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Questions tagged [bfr]

Questions regarding SpaceX's Big Falcon Rocket (BFR)

1
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0answers
95 views

Details about the BFR abort procedures?

What kind of emergency procedures will the BFR have during landings? I can see an abort to an alternate landing zone but what about when you have a an emergency ten seconds after engine shutdown?
2
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0answers
87 views

How much noise would the BFR make at launch?

In addition to multi-planetary travel, SpaceX has plans to use the BFR for intercontinental travel. However, would the sound generated by the BFR's launch disrupt local communities and therefore make ...
14
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3answers
2k views

Will it be possible to see BFR approaching the moon from earth, with naked eye?

The title pretty much sums it up. I'm not old enough to have experienced any of the previous manned moon landings. Given that Big Falcon Rocket will go around the moon in 2023, I'm wondering if one ...
5
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2answers
196 views

Drawbacks and advantages of two slidable & rotatable control surfaces for BFS sized spaceships

BFS (SpaceX's Big Falcon Spaceship) is in development and has seen between 2016 and 2018 three major design modifications. January 2018 I asked here how BFS planned to manoever during aerobraking. ...
11
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2answers
352 views

How does SpaceX plan to deal with boiloff on the trip to Mars?

Both BFR booster and BFS are to run on Raptor engines, fueled with liquid methane and liquid oxygen - cryofuels. The trip to Mars will take at least a couple months, and BFS requires fuel for powered ...
5
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3answers
1k views

Will spacex launch in an inclined fashion while returning from mars?

Considering the toughest thing in launching a rocket is to achieve the tangential velocity, launching horizontally might give us an added advantage for delta V requirement. This can't be done in ...
6
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1answer
284 views

Can BFS land on the Moon?

Can BFS land on the Moon and return? No aerobraking, no ISRU resources to refuel on the surface for return, but much less delta-V than going to Mars. Landing legs are there, though the engines may be ...
5
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3answers
1k views

New BFR Engine arrangement

Watching the announcement at Space X I was confused about the new engine arrangement. All the nozzles look the same size. Is there still a mixture of vacuum engines and sea level engines? Or did they ...
2
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1answer
135 views

How the new BFS is supposed to dock for refuelling?

The previous design iteration of BFS called for flat tails to connect the tanker and the passenger version and facilitate propellant transfer through acceleration. But the new version is depicted to ...
2
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2answers
180 views

Why Spacex Lunar Mission date postponed?

Previously SpaceX Lunar mission date was 2022, but it is mentioned in the wiki that it is no earlier than 2023. Why the date has been postponed?
5
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2answers
715 views

Is SpaceX lunar mission only a flyby mission, or it is going to land on Moon too?

Is SpaceX lunar mission only a flyby mission, or it is going to land on Moon too?
8
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2answers
946 views

BFR ticket cost

Has anyone paid SpaceX for a trip to Mars on the BFR? If so, how much did they pay?
3
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2answers
259 views

SpaceX Lunar Mission when possibly will it take place in future?

As SpaceX has delayed the crewed Lunar Mission which was going to happen in 2018 and now as currently, BFR is in progress, and also as SpaceX has mentioned in the first half of 2019 it will conduct ...
3
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1answer
114 views

Will Falcon 9 block 5 successful launch speed up production of BFR?

I was just wondering that as Spacex has just launched it's final variant of Falcon 9 block 5 successfully, so now will it speed up the process of building BFR rocket ?
5
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1answer
185 views

Silly concept: repurposing BFS into a spin-gravity habitat

The idea is the following: Launch four passanger carrying (but empty) BFS and a fifth, (satellite deploying version) which carries the central hub, outfitted with spin-up engines. Then manouver the ...
33
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2answers
5k views

Can a spaceship land on an icy body using retropropulsion? wouldn't the ice melt?

Can a spaceship, say Musk's BFR, actually land on the ice surface of Titan, or Europa, or Enceladus? It seems to me that the hot exhaust gases would make the surface melt where the rocket is trying ...
16
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2answers
3k views

Why will the BFS reenter broadside rather than engine first?

Musk has stated that they added the delta wing to the BFS design because; from one flight to the next the ship may have differing payloads and differing fuel loads. These changes shift the center of ...
5
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1answer
346 views

Would it be possible for SpaceX's BFR to return the Hubble Space Telescope to Earth in the future? [closed]

Ever since the Space Shuttle retired, there was an unpopular decision to leave the Hubble Space Telescope until it eventually stopped working, since there was going to be no way to return it to Earth. ...
23
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4answers
8k views

Why is SpaceX building the Big Falcon Ship before the Big Falcon Rocket?

