how will reusable rocket engines work?

Question

https://youtu.be/hdS4azOaF2M?si=MzFLf5LdnbA7VJMD

SpaceX is retrieving boosters and reusing them, pretty clear how they do that. But how will main engines be reusable? How will they retrieve them?

In: 3

Answer 1

On the Space Shuttle Orbiter the main engines ( three Aerojet Rocketdyne RS-25) simply went with the payload into orbit, with most of the craft (the main fuel tank and solid rocket boosters) discarded, but those were designed to be the cheapest parts of the craft.

The engines were serviced and prepared after every flight and operated very well during the space shuttle program.