A bit of the vimanas nextday. Basic knowledge: vimana – a device moving in space-time, that is a material body having a nonzero body’s momentum (mass x speed). The more body’s momentum, the one for vimana is better. Special theory of relativity shows that there are only two fundamental methods of obtaining a body’s momentum – or increase full energy at constant energy of rest, or reduce constant energy of rest at constant full energy (or increase full energy and reduce energy of rest) . All modern devices (from car to rocket) use only the first method in one form either another. Using the second method is unrealized due to the lack of today appropriate gravitational technology (tale of the theory for the work based on the articles by Dirac, Zwicky, Robles-Perez, Tully et alia … later).
Appendix. Applying the second method gives delicious cookies as hyper fast acceleration or hyper fast braking, practically instantaneous change of direction of movement with the complete absence of overload (the speed of one tenth speed of light can be achieved in less than a minute), almost complete protection
against dust and micrometeorites. Disadvantages – no relativistic time-reduction.
Perfect device for sub lightning flying/displacements inside the star (sol) systems