2min chapter

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#356 – Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel

Lex Fridman Podcast

CHAPTER

Is That Really the Ultimate Compromise?

The ultimate metric is how much does one kilogram cost to orbit eventually, you know. How much thrust is it producing versus how much is gravity pulling down on it is actually a more important metric than how raw efficient the engine is. And so I guess another way it's not even just thrust. It's kind of the opposite thrust to weight ratio doesn't really matter. What really matters is the actual the specific impulse is colored like the nozzle escape velocity of the or the injection velocity of the how fast is the gas moving in space.

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