I believe that SpaceX is planning on building the BFS (Big Falcon Spacecraft) before the BFR (Big Falcon Rocket), which serves as the first stage for the second-stage BFS. Does anyone know why they ...
6
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1answer
197 views

How will they mitigate the effect microgravity has in the BFR on manned trip to mars?

Very curious to know this, since it doesn't look like the BFR will utilize centrifugal force to emulate gravity as far as I know.
9
votes
1answer
1k views

What are the details of the SSTO Mars profile for the BFR?

In this link and on other occasions, SpaceX has indicated that the BFR would land on Mars, "top off the tanks" as the article says, and then launch back to Martian orbit. SSTO doesn't work on Earth ...
2
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0answers
78 views

Technology to directly observe an exoplanets [closed]

I would like to know what number of space telescopes, ideally mass produced ones using current technology and that could be cheaply manufactured and launched en-mass via the future SpaceX BFR. How ...
17
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3answers
2k views

How many SpaceX Starlink Internet-service satellites could be deployed in a single Falcon 9 launch? Falcon Heavy? BFR?

The mass of the two test satellites being launched this month is 400 kg, but I don't believe that includes the antennae and the structure to hold and release them. Is total mass the only constraint or ...
8
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3answers
1k views

Where will SpaceX build and launch the BFR?

SpaceX are planning a new very heavy launch vehicle called BFR. Although the site of manufacture has not been finalised yet (as far as I know), everyone seems to assume it will be on the east coast. ...
0
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2answers
159 views

Is it viable to use one or more BFR tankers as interplanetary boosters

Is it viable to Start the BFR mars burn while the ship is attached to one or more refueling boosters? (Imagine interplanetary booster) Using their combined engines the ship can achieve greater ...
2
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0answers
311 views

What will the heat shield on the BFS be made of

Musk has stated that the BFS will need a heat shield capable of reentering the atmosphere from interplanetary trajectories. So I take it the ship will come in directly from the transfer trajectory and ...
7
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2answers
942 views

Why is BFR replacing the Falcon 9?

Not every payload (or even batch of payloads) needs super-heavy launch capacity, but that seems to be what SpaceX is doing. https://www.space.com/38323-spacex-phasing-out-rockets-for-mars-bfr-...
2
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2answers
798 views

Will SpaceX use a BFR Heavy mode, similar to the Falcon Heavy but with 3 BFR cores? [closed]

Big Falcon Rocket will need several (maybe 6) tanker missions to get enough fuel for a Mars mission. Does this mean at some point we may witness one BFR Heavy, made of three BFR first stages ...
21
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4answers
5k views

Why 31 engines for the BFR?

I understand the philosophy of using relatively many smaller engines so that a single engine failure has minimal impact on the mission (provided you can keep the shrapnel from shredding the others) ...
5
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2answers
629 views

Capacity of the BFR tanker — how many flights to fully refuel the spaceship?

So, the current plan for the BFR has the spaceship massing 85 tons and carrying 50 tons of cargo plus around 1000 tons of fuel and oxidiser (according to wikipedia), most of which is presumably ...
7
votes
2answers
403 views

How will BFS maneuver during aerobraking?

Pictures of SpaceX's "Big Falcon Spaceship" (BFS) delta wing don't seem to show presence of any aerodynamic control surfaces. How will it's attitude be controlled when encountering the atmosphere? To ...
9
votes
2answers
896 views

Range of BFR as single stage

The depictions of the BFR for earth to earth travel include the 1st stage booster. I would think if you are just going ballistic, the upper stage would have enough delta V to go it alone, for closer ...
3
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0answers
221 views

How long can it be reasonably expected to wait for the first flight of SpaceX's BFR? [closed]

Elon Musk has said that he's planning to launch two uncrewed BFR rockets to Mars by 2022. And of course there would be some test launches even before that. For such an enormous project, I don't see ...
8
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0answers
145 views

What kind of robots will be sent to Mars with the first BFR(s)? [closed]

Elon Musk has recently announced plans to send two unmanned BFRs to Mars in 2022. If the timeline is met, what robots will be sent? As I understand, the tasks will be [...] landing two cargo ...
1
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3answers
369 views

Zero gee rice cooker for BFR's trip around the Moon; how would that work?

Because of where I'm currently living, I've gotten used to using a small rice cooker regularly. @Tristan has pointed out that cooking dried rice, or dried beans in boiling water could not be done in ...