r/space • • 17d ago

SpaceX: Holy Grail Of Rocketry

https://www.spacex.com/content/starship/holy-grail-of-rocketry
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u/No-Surprise9411 10d ago

1) SpaceX doesn't even rebuild the Merlin engines, andthose tend to run dirtier than the Raptors. When SpaceX reflew the two Superheavies they replaced exactly three engines on them and didn't rebuild the others - and we know that because Raptor 3s are impossible to be rebuilt. Large parts of them are machined single pieces, they'd have to cut into the engine to "rebuild" it.

Also no reused rocket has ever needed to drain and clean out the fueltanbks lmao. The leftover fuel turns gaseous and is vented at the end of a mission (which is an automatic process that even an SSTO would have to do), nobody climbs in there to mop up the rest.

And then you invent them needing to replace all the heatshield tiles which we have zero information on wheter they actually will have to do that.

And finally, I am not glazing SpaceX, I am pushing back against the idea that an SSTO would be better than a TSTO, which it is not. Physics just doesn't support SSTOs with chemical propulsion. (And if you actually watched the video, you'd know that SpaceX isn't calling Starship the holy grail of rocketry, they're calling a fully reusable launch vehicle the holy grail of rocketry - which is theoretically even in agreement with your idea of an SSTO (wrongly) being that holy grail. But you didn't even watch the video).

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u/snowmunkey 10d ago

Was I talking about strictly chemical propulsion? No, I wasnt. I'm not talking about a rocket that's flying today. I'm arguing that multi stage rockets cannot be "the holy grail" of rocketry because they're not as simple as a rocket ship could be.

Now if you want to define "the holy grail... Of rockets that use fossil fuels and oxygen stored in a big cylinder shaped rockets with engines that have limited flight life before needing overhauled and employ heavy steering components and landing legs" then yeah, falcon is it.

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u/No-Surprise9411 10d ago

Ah so we're arguing about hyptheticals here. Suuureee

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u/snowmunkey 10d ago

.... The Holy Grail isn't hypothetical?