited either by projectile shattering (too much acceleration) or the barrel shattering from thermal expansion stress (too inefficient!). It might be possible to get better performance if we didn't have the thermal expansion stress problem, and also fire rate would be improved. On a related topic, another thing I've noticed is that there are diminishing returns when you increase the length of a railgun barrel. The efficiency drops rapidly, leading to low fire rates and the barrel shattering problem. I've read about staged railguns where the projectile is accelerated by a series of rails, each with its own circuit. That change would reduce the inductance of the gun and potentially restore efficiency when the rails are very long.
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Post by newageofpower on Apr 18, 2017 4:13:33 GMT
Probably, but we're hardly saturation limited- we're currently structurally limited. When building coilguns I'm usually limited either by projectile shattering (too much acceleration) or the barrel shattering from thermal expansion stress (too inefficient!). It might be possible to get better performance if we didn't have the thermal expansion stress problem, and also fire rate would be improved. On a related topic, another thing I've noticed is that there are diminishing returns when you increase the length of a railgun barrel. The efficiency drops rapidly, leading to low fire rates and the barrel shattering problem. I've read about staged railguns where the projectile is accelerated by a series of rails, each with its own circuit. That change would reduce the inductance of the gun and potentially restore efficiency when the rails are very long. You're not approaching railgun design the same way I am. Around 104 km/s even a Vanadium Chrome bullet will shatter due to acceleration stress if barrel length is below 50m. Overcoming reluctance is not a huge issue; even my impractical superguns are over 44% efficient with the correct voltage, although I really want Boron with strips of superconductors for gun material.
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Post by lawson on Apr 18, 2017 14:59:04 GMT
Have to exploit a bug, but here's a 250Km/s gun as requested. With 5 meter long penetrators and no flak, this gun has a less than 1% chance of destroying the universe when it hits. (crashing the game)
RadiationShieldModule 131mg Aerogel Pen UsesCustomName true Composition Graphite Aerogel Dimensions_m 0.001 4.9
CraftBlueprint 131mg 5m pen Modules 131mg Aerogel Pen 1 0 null 0 Armor
RailgunModule 850MW 131mg pen shell Capacitor Railgun UsesCustomName true PowerConsumption_W 8.5e+008 Capacitor Count 1 DielectricComposition Hafnia Dimensions_m 2 0.48 Separation_m 0.000125 Rails Composition Zirconium Copper Thickness_m 0.47 Length_m 5 BarrelArmorThickness_m 0.777 Armature Composition Osmium BoreRadius_m 0.019 Mass_kg 0.001 Tracer null Payload 131mg 5m pen Loader PowerConsumption_W 330 Turret InnerRadius_m 2 Extruded true ArmorComposition Amorphous Carbon ArmorThickness_m 0.05 MomentumWheels Composition Selenium RotationalSpeed_RPM 770 TargetsShips true TargetsShots true
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Post by newageofpower on Apr 19, 2017 4:26:36 GMT
Have to exploit a bug, but here's a 250Km/s gun as requested. With 5 meter long penetrators and no flak, this gun has a less than 1% chance of destroying the universe when it hits. (crashing the game) RadiationShieldModule 131mg Aerogel Pen UsesCustomName true Composition Graphite Aerogel Dimensions_m 0.001 4.9
CraftBlueprint 131mg 5m pen Modules 131mg Aerogel Pen 1 0 null 0 Armor
RailgunModule 850MW 131mg pen shell Capacitor Railgun UsesCustomName true PowerConsumption_W 8.5e+008 Capacitor Count 1 DielectricComposition Hafnia Dimensions_m 2 0.48 Separation_m 0.000125 Rails Composition Zirconium Copper Thickness_m 0.47 Length_m 5 BarrelArmorThickness_m 0.777 Armature Composition Osmium BoreRadius_m 0.019 Mass_kg 0.001 Tracer null Payload 131mg 5m pen Loader PowerConsumption_W 330 Turret InnerRadius_m 2 Extruded true ArmorComposition Amorphous Carbon ArmorThickness_m 0.05 MomentumWheels Composition Selenium RotationalSpeed_RPM 770 TargetsShips true TargetsShots true I mean, if you don't care about exploiting a glitch you can pass 944 km/s... childrenofadeadearth.boards.net/post/15399/thread
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