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SciFi movies and pathetic misconceptions of tech failing for the story line.

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rdl:
https://en.wikipedia.org/wiki/The_Core

It's actually a pretty good movie if you can do a little belief suspension.


--- Quote from: MathWizard on April 20, 2023, 09:24:56 pm ---There's some disaster movie where they literally "fly" something like a Star Trek shuttle craft, into the CORE of the Earth, in modern times. There's sci-fi that does crazy stuff, but this is something else. It's not some tunnel boring machine either. I don't think it has lasers  or anything vaporizing the rock in front of them either. Maybe it did, but still.

--- End quote ---

coppercone2:
kinda wonder how good those ships would be if they have a force field, if you can stop all those explosions maybe the shield generator can backfeed to make a plasma drill, those shields all seem plasma based anyway. Startrek ships might be natural digging machines

tszaboo:

--- Quote from: Kim Christensen on April 19, 2023, 10:18:39 pm ---
--- Quote from: tszaboo on April 19, 2023, 09:21:18 pm ---
--- Quote from: Kim Christensen on April 18, 2023, 10:34:38 pm ---
--- Quote from: tszaboo on April 18, 2023, 10:03:59 pm ---So if you just burn radial out, this doesn't work at all, and you fall back to earth, quite fast.
--- End quote ---

You can, if you reach escape velocity, then you won't fall back to Earth. Less than escape velocity, then yes, you'll fall back.
So as long as you are traveling at more than 11.2 km/s away from Earth, it doesn't matter which direction you are going*. But this is not what we do when launching a satellite which we want to orbit the Earth. Then we need to lean the rocket into a gravity turn to give it horizontal velocity in addition to getting it out of the atmosphere. Ideally a satellite, in a perfectly circular orbit around a perfectly spherical Earth, has zero vertical velocity relative to the surface of the Earth.

*  Well, you might come back in a few years if your new solar orbit intersects that of Earth's orbit around the Sun. (That's why Elon's Tesla will pay us a visit sometime in the future)

--- End quote ---
Well, you are the one who is insisting into launching satellites with only radial out burns. And yes, of course if you leave the spere of influence of earth you don't fall back, but that's also a bad strategy to go into an orbit now, isn't it?

--- End quote ---

Nope... Just taking issue with the line highlighted above.
Of coarse, launching satellites meant to go into Earth orbit using that method would be a failure.
But you could go to Mars that way, instead of going into low Earth orbit first, but it's not done that way for various reasons.

--- End quote ---
You really gotta stop straw manning, or cherry picking some extreme boundary condition, where something doesn't apply.

Kim Christensen:

--- Quote from: tszaboo on April 20, 2023, 10:30:33 pm ---
--- Quote from: Kim Christensen on April 19, 2023, 10:18:39 pm ---
--- Quote from: tszaboo on April 19, 2023, 09:21:18 pm ---
--- Quote from: Kim Christensen on April 18, 2023, 10:34:38 pm ---
--- Quote from: tszaboo on April 18, 2023, 10:03:59 pm ---So if you just burn radial out, this doesn't work at all, and you fall back to earth, quite fast.
--- End quote ---

You can, if you reach escape velocity, then you won't fall back to Earth. Less than escape velocity, then yes, you'll fall back.
So as long as you are traveling at more than 11.2 km/s away from Earth, it doesn't matter which direction you are going*. But this is not what we do when launching a satellite which we want to orbit the Earth. Then we need to lean the rocket into a gravity turn to give it horizontal velocity in addition to getting it out of the atmosphere. Ideally a satellite, in a perfectly circular orbit around a perfectly spherical Earth, has zero vertical velocity relative to the surface of the Earth.

*  Well, you might come back in a few years if your new solar orbit intersects that of Earth's orbit around the Sun. (That's why Elon's Tesla will pay us a visit sometime in the future)

--- End quote ---
Well, you are the one who is insisting into launching satellites with only radial out burns. And yes, of course if you leave the spere of influence of earth you don't fall back, but that's also a bad strategy to go into an orbit now, isn't it?

--- End quote ---

Nope... Just taking issue with the line highlighted above.
Of coarse, launching satellites meant to go into Earth orbit using that method would be a failure.
But you could go to Mars that way, instead of going into low Earth orbit first, but it's not done that way for various reasons.

--- End quote ---
You really gotta stop straw manning, or cherry picking some extreme boundary condition, where something doesn't apply.

--- End quote ---

Just admit that you were wrong and move on.

NiHaoMike:

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