Fortune telling for rocket launch _ Rocket launch depends on the Gregorian calendar.

The trajectory of rocket launch is a curve from vertical to horizontal, in which the height and speed increase gradually. As long as the engine is finally turned off and reaches the predetermined orbital speed, even if the mass of the whole solar system is used as fuel, the load of 15 tons can only be accelerated to 0. 1% of the speed of light. The exponential rise is very explosive. It is faster than throwing things down from the launch tower. After 150 seconds, the rocket is lightened by more than half, and the engine thrust remains unchanged. At this time, the acceleration can exceed 4g.

Height is relative to the surface, and flying height is a measure used to describe flying objects in the atmosphere. Rockets have long had the ability to get rid of the gravity of the earth and fly out of the atmosphere. The working height of rockets can reach 20 kilometers. Ballistic missiles can reach 1200 km; Due to the thin airflow, the plane can only fly to an altitude of 30 kilometers. First of all, rockets are used to launch loads and will be abandoned after completing their tasks. Therefore, we generally pay more attention to the speed of spacecraft such as satellites flying around the earth.

To launch an earth orbit with a height of 500 kilometers, the orbital speed should reach the first cosmic speed, that is, 7.6 kilometers per second; Geosynchronous orbit satellites will reach 10.25 km per second; Although it is a sounding rocket, its flying height can reach a vast airspace height of 36,000 kilometers. ? The highest point reaches 356,5438+0,000 feet (about 65,438+0,007 kilometers). It is understood that this launch is the eighth launch of the new Shepard series of rockets. Then the rocket engine provides the thrust needed 80 to 120 seconds before flight, and finally glides and lands at a speed of 320 kilometers per hour.

The top speed can be as high as Mach 23. According to the disclosed information, the total length of the rocket will reach 65 meters, and its core components are two liquid propellant tanks and four RS-25 engines. The maximum speed that the terminal can reach is only about 6 kilometers per second, which can't meet the speed requirements of the first universe at all, so this is the reason why multistage rockets were born.