"Wait!"

Jinling University.

Because Jinling was not within the range of the lift-off route, Shao Kaiwang did not prepare a space telescope this time, but got together with Wu Ande, Lin Qian and several others to watch the live broadcast.

When he saw that Chen Yi started to accelerate with all his strength, and the tail flame of the moon landing drone skyrocketed and lengthened several times, Shao Kaiwang subconsciously looked at the display speed and atmospheric pressure altitude of the avionics interface.

It doesn't matter.

When he saw the rapidly soaring speed value, Shao Kaiwang immediately noticed that something was wrong.

"The number of Mach rings of this tail flame is not right with the speed!" Shao Kaiwang shouted.

"It's really not right, there are too many Mach rings."

Lin Qian roughly counted the number of Mach rings, and then compared the speed and speed of the drone to determine Shao Kaiwang's opinion.

Mach ring, this is a bright and dazzling halo formed by jet engines, rocket engines, ramjet engines, etc. working in the atmosphere, and forming a bright and dazzling aura in the exhaust gas.

Description of the professional point.

The Mach ring is a standing wave phenomenon formed by the mutual interference of compression wave and expansion wave in the supersonic exhaust of the engine.

The air inside the supersonic engine will form a low-pressure and high-speed exhaust gas, or tail flame, after work is done, which is sprayed out from the engine nozzle.

Because the pressure of the exhaust gas is lower than the external atmospheric pressure, it is compressed by the surrounding air after leaving the vent.

When compressed to a certain extent, the exhaust gas will re-expand, and after expansion, it will be compressed by the ambient air.

In this process of reciprocating expansion and compression, supersonic exhaust gases generate a series of complex shock waves.

For example, Plante-Meyer expansion waves, Plante-Meyer compression waves, oblique shock waves, positive shock waves, and so on.

These complex shock waves cause the temperature at the junction of exhaust gas expansion and compression to rise sharply, igniting the residual fuel of the exhaust gas, forming a ring of obvious halos.

These halos are the circles of Mach rings that you usually see in the tail flame of the engine.

According to the principle of the formation of Mach rings, it is not difficult to guess.

The number of Mach rings is related to the speed of the aircraft, as well as the ratio of the pressure of the jet to the atmospheric pressure of the surrounding environment.

Some professionals can roughly calculate the efficiency and specific impulse of the engine by the atmospheric altitude and speed of the aircraft, as well as the number of Mach rings of the tail flame.

Now, the number of Mach rings in the tail flame of the lunar drone is obviously inconsistent with the current speed and altitude of the drone.

If you calculate backwards according to the number of Mach rings.

The efficiency and specific impulse of this moon drone engine will surpass that of any current jet engine.

Even beyond the limits of the efficiency of current jet ramjet and rocket engine theories.

"The engine of this moon drone is wrong."

Shao Kaiwang pressed the screenshot, zoomed in on the image of the drone engine vent, and found the shooting picture before Chen Yi accelerated with all his might, before the tail flame skyrocketed.

After careful comparison, Shao Kaiwang confirmed.

The engine used by this moon drone is not right.

Not any of the current common turbojet ramjet and rocket engines.

In the engine vent of the lunar drone, a black cone protrudes from it.

"This ......"

At this time, Lin Weijie seemed to think of something, and pointed to the small conebrae protruding from the nozzle of the moon landing drone engine: "It should be a rotating detonation engine, right?" ”

Rotating detonation engines?

All the people looked stunned, and then they reacted at once.

This engine structure, with a protruding cone, is indeed the nozzle structure of a rotating detonation engine.

"It's true that the spout structure of a rotary detonation engine, but isn't this engine still in the laboratory stage?"

Wu Ande spat: "Why did Yifei come up with mass-produced products and create drones?" ”

"Want Wang, where are you looking for the Immortal UP Master?"

Lin Qian looked at the live broadcast screen, listened to Chen Yi's voice explaining while controlling the drone, and said incredulously: "No wonder, he dared to say that he landed on the moon with a drone." ”

"I don't know, I've watched all his videos before, and I can't see it so powerful at all."

"We're still not sure if it's really a spinning detonation engine, and it's useless to speculate."

Shao Kaiwang was also a little puzzled.

As he spoke, he turned on his prestige and intercepted a video of the lunar drone taking off, along with the screenshots just now and the speculations of several people, and sent it to his mentor, an academician and professor who is unparalleled in the country.

"Teacher, I found a video of a test flight of an aircraft, and the engine used is suspected to be a rotary detonation engine, can you take a look?"

The message was sent in less than ten seconds.

A phone call with no number showing and apparently confidential came.

Looking at this call, Shao Kaiwang suddenly felt a little numb in his scalp and reached out to answer the phone.

"Hey, hello......"

"Which lab did you leak this confidential video from?"

"Where are you now, don't show the video to anyone else, I'll go over immediately!"

On the other side of the phone, a series of eager but familiar inquiries rang.

Hearing this voice, Shao Kaiwang suddenly relaxed, and hurriedly replied: "Teacher, it's not a laboratory, it's a live broadcast, this is a live video, it's the live broadcast of the winged UP master I showed you a few days ago!" ”

"Live?" The professor didn't react for a moment.

