The Ledger
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Rocket engines take three major iterations to become mature products
“And I always said it took three versions of Merlin to get it to be really tight. And it took three versions also of Raptor. I always say it takes really three, three iterations to get to a really, really tight product and Raptor's there.”
Mueller calls 3D printing a "cheat code" for rocket engines
“For rocket engines, it's almost like a cheat code. It's so easy to make a high performance rocket engine with three D printing. Because the rocket injectors and the cooling passages are pretty small and complex. So to make a rocket engine by machining and asse…”