Everyday Astronaut
@Erdayastronaut · Sep 5, 2020
Why don’t more sea level engines utilize the RS-25’s slightly curved in nozzle design that allows for a really high expansion ratio at sea level? This RapVac almost has that similar shape, but it’s curious it’s not employed more often.
Elon Musk
@elonmusk
We’re pretty close to the manufacturing size limit for a milled copper & steel jacket nozzle. Lot of complexity to add a nozzle extension to a sea level engine for small gain. Also hard to fit bigger engine nozzles on the booster.
12:40 AM · September 9, 2020 · 0 views
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