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Originally posted by KrazyHorse
Probably more like 1/3
10 kt is a slight overestimate, I think
It shouldn't really be surprising; at launch, the Saturn V weighed over 6000 tons, most of which was fuel and oxidizer...
EDIT: actually, you should cut my previous estimates in half. Saturn V weighed ~3000 tons. The heat of combustion of its major fuel component (RP-1, a highly-refined kerosene) is slightly more than 3 times that of TNT. However, RP-1 requires an oxidizer in the ratio 2.25 to 1 or so, giving the Saturn V overall approximately the same chemical energy density as TNT. So call it 3 kt TNT equivalent = 1/6 of Hiroshima. Lethality range scales as something like E^1/2, meaning that you would probably have survived a Saturn V crash-and-burn from half a mile. You wouldn't have been very happy though. 1st-2nd degree burns over every exposed surface. Blindness (possibly temporary; depends how quickly you managed to close your eyes)I came upon a barroom full of bad Salon pictures in which men with hats on the backs of their heads were wolfing food from a counter. It was the institution of the "free lunch" I had struck. You paid for a drink and got as much as you wanted to eat. For something less than a rupee a day a man can feed himself sumptuously in San Francisco, even though he be a bankrupt. Remember this if ever you are stranded in these parts. ~ Rudyard Kipling, 1891
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Someone set them up the bomb.
-=Vel=-
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Originally posted by DanS
Interesting. What about the 450 tons of liquid hydrogen and liquid oxygen on the second stage?
RP-1 heat combustion = 43 MJ/kg
RP-1 oxidizer ratio = 2.25 to 1
RP-1 + oxidizer heat of reaction = 43 / (1 + 2.25) = 13.2 MJ/kg
H2 heat combustion = 112 MJ/kg
H2 oxidizer ratio = 8 to 1 (2 H2 + O2 = 2 H2O, molar mass H2 = 2, molar mass O2 = 32)
H2 + oxidizer heat of reaction = 112 / (1 + 8) = 12.4 MJ/kg
H2, however, has a better specific impulse (because its combustion product is H2O, while RP-1 combusts to form both H2O and CO2. CO2 is heavier than H2O, which is a bad thing in rocketry).
In other words, the fact that 450 tons of the Saturn V is H2 + oxidizer actually diminishes the initial approximation of the energy (based on the idea that its weight is entirely RP-1 + oxidizer). The change is miniscule, however. Order of 1%12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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The heat of combustion of TNT, for comparison purposes, is 15 MJ/kg12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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Damnit, just looked it up. My memory was wrong on heat of combustion of H2. 142 MJ/kg means that the specific heat of reaction of the H2 + oxidizer mixture is actually slightly higher than that of RP-1 + oxidizer. 15.8 MJ/kg or so
Again, not that this is going to make much of a difference. One sixth change in one sixth of the mass means that the total should be pushed up less than 3%...12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
Comment
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The abort button should have been hit. They had more than enough time to detonate the rocket above the ground once their telemetry told them that the engines had cut out.12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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Could you please define "range of lethality"? Thanks.I came upon a barroom full of bad Salon pictures in which men with hats on the backs of their heads were wolfing food from a counter. It was the institution of the "free lunch" I had struck. You paid for a drink and got as much as you wanted to eat. For something less than a rupee a day a man can feed himself sumptuously in San Francisco, even though he be a bankrupt. Remember this if ever you are stranded in these parts. ~ Rudyard Kipling, 1891
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Fuzzy concept. Distance at which an unprotected human being would stand a significant chance of dying from the blast in the open.
Half a mile from a 3 kt non-radioactive blast would probably give you somewhere between a 90 and 99% chance of survival. That's also about the range that you expect severe damage to a standard wood-frame house (all glass shattered, significant structural damage)Last edited by KrazyHorse; March 13, 2006, 15:08.12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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1 mile from non-radioactive 3 kt blast and the only really severe injuries would be visual and those caused by flying glass. A wood-frame house would sustain appreciable damage, but would certainly not collapse12-17-10 Mohamed Bouazizi NEVER FORGET
Stadtluft Macht Frei
Killing it is the new killing it
Ultima Ratio Regum
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