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(The Atlantic)   We would likely need plenty of barf bags if we were to fly from NY to Shanghai in less than an hour on Elon Musk's proposed Earth transport system   ( theatlantic.com) divider line
    More: Interesting, BFR, LIGO, flight attendants, BFR's flight, not-yet-built system-which Musk, giant rocket awaits, founder Elon Musk, rocket travel  
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1524 clicks; posted to Geek » on 04 Oct 2017 at 9:20 AM (9 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



Voting Results (Smartest)
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2017-10-04 09:37:07 AM  
2 votes:
Meh.  I'm waiting for Phoenix to finish this project

images1.phoenixnewtimes.comView Full Size
2017-10-04 09:33:21 AM  
2 votes:
Don't we all just liquefy and then resurrect using the stones implanted in our chests?
2017-10-04 08:39:08 AM  
2 votes:
The Roads must roll.

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2017-10-04 12:33:50 PM  
1 vote:

wildcardjack: Let's skip the logistics of being shipped like a armageddon warhead, and focus on comfort.

[holykaw.alltop.com image 500x350]

For $10k and half a day, would you rather be pampered with the sheiks, or spend about as much time to go on a violent roller coaster with a one in ten chance of blowing up?


Good point, but US->Asia travel times are more in the range of 12 hours in the air, and if you've got connections or layovers it can easily be 20 hours of flying.

If I had a spare $10K laying around I'd actually buy a car instead of going to China.
2017-10-04 11:24:04 AM  
1 vote:
Let's skip the logistics of being shipped like a armageddon warhead, and focus on comfort.

holykaw.alltop.comView Full Size


For $10k and half a day, would you rather be pampered with the sheiks, or spend about as much time to go on a violent roller coaster with a one in ten chance of blowing up?
2017-10-04 11:01:46 AM  
1 vote:

AquaTatanka: I just don't see hypersonic personal Transit as a necessity.  We're rapidly approaching an era in which you can virtually send yourself anywhere.  I can maybe see moving Commodities in this manner for Freight transport but with the safety requirements a human needs I think many people would rather experience the world virtually in the future.  I'm also taking into account the energy expenditure.  Business travel isnt going to require travel in the coming decades.

*crazy thoughts there*


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2017-10-04 10:24:08 AM  
1 vote:

max_pooper: Comic Book Guy: NOLAhd: How do you slow down from 16,700 miles per hour to safe landing speed?

Legit question. I honestly have no idea and I'm curious.

The atmosphere slows you down, and braking rockets take care of the rest.

Yup, this is how the shuttle went from 17,000 mph to 215mph for landing.


It's going to have to be quite a bit different than the shuttle.  BFR is supposed to have "fully reusable heat shield technology", but what he means here is anyone's guess.  No way is he going to put the heat shield on the side of the booster- just too much weight and cost.  BFR is going to have to go through the atmosphere butt first since humans don't deal well with negative g, and I don't see how you flip the thing over from nose-first once in the atmosphere.  It's probably going to be on a retractable shield over the engines, but how that works I have no idea.

My guess is that it will bleed some speed off high up, but most of the braking will be propulsive, just like F9's first stage.

Personally IMHO there's no way this happens, ever.  You're looking at 1100+ tons of propellant+oxidizer for each trip.  Concorde carried 85 tons of fuel, got the oxidizer for free and was still too expensive to run.
 
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