Just a causal reminder that solar sails, beamed propulsion, mag sails, photon rockets, etc are all examples of propulsion methods free from the tyranny of the r

Just a causal reminder that solar sails, beamed propulsion, mag sails, photon rockets, etc are all examples of propulsion methods free from the tyranny of the rocket equation which require no onboard reaction mass. There is really no need for exotic physics if that's all you're looking to accomplish.