Recent comments in /f/space

RobDickinson t1_j8l6sdz wrote

Space isnt empty. But what it has is quite .. spaced out...

So it depends how fast you are going how worried you need to be.

The space station gets hit by micrometeorites, no reason why Voyager or a ship cant.

We've no idea how a deflector shield would work.

So we'll be looking at armor/shielding and self sealing, plus potentially lasers to pew pew small particles out of the way, if we can detect them.

Scifi has some cool things including large ships that use a whole bunch of ice on the front to absorb the damage

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Synaptic-Sugar t1_j8k6t8q wrote

I'm sorry but that title gets my mind going, on what else they could've done with the title...

"SpaceX Starship prototype flaunts its bare voluptuous curves on its way to test site"

"Geez, this is a public space, please put some tiles on!" (Actually not really kinda but shush :P)

"Boca Chica now confirmed a nude beach"

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RusticMachine t1_j8ixtpl wrote

> The key clue is it’s moved to the suborbital launch pad. This means it can launch without the SuperHeavy booster.

I think you’re confused. SpaceX has been testing all their Starship prototypes on the suborbital launch pad (e.g. cryo testing, static fires, etc.). This is not an indication it will launch from that platform.

Fyi, Starship by itself, even in an expandable configuration, cannot reach orbit. It needs SuperHeavy even if it were empty (also, the additional 3 engines are vacuum optimized and are only meant to be started at a higher altitude).

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RGregoryClark OP t1_j8iddqh wrote

The key clue is it’s moved to the suborbital launch pad. This means it can launch without the SuperHeavy booster. With 6 engines it can launch fully fueled unlike the previous Starship test flights meant just to test landing.
The key question: what is the dry mass of this expendable version without flaps, legs, heat shield, or ballast tanks? If you know that you can calculate how much payload it can lift to orbit in a single stage.

Elon said the expendable version with only 3 engines might mass only 40 tons:

https://twitter.com/elonmusk/status/1111798912141017089?s=61&t=A46qVnS2GH4VVA-pQSUlkg

Add another 5 tons for 3 more engines and this version might mass 45 tons. However, the increased thrust may require strengthening of the tanks which would increase the dry mass. On the other hand, this version would have to support far less payload atop it then the max 250 tons of the full two-stage so would need reduced tank strengthening.

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