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Post by someusername6 on Mar 30, 2017 18:23:49 GMT
Erm. You'd just carry both a NTR and a reactor... Okay now i feel like this may have been answered before, but as the propellant is also the coolant, wouldn't you need to build another set of radiators for the "cold" period when you are not actively using it? Not to mention the increased radiation load on top of the already active reactor strapped to your back, the resisto jet seemed to be the safest and redundant system. You would keep the control rods in the subcritical position when the NTR is not in use; this should reduce the radiation and heat plenty as you are not having chain reactions. (Not sure the game models it though.)
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Post by newageofpower on Mar 30, 2017 19:09:02 GMT
Erm. You'd just carry both a NTR and a reactor... Okay now i feel like this may have been answered before, but as the propellant is also the coolant, wouldn't you need to build another set of radiators for the "cold" period when you are not actively using it? Not to mention the increased radiation load on top of the already active reactor strapped to your back, the resisto jet seemed to be the safest and redundant system. Unlike with a Molten-Metal cooled reactor, a NTR can be turned on and off far more quickly (though it is still not instant). When fully "off", the NTR should generate very little heat aside from radioactive decay, but this is likely to be a non-issue (i.e. passive radiative cooling will keep system from melting down) unlike with most reactors.
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Post by argonbalt on Mar 31, 2017 0:17:23 GMT
but is the thrust boost worth it? Id say the biggest boost is if the total amount of thrust and burn time is superior to a resisto-reactor propellant combo. Granted the thruster is not supposed to be the primary mobility mechanism, just a jet boost.
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Post by someusername6 on Mar 31, 2017 0:33:39 GMT
but is the thrust boost worth it? Id say the biggest boost is if the total amount of thrust and burn time is superior to a resisto-reactor propellant combo. Granted the thruster is not supposed to be the primary mobility mechanism, just a jet boost. I think so? Here's a variant on my submission using a decane NTR instead (with total radiation levels still under 70 W), and with the full suit loadout. And a gun, and ammo. It's good enough you could use it on Earth's surface with the tank full. ConventionalGunModule 32mm Turreted Cannon UsesCustomName false Barrel Composition Boron Length_m 0.33 Thickness_m 0.0021 Propellant Composition Octogen Mass_kg 0.0038 GrainRadius_m 0.00014 Projectile Composition Gamma Titanium Aluminide BoreRadius_m 0.016 Mass_kg 0.003 Tracer Titanium Payload null Loader PowerConsumption_W 17 Turret InnerRadius_m 0.057 Extruded true ArmorComposition Graphite Aerogel ArmorThickness_m 0.01 MomentumWheels Composition UHMWPE RotationalSpeed_RPM 8600 TargetsShips true TargetsShots true
ThermoelectricFissionReactorModule 1.00 kW Thermoelectric Fission Reactor UsesCustomName false ReactorCoreDimensions_m 0.017 0.081 NuclearReactor Coolant Hydrogen Moderator Graphite ModeratorMass_kg 0 Fuel U-233 Dioxide FuelMass_kg 0.1 FuelEnrichment_Percent 0.0538 ControlRodComposition Boron Nitride ControlRodMass_kg 0.023 NeutronReflector Boron Nitride ReflectorThickness_m 0 AverageNeutronFlux__m2_s 2.2e+017 InnerTurbopump Composition Boron Nitride PumpRadius_m 0.031 RotationalSpeed_RPM 400 ThermocoupleInnerDimensions_m 0.013 0.023 Thermocouple PTypeComposition Osmium NTypeComposition Tungsten Length_m 0.001 ThermocoupleExitTemperature_K 1370 OuterCoolant Ethane OuterTurbopump Composition Polyethylene PumpRadius_m 0.01 RotationalSpeed_RPM 9.8
RadiatorModule 0.2x0.10 Reinforced Carbon-Carbon Radiator UsesCustomName false Composition Reinforced Carbon-Carbon PanelWidth_m 0.1 Height_m 0.1 Thickness_m 0.001 ArmorThickness_m 0.001 Panels 2 FrontTaper_radians 0 BackTaper_radians 0 SurfaceFinish null
NuclearThermalRocketModule 5.07 km/s Decane Gimballed Nuclear Thermal Rocket UsesCustomName false ReactorCoreHeight_m 0.01 NuclearReactor Coolant Decane Moderator Boron Nitride ModeratorMass_kg 0 Fuel U-233 Dioxide FuelMass_kg 0.1 FuelEnrichment_Percent 0.97 ControlRodComposition Boron Nitride ControlRodMass_kg 0.099 NeutronReflector Boron Carbide ReflectorThickness_m 0.078 AverageNeutronFlux__m2_s 1.1e+019 ThermalRocket ChamberComposition Boron ThroatRadius_m 0.011 ChamberWallThickness_m 0.0001 ChamberContractionRatio 19 NozzleExpansionRatio 31 NozzleExpansionAngle_degrees 12 RegenerativeCooling_Percent 0.031 Injector Composition Polyethylene PumpRadius_m 0.042 RotationalSpeed_RPM 140 Gimbal InnerRadius_m 0.061 ArmorComposition Silica Aerogel ArmorThickness_m 0.01 MomentumWheels Composition UHMWPE RotationalSpeed_RPM 48000 GimbalAngle_degrees 7
CargoModule 225 kg Cargo Bay Mass_kg 225 AspectRatio 3
PropellantTankModule 60.0 kg Decane Drop Tank UsesCustomName false Propellant Decane StructureComposition Boron ReactionMass_kg 60 HeightToRadiusRatio 5 AdditionalArmorThickness_m 0 External ExplosiveBoltMass_kg 1e-006 ExplosiveBoltComposition Cyclonite
ConventionalGunModule 32mm Turreted Cannon UsesCustomName false Barrel Composition Boron Length_m 0.33 Thickness_m 0.0021 Propellant Composition Octogen Mass_kg 0.0038 GrainRadius_m 0.00014 Projectile Composition Gamma Titanium Aluminide BoreRadius_m 0.016 Mass_kg 0.003 Tracer Titanium Payload null Loader PowerConsumption_W 17 Turret InnerRadius_m 0.057 Extruded true ArmorComposition Graphite Aerogel ArmorThickness_m 0.01 MomentumWheels Composition UHMWPE RotationalSpeed_RPM 8600 TargetsShips true TargetsShots true
