When the audience heard the last sentence "ignition" from the live broadcast screen, the screen immediately switched to the launch site and felt instantly excited, as if experiencing a solemn ceremony.

And this is the meaning of the existence of the ignition password. If the audience has this feeling, it means that the purpose has been achieved.

A popular science point is that the ignition password has no technical function, it is purely to create the atmosphere and increase the sense of ritual. Whether it is the traditional rocket launch or the current "Yuntian-1" launch test flight, it is the same.

In general running competitions, countdown passwords are countdown passwords so that athletes can be prepared to run out as soon as possible, while the countdown password for "Yuntian 1" here has no technical effect.

The relevant staff shouted the countdown to 10~1 ignition. If you look at it according to the general inertial thinking, if the last voice falls, "Yuntian No. 1" rushed straight into the sky like an arrow leaving the string.

The actual situation at this moment is that after the staff said that the fire was lit, "Yuntian 1" was still there, and waited for a while before taking off the ground.

This countdown password is meaningless in its technical role. The countdown here is when the engine is operating, a process is required to establish thrust. The thrust needs to exceed the overall weight of the Yuntian-1 aircraft and reach a certain level before it can take off and take off smoothly.

That's why the ignition command appears, and it still takes a certain amount of time to take off. During this period, manual labor cannot be controlled, and even the astronauts in "Yuntian 1" do not have the right to control the aircraft now.

It also means that it cannot be predicted before takeoff, and the ignition time can only be counted down and then the takeoff time is measured.

Although the countdown is a little hot, "Yuntian 1" does not work with human commands. The so-called countdown and pressing buttons are all fancy. Whether it is a traditional rocket or the current "Yuntian 1" ignition or electric thrust engine startup is fully automatic, rather than operated by humans, and time records can be seen from the measurement and control system.

The reason I read it is to increase the sense of ritual and atmosphere rendering, and use manual countdown to cater to the ignition engine startup process.

After all, AI is more accurate than artificial. If manual ignition is really used, there may be many problems caused by time errors. Therefore, as long as the rocket launch countdown password can increase the sense of ritual and make the viewer excited, its mission will be achieved.

"take off!"

"take off."

The launching platform has contacts. At this time, "Yuntian 1" is slowly taking off, and it has displacement, which is immediately turned on, and then the precise takeoff time is immediately input to the measurement and control system.

"T zero, zero five zero, four three zero milliseconds..."

In the live broadcast screen, the broadcaster followed up and reported the takeoff time, which was several hours, minutes, and milliseconds. However, the audience was paying more attention to another very "abnormal" news. There was no smoke everywhere in the sky when "Yuntian-1" took off, and this detail also shocked some foreign aerospace agencies and astronauts.

What does this mean?

This shows that the engine and energy supply system of "Yuntian 1" are definitely not chemical fuels, and this sentence is very important news.

The careful audience also discovered it and immediately recalled the scene where the host asked the relevant questions before, and both experts kept silent.

Anyway, no matter how many netizens are, they only know that this unusual scene is very awesome.

At the same time, major monitoring stations have successively received live monitoring information and sent it back to Huasheng Space Flight Control Center. The greatest significance of the test flight is to collect data for easy analysis and ensure future flight safety.

At the Huasheng Technology Space Flight Control Center, Li Chuan, as an outsider, was also quietly watching the whole process in the control center. The 127 staff members at the scene were working nervously, and the voices of the broadcaster kept ringing throughout the hall:

"Program turns!"

The control center resounded through this broadcast command that "Yuntian-1" has taken off for more than ten seconds, and the plane takes off perpendicular to the ground. During the flight, its own flight direction and angle must be adjusted. In the end, the attitude of "Yuntian-1" will also be close to parallel to the ground, so that it can accurately enter the orbit around the earth.

This is called "procedural turn", which is actually just a confirmation password, which means "Yuntian 1" is safe and controllable to fly on the correct channel.

"Target capture in both directions!"

The announcer once again reported the exit order to resound throughout the hall. The outdoor measurement and control station is constantly transmitting signals to the transport aircraft. If "Yuntian 1" is in the measurement and control area, it can be detected. At the same time, the satellite can transmit signals to the ground measurement and control station and receive them by the station. This information transmission state is bidirectional capture.

"USB radar tracking is normal!"

When the broadcaster read this sentence, the audience who was watching the live broadcast was silly, such as "the mouse USB is running normally", "the WIFI signal is normal", and "the USB charging is normal" and other strange barrages came out.

However, it is not unaware of it. Some "gods" have started to popularize the science. The correct solution to USB here is not the USB interface on the computer, but the abbreviation of the unified S-band (Unified-S-Band).

“The telemetry signal is normal.”

The fundamental purpose of the test flight is to collect actual data in the future. In order to ensure the normal takeoff process of "Yuntian 1", it is necessary to monitor the working status of each key component of "Yuntian 1" in real time during the flight. Telemetry technology is a technical means to measure the parameters of the measured object at a distance, and is carried out through the telemetry system.

There is actually a double guarantee here, because "Yuntian 1" is an aerospace plane rather than a rocket. For specific flight data, there is a black box inside the aircraft, and at this time the astronaut Wu Zhen was recording and collecting all the live data.

In theory, this is enough.

But if you are not afraid of ten thousand, just be afraid of one. If something happens, it will basically be destroyed and the plane will be killed, and nothing will be left behind. Without real-time telemetry and real-time monitoring, wouldn’t the astronauts be sacrificed in vain?

Therefore, space activities are a very risky activity, especially for test pilots, which requires a lot of courage. Wang Xueyan and three other test pilots actually took off after they had written their wills.

"Optical radar tracking is normal!"

The equipment used for optical tracking is an optoelectronic theodolite. The photoelectric theodolite tracks the target by dependent on the theodolite frame. The radar tracking principle can be said to be a glimpse through the tube. The thinner the tube, the more accurate the target data is, the more refined the obtained target data.

At this moment, "Yuntian 1" has flew out of the atmosphere. The fuselage fairing is used to protect the aircraft from rectifying and insulating when flying in the atmosphere. If the rocket rushes out of the atmosphere, there will be no air friction and there will be no need for fairing and heat insulation. In order to reduce weight, the fairing will be thrown away.

But it is not possible here in "Yuntian 1". The fairing and the body are integrated, and "Yuntian 1" relies on the reversal energy core to supply energy, and the power energy is rich and abundant.

Moreover, the "Yuntian No. 1" that has entered the outer space has no sun windsurfing plates, no separation of machine arrows, separation of machine arrows, etc.

If a rocket is flying, there are usually boosters separation, first- and second-stage separation, and multiple stages of rockets; the booster stage is separated from the rocket; the payload fairing is separated from the rocket, first- and second-stage separation, the payload (satellite, warhead) is separated from the rocket (missile); the tail cover is separated from the missile during cold launch, and many other complex procedures.

These complex programs are gone in "Yuntian 1". They are all in space and then return to the ground as a whole. However, this does not mean that "Yuntian 1" has low technical content, just the opposite.

“Accurately enter the track!”

While the control center resounded through this command, the "Yuntian-1" in space successfully flew according to the pre-designed orbit, that is, it entered orbit accurately. If the aircraft deviates from the pre-designed orbit after entering space, the ground measurement and control station may not be able to communicate with it normally. If it is a rocket, it can only leave the will, which basically means the launch failure.

If such a bad thing really happens, it is not impossible to go back to "Yuntian 1". The pilots on the plane can urgently control the plane and recalculate the new channel and complete calibration before re-orbiting.

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Chapter completed!