Ну, почитайте для общего развития. Речь о скоростях порядка М = 20.
Hypersonic gliders could exploit their kinetic energy in this way if they could keep their speed high enough up to the end of their flights. Diving from a great altitude could help somewhat, but this alone will not provide a lot of additional kinetic energy. This is true in part because as the glider gets closer to the surface of the Earth, the air density quickly rises and the drag on the gliders increases, working against the acceleration provided by gravity. The same kinetic energy effect could more easily be achieved with a ballistic missile re-entry vehicle outfitted with a terminal booster, which would accelerate the warhead down toward its target just before impact (Garwin 2003, 4).
Kinetic energy attack requires great precision, and there is nothing fundamental about a hypersonic vehicle that makes it intrinsically accurate. To fly stably, however, the glider needs some sort of aerodynamic control so that, if it has some sort of guidance as discussed above, it can apply that guidance information to the control system, adjust its course, and home in on a target. Note, however, that high kinetic energy weapons face a conundrum: greatest lethality requires the highest speeds, which will be in the plasma region, making terminal guidance impossible. So there is a tradeoff between accuracy and destructiveness.