AmmoModule 1000x 32mm Cannon Round UsesCustomName false SuppliedModule 32mm Turreted Cannon AmmoBay Capacity 1000 Stacks 60 ArmorComposition Boron ArmorThickness_m 0.005
CraftBlueprint Suit Prototype 2 Modules 1.00 kW Thermoelectric Fission Reactor 1 1.5457 null 0 0.2x0.10 Reinforced Carbon-Carbon Radiator 2 1.4017 1.00 kW Thermoelectric Fission Reactor 0 5.07 km/s Decane Gimballed Nuclear Thermal Rocket 1 0 null 0 Default Remote Control 1 1.4207 null 0 225 kg Cargo Bay 1 1.2957 null 0 60.0 kg Decane Drop Tank 1 1.2334 null 1.57 1000x 32mm Cannon Round 1 1.4832 null 0 32mm Turreted Cannon 1 1.6347 null 4.71 Armor
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Post by argonbalt on Mar 31, 2017 0:35:38 GMT
damn i was actually gonna make a earth regulations bracket as well.
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Post by someusername6 on Mar 31, 2017 0:37:48 GMT
damn i was actually gonna make a earth regulations bracket as well. Well, go ahead and do it? Making these is fun, as is thinking about actually using them in game.
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Post by goduranus on Mar 31, 2017 2:55:01 GMT
Why not chemical rockets? I think NTR would be too much radiation hazard for the shielding a soldier can carry on his back.
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ndeo
Junior Member
It's not a flashlight... It's a High-frequency relativistic boson cannon
Posts: 67
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Post by ndeo on Mar 31, 2017 4:01:18 GMT
While I was designing the reactorpack, I decided to go for one suitable for atmospheric use. It trades low heat generation for low mass and high performance, and is able to be carried by standard ground infantry at just 39.3Kg. The foldable radiators double as wings* and the generators have a relatively low output temperature of just 420K. 150W Free power for other systems *(Use at own risk, No insurance - Liberty Exchange) The ReactorpackModified reactor from the standards thread for high efficiency, low temperatures and Rad-safeResistojet Imgur doesn't work at the moment
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Post by RiftandRend on Mar 31, 2017 4:57:34 GMT
NTRs are very good for EVA suits. With properly designed engines radiation is not a problem. Here is an NTR suit I built as an example. And here are the NTRs. (the reaction wheels are lithium)
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Post by RiftandRend on Mar 31, 2017 5:34:20 GMT
Imgur doesn't work at the moment Pretty sure Imgur is working.
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Post by goduranus on Mar 31, 2017 9:04:27 GMT
NTRs are very good for EVA suits. With properly designed engines radiation is not a problem. You can block neutrons with Li-6 but what about gamma rays?
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Post by RiftandRend on Mar 31, 2017 9:18:27 GMT
NTRs are very good for EVA suits. With properly designed engines radiation is not a problem. You can block neutrons with Li-6 but what about gamma rays? Mass? 42cm of Boron Nitride seems to work fine.
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Post by thorneel on Mar 31, 2017 10:25:33 GMT
Here's a variant on my submission using a decane NTR instead (with total radiation levels still under 70 W) Isn't 70 W way, way too much radiation? You should add a max radiation condition. For example, it has to be put on a crew module without raising a radiation error. (What is the least effective shielding material for test crew module walls?) Also, I hope your NTR is made with draconian norms. Spewing uranium and fission products, even in minute quantities, could durably contaminate both the suit's exterior and the ground. Also, be very, very careful to never point that engine bell at anyone, the internal radiation shield most probably has no effect in that direction. All in all, I would forbid NTR for any personal and/or surface use.
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Post by goduranus on Mar 31, 2017 10:49:07 GMT
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Post by someusername6 on Mar 31, 2017 12:09:38 GMT
Here's a variant on my submission using a decane NTR instead (with total radiation levels still under 70 W) Isn't 70 W way, way too much radiation? You should add a max radiation condition. For example, it has to be put on a crew module without raising a radiation error. (What is the least effective shielding material for test crew module walls?) Also, I hope your NTR is made with draconian norms. Spewing uranium and fission products, even in minute quantities, could durably contaminate both the suit's exterior and the ground. Also, be very, very careful to never point that engine bell at anyone, the internal radiation shield most probably has no effect in that direction. All in all, I would forbid NTR for any personal and/or surface use. It certainly is too much radiation. Spec says 500 W, though I seem to remember 70 W not sure why. The relevant components should be encased in radiation shielding but I am not sure there is a way of doing that on game (other than shielding in the NTR itself, which must satisfy a much harsher melting point criteria). Shame about the environment too. Might need to switch into chemical propulsion with harmless products instead.
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