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Post by argonbalt on Mar 30, 2017 3:39:38 GMT
So this is exactly what it sounds like, as miniaturisation of reactors has produced smaller and smaller models, i got to thinking. We should really have a competition to see if we can design a power armour capable reactor. Additionally the radiator and jump jet would also be neat to design.
Regulations:
PART 1 Reactor 1 metre height/15cm radius 1 Kw output power weight should ideally be under 1000kg-500kg heat should be as low as possible ideally less than 4 kw radiation hazard should be as low as possible, max no more than 500w
PART 2 Radiator
Should be able to handle all waste heat from reactor can be multiple small units instead of one big one double efficiency also possible as a flat mount using one side NOTE only on side of the radiator must be capable of dumping all reactor heat.
PART 3 Resisto Jet
Resisto jet should be no larger than 30 cm in diameter Smaller multiple jets are possible All jet(s) must be able to lift approximately 332 kg of Lunar weight, or be able to apply about 550 n of thrust to lift suit
I look forward to seeing what people can create!
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Post by someusername6 on Mar 30, 2017 5:23:12 GMT
... probably should be moved to Gameplay discussion though.
Edit: maybe? We can deploy the components in game but not the power armour as a whole. Picture comparisons with human notwithstanding. I'll try to make something either way; heat limit seems to be the hardest constraint right now.
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Post by argonbalt on Mar 30, 2017 5:50:34 GMT
... probably should be moved to Gameplay discussion though. Edit: maybe? We can deploy the components in game but not the power armour as a whole. Picture comparisons with human notwithstanding. I'll try to make something either way; heat limit seems to be the hardest constraint right now. Well the point is obviously not that we can make suits in game, merely that designing the sub components would be neat.
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Post by someusername6 on Mar 30, 2017 6:17:00 GMT
So it occurs to me that 1kW of power output and heat under 4 kW means an efficiency of 25% or more. Which probably implies a lower temperature, and a less compact radiator, making it not look very suit-like.
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Post by someusername6 on Mar 30, 2017 7:11:33 GMT
My concerns were overstated. Here's a prototype for the suit, along with a external drop tank and a cargo pod representing the weight of a slightly-above-average-weight human (60 kg cargo bay, weighting 66.3 kg). 41 seconds of flight time, 320 m/s of delta v. Not bad. The reactor is colder than I'd like, in order to comply with the specs, but still hot enough that the radiators are pretty small. They are redundant RCC radiators -- you could lose 1 and still have the reactor cooled down. The choice of resistojet propellant was quite restricted by the "you must vaporize the propellant" warnings, but we made it work for Luna. Anyone found anything better for this? Code for all components: 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
ResistojetModule 584 m/s 1.00 kW Carbon Dioxide Gimballed Resistojet UsesCustomName false PowerSupplied_W 1000 Propellant Carbon Dioxide CoilComposition Tantalum Hafnium Carbide ChamberLength_m 0.01 CoilRadius_m 0.0001 ThermalRocket ChamberComposition Boron ThroatRadius_m 0.001 ChamberWallThickness_m 0.00012 ChamberContractionRatio 8 NozzleExpansionRatio 1000 NozzleExpansionAngle_degrees 6.6 RegenerativeCooling_Percent 0 Injector Composition Polyethylene PumpRadius_m 0.047 RotationalSpeed_RPM 92 Gimbal InnerRadius_m 0.068 ArmorComposition Boron ArmorThickness_m 0.0001 MomentumWheels Composition Polyethylene RotationalSpeed_RPM 27000 GimbalAngle_degrees 90
PropellantTankModule 50.0 kg Carbon Dioxide Drop Tank UsesCustomName false Propellant Carbon Dioxide StructureComposition Boron ReactionMass_kg 50 HeightToRadiusRatio 5 AdditionalArmorThickness_m 0 External ExplosiveBoltMass_kg 1e-006 ExplosiveBoltComposition Cyclonite
CargoModule 60.0 kg Cargo Bay Mass_kg 60 AspectRatio 3
CraftBlueprint Suit Prototype Modules 1.00 kW Thermoelectric Fission Reactor 1 1.5457 null 0 0.2x0.10 Reinforced Carbon-Carbon Radiator 2 0.70642 1.00 kW Thermoelectric Fission Reactor 0 584 m/s 1.00 kW Carbon Dioxide Gimballed Resistojet 1 0.00082096 null 0 50.0 kg Carbon Dioxide Drop Tank 1 0.48571 null 1.53 Default Remote Control 1 1.4207 null 0 60.0 kg Cargo Bay 1 1.2957 null 0 Armor
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Post by RiftandRend on Mar 30, 2017 11:18:06 GMT
When you titled the thread "Powered Armor" I thought you were talking about Electric reactive armor.
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Post by RiftandRend on Mar 30, 2017 12:20:12 GMT
Here is my submission. Comes complete with a 9mm PDW. The Full Assembly The Resistojet The Reactor I don't think resistojets are practical with only 1 Kw. At this scale an ethylene oxide monopropellant rocket would a better choice. At 50-500 Kw the competition becomes much fairer.
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Post by evonix on Mar 30, 2017 14:57:04 GMT
I suspect a nuclear thermal rocket may actually be best on this or even a bi-prop if theres nothing better, if it's supposed to be power armor then effisincy is key and 500m/s shant cut it, not that I think that I can make anything even equal to whats already made though.
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Post by argonbalt on Mar 30, 2017 15:31:36 GMT
Wow these submissions are actually pretty great! I did not expect everyone to go for the whole set.
In regards to evonix
Yes a NTR would generally be a purer solution if you were just trying to jet a sod someplace quickly, The jets however are mainly for tactical manoeuvring over obstacles or between cover. And while a NTR is great for missiles, when on the ground the NTR would need some extensive conversion process to basically turn it back into a regular nuclear reactor to power the suit.
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Post by newageofpower on Mar 30, 2017 16:51:41 GMT
Erm. You'd just carry both a NTR and a reactor...
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Post by Durandal on Mar 30, 2017 16:55:47 GMT
Will somebody please mod in a way to use the spacesuit model for Marines in a way that allows us to attach these subsystems?
And the shuttle orbiter for Moonraker reinactments sensible Cold War simulations?
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Post by someusername6 on Mar 30, 2017 17:13:10 GMT
Will somebody please mod in a way to use the spacesuit model for Marines in a way that allows us to attach these subsystems? And the shuttle orbiter for Moonraker reinactments sensible Cold War simulations? That sounds pretty great. In the meantime, I propose argonbalt (or someone else) make a variant of this challenge, to have a ship able to carry these power armor placeholder drones, disable some ship, and bring the soldiers in contact with the disabled ship (at a speed of less than 10 m/s). And then we can play with boarding ships. Probably should include specs on minimum weight (can't believe I forgot to go look up the weight of a space suit) and max acceleration (can't kill the people inside).
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Post by Pttg on Mar 30, 2017 17:18:54 GMT
Keep in mind, if the power armor is operating in an atmosphere then your radiators can be dramatically more effective.
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Post by someusername6 on Mar 30, 2017 17:38:32 GMT
Keep in mind, if the power armor is operating in an atmosphere then your radiators can be dramatically more effective. You probably also need acceleration greater than the local gravity too, then. (I kind of want to try to relax some restrictions above to make a model with acceleration greater than 1g...)
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Post by argonbalt on Mar 30, 2017 17:59:48 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.
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