Chang'e-6 returned to Earth with a very strange trajectory, like a hypersonic missile.
This time, Chang'e-6 returned to Earth completely in accordance with the "Qian Xuesen-Sanger ballistic" and carried out space "water drifting", and it was two re-entry into the atmosphere, and two "water drifting".
The scientific name of this "drifting" orbit is the landing technology of "Earth-Moon free return orbit". The re-entry capsule re-enters the atmosphere for the first time at a great distance from the landing zone, and then is "catapulted" back into space by the upper atmosphere, and finally re-enters the atmosphere and slows down to a normal landing.
It is approximately equivalent to a "water drift penetration" of the waverider hypersonic warhead of an ICBM.
The orbiter and return capsule of Chang'e-6 are bound to return to the earth at a distance of 5,000 kilometers above the South Atlantic Ocean, which is equivalent to inputting aiming data into an intercontinental missile in space, and then the orbiter and the return capsule are unlocked and separated, which is equivalent to the release of the warhead of an ICBM with a split multiple warhead, and the return capsule falls ballistically at a high speed close to the second cosmic speed (11.2 km/s), and enters the earth's atmosphere at an altitude of 120 kilometers above the ground for the first aerodynamic deceleration.
After the first pneumatic deceleration, the return capsule descends to a predetermined altitude, then turns over to adjust the aerodynamic attitude, turns around and jumps up the atmosphere again under the pneumatic action, and turns to descend high after reaching a certain high point, enters the atmosphere for the second time, and implements the second aerodynamic deceleration.
The whole set of Chang'e-6 maneuvers is like two "hits", also known as the "semi-ballistic jump return" technique. Currently, this technology is used in the penetration of state-of-the-art intercontinental ballistic missiles and hypersonic weapons. If Chang'e-6's return capsule is equipped with a nuclear warhead, it will be an intercontinental ballistic missile with advanced penetration capabilities of wave-riding hypersonic warheads.
Everyone still remembers the Dongfeng-17 hypersonic missile, which uses the "water drifting" technology to continuously "fight water drifting" at the edge of the atmosphere at hypersonic speed, so that a strong enemy cannot be guarded.
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