It is known that light photons in a laser can accelerate a spacecraft imparting momentum upon a light sail, here one considers the properties of superluminal nature of light as shown in many experiments, where the momentum of superluminal laser theoretically might accelerate a spacecraft faster than light. Next one considers a patent on time travel creating negative mass, one speculates upon this, with references to experiments that have created negative mass. Then one considers post-selection in relation to set up an experiment that uses 3 quantum states, entangled particles to create a loop in time of a closed time like curve. Then there is presented experiments done, where manipulation of inertia by advanced electromagnetic fields produces thrust, I suggest with this, by feeding advanced energy into such a device to produce thrust through time not space. And lastly there are speculations of time and energy, where energy is considered as a dimension.