How fast would a spacecraft travel with the emdrive?
The EmDrive, a proposed propulsion system that purportedly uses microwaves for thrust without propellant, has not been demonstrated to work according to the laws of physics as currently understood. If it were to operate effectively, theoretical estimates suggest it could potentially allow spacecraft to achieve speeds significantly higher than conventional chemical propulsion, potentially reaching a fraction of the speed of light over extended periods. However, because the EmDrive remains controversial and unproven, any specific speed predictions remain speculative. Thus, without empirical evidence, it's impossible to provide a definitive answer.