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Re: Mars Is a Hellhole

Wed Mar 17, 2021 6:55 am

What we need to do, is create a device like the one in "Total Recall", and send Arnold Schwarzenegger up there to activate it. It will kick-start Mars by melting its core, returning its magnetic field, and its atmosphere / water cycle. We had this figured out in 1990. Easy Peasy.
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Re: Mars Is a Hellhole

Wed Mar 17, 2021 8:42 am

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Re: Mars Is a Hellhole

Thu May 06, 2021 12:58 pm

Didn't see any comment on Starship sticking its landing yesterday.
Had a small fire on landing... probably less fire than the average Chevy Bolt!

So we are THIS close to going to mars:

"<----------------------------------------------------------------------------------------------------------------------------------------------------------------------------->"

Still, quite an awesome accomplishment.
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Re: Mars Is a Hellhole

Thu May 06, 2021 1:19 pm

Probably there was no comment because there was nothing to be ridiculed about for yesterday's flight.

I don't comment here because this thread is full of "not-useful-commentary". But I follow SpaceX closely and have watched the flight of every prototype in Boca Chica, most as they happened. What SpaceX is working on down there is another massive sea change in space transportation.
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Re: Mars Is a Hellhole

Thu May 06, 2021 3:08 pm

I'm sure that some of us wanted to comment on the first non-explosive landing (small fire notwithstanding, I guess) of a craft that's supposed to be used to carry crews on long missions, but we just didn't bother. Now at least they can start a placard board with "This facility has gone 1 days without a Star Ship explosion.
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Re: Mars Is a Hellhole

Thu May 06, 2021 3:22 pm

jlv wrote:
Thu May 06, 2021 1:19 pm
Probably there was no comment because there was nothing to be ridiculed about for yesterday's flight.

I don't comment here because this thread is full of "not-useful-commentary". But I follow SpaceX closely and have watched the flight of every prototype in Boca Chica, most as they happened. What SpaceX is working on down there is another massive sea change in space transportation.
I agree. It seems more of the world expects a Mars mission to happen after yesterday.

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Re: Mars Is a Hellhole

Thu May 06, 2021 4:54 pm

jlv wrote:
Thu May 06, 2021 1:19 pm
Probably there was no comment because there was nothing to be ridiculed about for yesterday's flight.

I don't comment here because this thread is full of "not-useful-commentary". But I follow SpaceX closely and have watched the flight of every prototype in Boca Chica, most as they happened. What SpaceX is working on down there is another massive sea change in space transportation.
Gotta be tough to descend onto your own exhaust plume. Looks like they're getting it sorted out. Still strikes me as a radical maneuver, but after a few successful landings no doubt I'll see it as a lot more normal, like what happened with Falcon 9.
I noticed you're still working with polymers.

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Re: Mars Is a Hellhole

Fri May 07, 2021 8:26 am

LeftieBiker wrote:
Thu May 06, 2021 3:08 pm
first non-explosive landing (small fire notwithstanding, I guess) of a craft that's supposed to be used to carry crews on long missions
Sigh. This is not a craft that is supposed to carry crews on long missions.

These are a series of incremental, experimental prototypes of a whole new launch system. Each flight is testing new parts of the flight envelope. SN8 flying to 40K feet on 3 newly developed engines of a type never used before (*) was in and of itself a massive achievement. A successful landing hasn't been the goal of any flight *until* SN15 (this most recent one).

Many revisions from now there will come a vehicle derived from these early prototypes that will carry crews on long missions. Those won't explode.

No launch system has ever been developed this way before, using an agile like approach, with the process visible to the public. You can compare this to the development of SLS, 6 years late and billions over budget. When it flies next year (or the year after, since its schedule slips and slips) it will certainly not blow up. The flight alone will cost nearly $1.5B on top of the tens of billions spent on it's development. Meanwhile, each Starship prototype is costing about $15M (of which SpaceX is self funding).



(*) https://www.youtube.com/watch?v=LbH1ZDImaI8
is a good background description of the Raptor engine; non video version: https://everydayastronaut.com/raptor-engine/
This was created before any Raptor engines had flown, which was only 2 years ago.
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Re: Mars Is a Hellhole

Fri May 07, 2021 8:39 am

jlv wrote:
Thu May 06, 2021 1:19 pm
What SpaceX is working on down there is another massive sea change in space transportation.
Rocket equation hasn't changed.

About the only things that would change space transportation would be an elevator. And material science doesn't work for that yet. Or fusion drive. And we need working, practical and reliable fusion reactors for that. Fusion drive probably is well less than 1G, so would need to be assembled in orbit.

Oh, Mars is reachable with chemical rockets. Might even be able to send a person and have them arrive alive. But Mars is still a Hellhole, and we can't change that.
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jlv
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Re: Mars Is a Hellhole

Fri May 07, 2021 8:48 am

WetEV wrote:
Fri May 07, 2021 8:39 am
jlv wrote:
Thu May 06, 2021 1:19 pm
What SpaceX is working on down there is another massive sea change in space transportation.
Rocket equation hasn't changed.
Yes, that's why Starship/Superheavy remains a TSTO system. But a fully reusable TSTO system.
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