The use the gravity waves or dark matter as a thruster or exhaust gas for rockets are the most exotic and futuristic engines in the series of hypothetical engine concepts, whatever can be imagined.

What if we someday can create a rocket engine, what is turning its exhaust gas into the dark matter? That kind of concept could be fascinating because the dark matter would not be interacting with another type of matter than other dark matter particles. So if the exhaust gas would form of dark matter, the rocket would seem to fly silently without visible exhaust gas through the sky. But the problem is how to form dark matter?

The dark energy could use as a thruster if that thing can be aimed. But there is no person, who even claims to control dark energy. But if dark energy can be aimed someday, that thing can be the ultimate tool for rocketry. The reason, why I believe that dark energy could use as the thruster, is that this force expands the universe. Because it can expand the universe it can move a rocket, but the problem is how to get dark energy for the rocket?

The idea of the use dark energy as the thruster is not so hard to make. The idea is simple, the dark energy interacts with dark matter, and that thing wóud give thrust to rocket. So the dark energy will affect dark matter, which is giving thrust for the spacecraft, but the problem is how to get dark energy for that purpose? There is no single observation about the wave movement, what is the opening road to the size of atoms of dark matter.

Dark Energy or an eerie force that expands the universe could be the endless energy source if that thing would interact with something, what we can handle. The dark energy could be the wave movement, which is causing because the oscillation of the dark matter. The gravity waves could be the key for that question, and if the source of gravity waves would be seen, that thing could open a new page in the research of gravity. But the gravity waves could also be used in a rocket, which uses gravity waves as the thruster.

But before we can create the gravity-wave engine, we must make the conditions, where gravity waves are forming. Are they "only" the waves of the dark matter?

Without knowing what the gravity waves are, and how they are forming is impossible to create a gravity wave engine, which could accelerate the rocket to the speed, which is the same as the speed of light or over it. Or the WARP engine could use gravity waves for sweeping all material away from the nozzle of the rocket. Without knowledge of the born of gravity waves kind of engines are purely hypothetical.

Image:()https://newatlas.com/physics/what-is-dark-energy-explained-accelerating-expansion-universe/