Peter Beck

@Peter_J_Beck · Jun 15, 2020

Also somewhat dependent on injector strategy and mixing efficiency. L* ( characteristic chamber length) determines residence time and you only want this as long as it needs to be to react the propellants.

Elon Musk

@elonmusk

Yeah. Merlin, using a single pintle injector with cold, liquid propellant, needs a longer chamber than Raptor, which uses a large number of coaxial injectors, despite Merlin being less than half thrust. Propellant enters Raptor chamber as hot gas that’s already mixed.

09:56 PM · June 15, 2020 · 0 views

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