Dr_Extrem wrote...
David7204 wrote...
.......
very good point.
it is clear, that shepard would not survive the impact on the planet. but objects in orbit around earth - like satilites or the iss are very fast. this comparision does not work.
in that hight, there are still 98% of earths gravity pulling you back to earth.you have to work with centrifugal force, to counter the garvity of earth. in the case of the iss, you need 28000 km/h to biiuld up enough centrifugal force to "immitate" zero-g - it is the sweet spot, where both forces, centrifugal and gravity are even and neutralise each other.
shepard is not that fast ... maybe only several houndred km/h. the friction caused by this reentry-speed, is not that high. the impact force would kill shepard - even if the suit was not damaged but thats all. if the angle is right, the friction is kept to a minimum.
what is really problematic, is the atmosphere of the planet ... and what i dont get ... is that snow on alchera? ... in that atmoshere and the temperatures, any water would be bound to ammonia (hygroscopic) and both would build a solution (low melting point). the water would not build snow. the melting point of 30% ammonia in water is @ arp. -84°C.
i can let this slide but its an example of sloppy research. sci-fi is not easy to write ... you need to know what you are writing about and how stuff works.
Some interesting points.
The bioling point of water is 100 C. (~212 F). The point at which DNA denatures is variable depending on ATGC composition. But, a google search says that a 50% GC composition will denature at around 50 C. (Room temperature is around 20C ~ 70F )
We know that the friction from atmospheric drag is what causes the re-entry heat. We also know that the air density of the surface of the planet is low. However, the atmosphere is thick (with methane and ammonia), which means that the atmospheric density will be high. This will increase drag because aerodynamic drag is proportional to air density.
We know that Felix Baumgartner free-falled from just above the earth's atmospher and set a record for free fall speed at around 729 mph (1173 km/h) He survived.
We also know that Shepard isn't moving at free fall speed. He is moving at the speed that the Normandy was moving at when it was attacked by the Collector Ship. This speed and plus or minus the speed he would have gained or lost from the Normandy's mid-space explosion. So what speed was the normandy moving at, in comparison to the space shuttle, when it explodes? Faster? Slower? About the same? Assuming the Normandy can move faster than the space shuttle, I would say faster.
And we know that Shepard's space suit has leaks in it (presumably from the explosion of the normandy). Felix Baumgartner's was in a suit himself to protect himself from atmospheric drag. Assuming there were no leaks in it, it did the job well.
Is it realistically possible for someone to survive gravitational re-entry without burning up? Well Baumgartner proved it is possible. However, is it possible for someone not to burn up on re-entry with a broken suit and at extremely high orbital speeds? (that would be inferred from the chase scene. ) The boiling point of water really isn't that high and neither is the temperature for DNA denaturation.
Indeed, I believe Shepard's body would be charred to a crisp. Lets go back and look at the first 20 seconds of the revival scene of his body.
www.youtube.com/watch What I see is automated arms trying to reconstruct the dehydrated and charred remains of Shepard. I think what is inferred in the first 20 seconds is that his body did indeed burn up on re-entry.
Modifié par mvaning, 20 février 2013 - 06:48 .
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Seriously?
