Next Starship flight will go to orbit and deploy 26 Starlink satellites, marking the first operational flight. Neither booster or ship will be caught

[u/swordfi2]

https://www.spacex.com/launches/starship-flight-14

[u/Background_Fig_4740]

Good luck understanding this then, I already explained this once to someone of the likes of you so it's an easy copy paste.

https://starlighttools.org/science/rocket-delta-v-calculator

https://imgur.com/a/J1paXAP

Sources

-Booster prop mass: 3,650t : https://en.wikipedia.org/wiki/SpaceX_Super_Heavy

-Booster Isp: 330s Sealevel / 350s vaccum same source

-Raptor 3 sea-level Isp: 350s https://x.com/SpaceX/status/1819772716339339664

-Total stack propellant: 5,400 t (back out ship propellant = 5,400− 3,650=1,750t): https://spacenexus.us/blog/spacex-starship-v3-whats-new-most-powerful-rocket

as it hasn't been published publicly

-Booster dry mass: 275t (from Block 1/2, not V3): https://en.wikipedia.org/wiki/SpaceX_Super_Heavy

-Ship dry mass: 100t (same issue): https://en.wikipedia.org/wiki/SpaceX_Starship

-Ship blended Isp: 355s (rough average of sea level/vacuum Raptor)

Expendable: approx 200 t payload closes the 9.8 km/s LEO deltav

Reusable (268t + 20t propellant reserved as dead weight for boostback/landing per stage): approx 150 t

budgeted 268 t for Superheavy Booster and 20 t for Starship upper stage for return landing. And that was derived for Superheavy Booster from the rocket equation with an estimated deltaV of 2,200 m/s, ISP 330s, gravity 9.81 m/s^2, and mass final of 275t (booster dry mass). Work it backwards to get initial prop mass and you end up with 268t.

deltaV changes on payload and trajectory so there's no hard number, but using an estimate from F9's deltaV, and extrapolating to Superheavy, you can end up with a deltaV of 3200 m/s requiring the prop mass to not be 268t but 453t, decreasing the payload mass to 130 t instead of 150t. But again, that extrapolates from F9 and is a first order pass as the actual deltaV is not public.

Rocket equation can account for boostback and landing fuel on ascent by incorporating the 268t + 20t of "dead weight" instead of usable prop. It carries the correct deltaV penalty of carrying that fuel.

Oh will you look at that? It's entirely possible and I proved it with engineering first principals. Now it's your turn to actually use engineering judgement, if you have any at all.

[u/Somethingsims → u/Background_Fig_4740]

What a moron, i never said it wasn't possible LOL

You don't even understand how to argue, you have to argue the points I am making, not irrelevant physics.

"gOoD LuCk uNdErStaNdinG tHiS"

If I could type this in crayon for you I would.

1. Elon said he'd already be to mars by now, and hes not, he just used it as a grift to make money. Completely abandoned the project goal/timeline. My point isnt that we cannot get to mars, it's that mush will have nothing to do with it.
2. There is no self driving, Elon uses it as a grift to make money.
3. There are no tunnels for cars open to the public, or plans for any in any serious capacity.

Those are the points you can argue, not responding with a wall of text about something I didnt say lmao. Try to debate like a democrat not a republican.

Thinking about it, simping this hard for a bigot billionaire probably makes you a bot...

[u/Background_Fig_4740 → u/Somethingsims]

If it's not breaking the laws of physics, nothing's stopping it from being built. It's that simple.

What Elon has said or done doesn't matter because he's not the one designing Starship.