Black Hole Propulsion as Technosignature

Re:Black Hole Propulsion as Technosignature by JumpCrisscross on Thursday March 07, 2019 @04:10PM (#19332479)

> No fuel is spent aboard the spacecraft which, using stored energy from the beam, continues to accelerate up to terminal velocity

Wouldn't fuel need to be expended on the ship to generate the beam? Or is the beam reflected back to the black hole for re-energisation?

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Re:Black Hole Propulsion as Technosignature by MuncleUscles on Friday March 08, 2019 @12:13PM (#19339529)

You reabsorb the beam which now has even more energy because it's been blue-shifted, which means you can actually charge your batteries as well as accelerate.

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Re:Black Hole Propulsion as Technosignature by jacobush on Friday March 08, 2019 @04:27AM (#19336212)

A mirror should do it.

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