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Post by RiftandRend on Oct 16, 2017 16:54:39 GMT
Material Solid Zubrol
Elements H O U-235 U-238 Br
ElementCount 2 1 0.004 0.016 0.08
Density_kg__m3 1100
EnthalpyOfFormation_kJ__mol 101817
ThermalConductivity_W__m_K .609
YoungsModulus_GPa .029
ShearModulus_GPa .010
SpecificHeat_J__kg_K 4183.95
RefractiveIndex Water
Material Solid Depleted Zubrol
Elements H O U-235 U-238 Br Kr Ba
ElementCount 2 1 0.00399 0.016 0.08 0.00001 0.00001
Density_kg__m3 1100
EnthalpyOfFormation_kJ__mol -285.83
ThermalConductivity_W__m_K .609
YoungsModulus_GPa .029
ShearModulus_GPa .010
SpecificHeat_J__kg_K 4183.95
RefractiveIndex Water
ChemicalReaction Zubrin Gun
Reactants Solid Zubrol
ReactantCounts 1
Products Solid Depleted Zubrol
ProductCounts 1
ActivationEnergy_kJ__mol 0.01
AutoignitionTemperature_K 273
You really need graphene to make this stuff work properly, but the results are very impressive  |
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Post by n2maniac on Oct 16, 2017 17:56:05 GMT
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Post by RiftandRend on Oct 16, 2017 18:45:06 GMT
This is simply the NSWR Chemical Rocket reaction taken from the future propulsion thread made into an explosive. The mixture is ~28% uranium by mass, and about 20% enriched. The reaction seems to assume .0025% fission. The chemical gun equations obviously break down at these energies. Even with over 2 Gj of energy being released inside it, the barrel walls only heat by .003 K... |
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Post by n2maniac on Oct 16, 2017 18:53:27 GMT
I suspect the equations on the heating assume it is all convection, ignoring IR (and nuclear) radiation. Don't know how effective convection is on that timescale, but definitely seems off.
Based on the micronukes people come up with, it would be curious to make a nuclear-charged cannon (if a number of things didn't cause this to not work too well).
What is the specific strength of the graphene material (or link to the material mod thread)?
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Post by RiftandRend on Oct 16, 2017 18:59:29 GMT
I suspect the equations on the heating assume it is all convection, ignoring IR (and nuclear) radiation. Don't know how effective convection is on that timescale, but definitely seems off. Based on the micronukes people come up with, it would be curious to make a nuclear-charged cannon (if a number of things didn't cause this to not work too well). What is the specific strength of the graphene material (or link to the material mod thread)? Material Graphene
Elements C
ElementCount 1
Density_kg__m3 2300
IsNanostructured true
YieldStrength_MPa 130000
UltimateTensileStrength_MPa 130000
YoungsModulus_GPa 800
ShearModulus_GPa 280
BulkModulus_GPa 8
MeltingPoint_K 4900
SpecificHeat_J__kg_K 51930
ThermalConductivity_W__m_K 2500
ThermalExpansion__K -8e-6
ThermoelectricSensitivity_V__K 9e-5
Resistivity_Ohm_m 3.3e-6
RefractiveIndex Graphite
RoughnessCoefficient 0.9Here's the Graphene code. The NSWR reaction may need a refurbishing, it assumes .0025% fission of U-235 but releases the energy as if .003% fissioned. |
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Post by Kerr on Oct 16, 2017 19:11:08 GMT
What a beauty, but I seriously doubt that you can make a chain reaction with milligrams worth of uranium.
Most (<90%) of the reactions energy will be in form of thermal energy, so this reaction is rather accurate.
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Post by RiftandRend on Oct 16, 2017 22:19:13 GMT
What a beauty, but I seriously doubt that you can make a chain reaction with milligrams worth of uranium. Most (<90%) of the reactions energy will be in form of thermal energy, so this reaction is rather accurate. That was an initial test, and uses ~260 mg of 25% enriched uranium. That's around the maximum you can use without nanomaterials. |
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Post by n2maniac on Oct 17, 2017 0:21:47 GMT
I suspect the equations on the heating assume it is all convection, ignoring IR (and nuclear) radiation. Don't know how effective convection is on that timescale, but definitely seems off. Based on the micronukes people come up with, it would be curious to make a nuclear-charged cannon (if a number of things didn't cause this to not work too well). What is the specific strength of the graphene material (or link to the material mod thread)? Material Graphene
Elements C
ElementCount 1
Density_kg__m3 2300
IsNanostructured true
YieldStrength_MPa 130000
UltimateTensileStrength_MPa 130000
YoungsModulus_GPa 800
ShearModulus_GPa 280
BulkModulus_GPa 8
MeltingPoint_K 4900
SpecificHeat_J__kg_K 51930
ThermalConductivity_W__m_K 2500
ThermalExpansion__K -8e-6
ThermoelectricSensitivity_V__K 9e-5
Resistivity_Ohm_m 3.3e-6
RefractiveIndex Graphite
RoughnessCoefficient 0.9Here's the Graphene code. The NSWR reaction may need a refurbishing, it assumes .0025% fission of U-235 but releases the energy as if .003% fissioned. Graphene flywheels would be more energy dense that high performance rocket fuels (eg. H2+F2) or explosives (by far). This seems like good candidate material for projectiles. |
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Post by treptoplax on Oct 19, 2017 23:45:10 GMT
Well, there's the simpler form of this that's already been demonstrated: nuclearweaponarchive.org/Usa/Tests/Plumbob.html#PascalBA US nuke test semi-accidentally launched a metal plate weighing hundreds of Kg at a velocity over 50Km/s... Edit:. Ah n2maniac mentioned this already above, I missed that on first reading. |
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