Re: Space Travel by Humans is Possible

Einar <einarbb@xxxxxxxxx> wrote:

:On Jan 20, 1:19 pm, Fred J. McCall <fmcc...@xxxxxxxxxxxxx> wrote:
:> Einar <eina...@xxxxxxxxx> wrote:
:>
:> :On Jan 20, 3:23 am, Fred J. McCall <fmcc...@xxxxxxxxxxxxx> wrote::> Einar <eina...@xxxxxxxxx> wrote:
:>
:> :>
:> :> :On Jan 19, 7:30 pm, Fred J. McCall <fmcc...@xxxxxxxxxxxxx> wrote::> Einar <eina...@xxxxxxxxx> wrote:
:> :>
:> :> :>
:> :> :> :
:> :> :> :However, like Mr. navia pointed out, at the moment the technology to
:> :> :> :actually land humans on Mars doesn´t exist.
:> :> :> :
:> :> :>
:> :> :> What non-existent technology is required?
:> :> :>
:> :> :> All the requisite technologies exist so far as I can tell. All that's
:> :> :> required is the engineering to put those technologies together.
:> :> :>
:> :> :
:> :> :It´s called 'hypercone'...look it up.
:> :> :
:> :>
:> :> Do your own research. If you want to make your case, do so. If you
:> :> don't, feel free to *** off...
:> :>
:> :
:> :You don´t have to act stupit. There are stupit people aplenty as it
:> :is.
:> :
:>
:> Yes, there apparently are a lot of you.
:>
:> :
:> :The hypercone idea is an attempt at solving a geunine problem which
:> :exists for safe enough entry and landing on Mars:
:> :http://en.wikipedia.org/wiki/Hypercone_(spacecraft)
:> :
:>
:> I know what it is. It's one possible approach.
:>
:> :
:> :You can´t solve it with reaction mass. It´s not the Moon. If Mars
:> :would be like the Moon, i.e. airless, that solution would work. But as
:> :Mars has got athmosphere, but rather too thin, landing like on the
:> :Moon wont work.
:> :
:>
:> Of course it will. The whole argument that you can't do that kind of
:> powered reentry probably isn't correct. Go investigate how DC-X and
:> its descendents were intended to land here on Earth (with a much
:> thicker atmosphere than Mars).
:>
:> :
:> :Instead of acting like a know it all, you might instead read up a
:> :litle so you´ll in the future avoid spouting nonsence.
:> :
:>
:> Dickhead, know thyself...
:>
:> --
:> "Ignorance is preferable to error, and he is less remote from the
:> truth who believes nothing than he who believes what is wrong."
:> -- Thomas Jefferson
:
:I have, the DC-X would have used the thickness of Earth´s athmosphere
:to slow down below supersonic, i.e. using its heatshield, after which
:landing on a torch would have worked fine.
:

Uh, not quite. In many of the design studies the engine gas flow WAS
the 'heat shield'.

:
:But that won´t work with a Martian landing, because A) It´s not thick
:enough that we can land like on Earth, i.e. bring the craft beneath
:supersonic on the friction due to the heatshield alone, B)Yet it´s to
:thick that we can land like on the Moon, i.e. with retrorockets only.
:

No, it's not. You just have to carry more fuel. The rest is
engineering.

:
:We have to invent new way of landing, in order to land on Mars. A
:hypercone is the idea for a solution to that problem, i.e. the problem
:of getting the thing below supersonic airspeeds before applying the
:landing rockets.
:

But it's an unnecessary solution. It is ONE APPROACH. It's not
required.


--
"The reasonable man adapts himself to the world; the unreasonable
man persists in trying to adapt the world to himself. Therefore,
all progress depends on the unreasonable man."
--George Bernard Shaw
.

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