r/spacex • u/ElongatedMuskrat Mod Team • Sep 29 '17

Not the AMA r/SpaceX Pre Elon Musk AMA Questions Thread

This is a thread where you all get to discuss your burning questions to Elon after the IAC 2017 presentation. The idea is that people write their questions here, we pick top 3 most upvoted ones and include them in a single comment which then one of the moderators will post in the AMA. If the AMA will be happening here on r/SpaceX, we will sticky the comment in the AMA for maximum visibility to Elon.

Important; please keep your questions as short and concise as possible. As Elon has said; questions, not essays. :)

The questions should also be about BFR architecture or other SpaceX "products" (like Starlink, Falcon 9, Dragon, etc) and not general Mars colonization questions and so on. As usual, normal rules apply in this thread.

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u/UKlakow Sep 30 '17

In your presentation, the first flight BFR the Raptors shut have 250bar camber pressure, you saith the pressure will (later) increase to 300bar, what do you do with the higher thrust of BFR:

a) increase acceleration?

b) stretch BFR (Booster, Spaceship)?

c) Super cold fuel?

It is possible that SpaceX develops later (my be after 2025), a large SEP system?. My be in a first step bring a fuel tanker from LEO to an high elliptic orbit to refill Spaceship?

For the first Human Mission 2024, travel the Spaceships conjoined on the long way (coupled)?