Mutually-Repulsing Rockets
Make objects push against each other to opposite directions, and avoid the tyranny of the rocket equation.
Traditional rockets work by expelling mass at high velocity, which is scattered into space. What if we could avoid scattering?
To avoid the scattering, take two non-overlapping beams of collimated particles or light that shines into black-box-like setup inside another of them, and use the collected energy to power the collimated particles projector back to the source.
The idea is that the process set up this way would accumulate the intensity of particle beam as we add more energy, in a way similar to how would how wave interference creates increasingly stronger standing waves between two surfaces, creating increasing pressure as we do not let the energy scatter.
This would mean that the rocket pair would avoid having to be subject to the tyranny of the rocket equation.
Credits: Mindey of HalfBakery.
