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SpaceX: Making Life Multiplanetary [video]

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Re: SpaceX: Making Life Multiplanetary [video]

#31

Musk's speaking is always a little awkward (in an endearing way), but did he seem significantly more nervous/emotionally affected than usual in the first part of this speech? It seemed that way to me, curious if anyone else interpreted it like that. He calms down when he starts talking about risk and it being the anniversary of a launch. edit: Good and fun presentation regardless! edit2: Thoughts: - Maybe he feels in…

He did seem way more nervous than usual.

Re: SpaceX: Making Life Multiplanetary [video]

#32
post #18

Back of the envelope calculation for the price of an Earth-to-Earth ticket: Musk's stated goal is $500k/ticket to Mars. It's a shorter trip, so perhaps ~5x as many passengers in the same volume (i.e. 500 total; cf. a380 which seats 850). It takes five (?) orbital refuel trips for the martian journey, but we'd need none of those. Depending on how much less than a full tank the passenger vehicle needs (payload could be…

Elon's stated goal for ticket price to Mars is $200k, not $500k.

Re: SpaceX: Making Life Multiplanetary [video]

#33

Earlier quoted context omitted.

I imagine they can fit 400 passengers though. No need for those cabins or even a need to give passengers drinks.

For 30 minute trips you barely even need toilets.

I'd just shit my pants on liftoff.

Re: SpaceX: Making Life Multiplanetary [video]

#34
post #13

Nothing on Moon Base Alpha except a picture. Would be nice to have a timeline for this (maybe the gap years where Mars transit is too long?)

I get the impression Elon's stance is, "If somebody else wants to build a Moon Base, you're welcome to buy launches from us. Here's how you'd do it." Elon himself pretty much just cares about Mars.

Re: SpaceX: Making Life Multiplanetary [video]

#36
post #18

Back of the envelope calculation for the price of an Earth-to-Earth ticket: Musk's stated goal is $500k/ticket to Mars. It's a shorter trip, so perhaps ~5x as many passengers in the same volume (i.e. 500 total; cf. a380 which seats 850). It takes five (?) orbital refuel trips for the martian journey, but we'd need none of those. Depending on how much less than a full tank the passenger vehicle needs (payload could be…

Ironically, I think SpaceX will have a lot more trouble with any E2E ambitions than they would with missions to Mars. So much red tape, no one's going to want a space-port in their backyard, different/difficult economics, safety concerns, terrorism concerns, etc. etc.

Re: SpaceX: Making Life Multiplanetary [video]

#37

So what's the carbon footprint of one of these launches? Did I understand correctly that we can make the fuel by taking CO2 from the atmosphere? That would make the footprint negative, would it? That seems to good to be true.

Not negative, since you are creating just as much CO2 burning the CH4 as you removed in the first place. Carbon neutral though.

Re: SpaceX: Making Life Multiplanetary [video]

#38

Earlier quoted context omitted.

I was a little disappointed he didn't give any timeline at all on that not even a aspirational one. I also assume it's gonna be really expensive due to frequent heat shield replacement. I wouldn't be surprised if it never became economically viable. Too few passengers and too high cost.

I imagine they can fit 400 passengers though. No need for those cabins or even a need to give passengers drinks.

Actually, an A380 can hold 853, so BFR could probably hold the same.

If he can get the cost down to US $10 million per trip, that's US $12K per person.

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