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posted by martyb on Saturday September 15 2018, @03:49AM   Printer-friendly
from the queue-up-some-Pink-Floyd-for-the-journey dept.

After a previously planned flight around the Moon using a Falcon Heavy fizzled out, SpaceX has announced that it will send a private passenger around the Moon using a BFR launch vehicle. More details will be announced on Monday:

On Thursday evening, without any advance notice, SpaceX tweeted that is had signed the world's "first private passenger to fly around the Moon aboard our BFR launch vehicle." Moreover, the company promised to reveal "who's flying and why" on Monday, September 17. The announcement will take place at the company's headquarters in Hawthorne, Calif.

There were only two other clues—tweets from Elon Musk himself. Was the rendering of the Big Falcon Spaceship in SpaceX's tweet new? Yes, Musk said. And was he the passenger? In response to this, the founder of SpaceX simply tweeted a Japanese flag emoji. This would seem to be a strong clue that the passenger is from Japan. Or maybe Musk was enjoying the epic Seven Samurai movie at that moment.

By announcing this on Thursday, and waiting four days to provide more details, the company has set off a big guessing game as to who will fly. Of course that is an interesting question, but we have many other questions that we'd like to see answered before that. We've included some of those questions below, along with some wild and (slightly) informed guesses. Musk even answered one of them for us.

The design of the BFS has apparently changed to include three prominent fins and an underside heat shield.

Related: How to Get Back to the Moon in 4 Years, Permanently
SpaceX to Launch Five Times in April, Test BFR by 2019
SpaceX to Begin BFR Production at the Port of Los Angeles
2020s to Become the Decade of Lunar Re-Exploration


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  • (Score: 0) by Anonymous Coward on Saturday September 15 2018, @05:40PM

    by Anonymous Coward on Saturday September 15 2018, @05:40PM (#735349)

    every description of rocket bell dynamics I've heard operates on the assumption that the bell is behind the rocket

    I assume actual rocket scientists look into it with more detail, but the undergraduate-/hobbyist-level studies I've seen don't consider aerodynamics either way -- in that way, they're only directly applicable to a test-stand firing, or to a first stage at the moment of liftoff. These simple analyses would be wrong in both directions, given any significant airspeed -- the lower pressure behind a 2nd stage would make a vacuum engine suitable earlier during launch than one would expect just from altitude, while as you say much of a tail-first landing trajectory would be over-pressure for even sea-level engines.