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SpaceX Starship Is Bigger and Cheaper Than the External Shuttle Tank

The SpaceX Starship will have six Raptor engines but will still be larger and cheaper than the external fuel tanks of the Space Shuttle. Elon Musk has a goal of building Starships for $5 million. Elon Musk has indicated that one of the reasons for switching to stainless steel for the SpaceX Super Heavy Starship was to use $3 per kilogram of steel instead of $200 per kilogram for carbon composite. SpaceX will save $10-24 million on cost of materials. If the Raptor and Merlin engines had similar cost then each Starship upper stage should be about half of the

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