"That's right, it's a live broadcast, this up master said that he wants to broadcast the drone to the moon live!"

Shao Kaiwang glanced at the live broadcast and hurriedly explained to the professor: "Now the drone has flown to the middle layer and is in the parabolic acceleration stage...... I'll send you the link to the live stream! ”

Shao Kaiwang said, walking quickly to the computer.

Open the live sharing option in the upper right corner, send the link to the live broadcast room to your mobile phone, and then send it to the professor.

When Shao Kaiwang sent the link to the professor.

In the live broadcast screen, the moon landing drone has been rising.

The fuselage also suddenly began to translate, from the ascent phase to the parabolic detachment phase.

"Accelerate, accelerate!"

"Parabolic glide acceleration, accelerate with the help of the planet's rotation, and get rid of the planet in one fell swoop!"

"This drone is so strong, now the speed has exceeded Mach 16, more than 5.4 kilometers per second, and only one-third of the fuel is consumed."

"This time it can be so strong, mainly because it flies strictly in accordance with the space lift-off trajectory, last time?

The last time the anchor was Xia Jiba flying around, and he didn't understand anything.

I haven't seen anything vertical in space.

The focus of aerospace is speed, not altitude, and the optimal solution is to accelerate strictly with the help of the planet's rotation and parabolic principle, rather than blindly rushing to altitude. ”

"Brother Xia Jiba flying around, there's no need to mock like this.

The anchor can play drone landing on the moon, do you think he will not understand it last time?

It can only be said that the purpose of the two live flights is different.

The last time was a sprint into space, and the emphasis was on momentum and indomitable.

This is the moon landing, focusing on energy efficiency and accelerating in a roundabout way.

The one who says that the anchor doesn't understand, you really don't understand. ”

"I'm not mocking, I'm just sorry.

If you could fly according to the space trajectory last time, you would not be unable to enter the first cosmic velocity, and you can only crash at high altitude. ”

When Shao Kaiwang shared the link to the live broadcast to the professor.

Netizens in the live broadcast room saw that the lunar drone had entered the stage of parabolic detachment and was accelerating to get rid of the centripetal force of the planet, which also published barrages.

Some of these netizens even sprinted into space because of the last live broadcast, Chen Yi's Xia Jiba flew around and caused a controversy.

"Okay, don't make any noise, it's all here to see the anchor's drone landing on the moon, what's so noisy."

"Now that the drone has entered the sky over Fuhai, what about our observation team in Fuhai? Cheer out there! ”

"Hurrah here! The Fuhai Xia tracking team successfully locked the target, the drone flight is normal, the tracking shooting is normal, and the remote sensing signal is normal! ”

Several netizens with Fuhai Xiamen ID sent out a series of tracking images.

In the image, indigo blue with a hint of purple sky background, dotted with stars, a comet-like light and shadow is advancing.

After the image is magnified, you can clearly see the figure of a drone, spraying tail flames, draped in starlight, running into the distance.

"What about the bay? Where is the hilltop team in the bay?! ”

"The team at the top of the mountain in the bay, after feeding 180 mountain mosquitoes, successfully locked the target, the drone flew normally, the tracking and shooting were normal, and the remote sensing signal was normal!"

The summit team in the bay waited for a few minutes, sending out a flurry of tracking images.

As the altitude increases, the background of the image has changed from indigo to purple, indicating that the drone has entered the thermosphere of the atmosphere.

"Bay North! What is the situation in Bay North? ”

"Everything is normal in the north of the bay, the target is successfully locked, the flight of the drone is normal, the tracking and shooting is normal, and the remote sensing signal is normal!"

"As the last stop of this lunar drone netizen tracking remote sensing, Wanbei University will continue to track the target until the target surpasses the first speed of the universe and enters the orbit around the planet!"

"Wanbei is good!"

"Compatriots on both sides of the strait are one family! Attaboy! ”

In the live broadcast room, with the continuous tracking is normal, the remote sensing signal is normal.

A group of netizens and university clubs who participated in tracking remote sensing couldn't help but cheer and celebrate at this moment.

After the first two live broadcasts, they have been impressed by Yifei's drone technology and Chen Yi's technology.

This time the drone landed on the moon, when other netizens were still doubting and shouting.

They have already prepared the shooting equipment, and in just two hours they have completed the installation of the shooting equipment, the positioning of the shooting angle, the calculation of the route, the planning of tracking remote sensing, and so on.

"6.85 km/s, acceleration of 10.9 m/s, expected to enter the first speed ...... in three minutes"

Ignoring the barrage and the cheers and celebrations of netizens, Chen Yi's mind was all focused on the monitoring screen in front of him, and his attention was always paying attention to the high-speed parameters, speed parameters, angle parameters and so on of the drone.

"Entering the sky over the Pacific Ocean, the signal of the control antenna is about to be obscured by the curve of the earth."

After waiting for a while, Chen Yi looked at the control antenna that was aimed at the east and almost placed at the lowest angle of the level, and without hesitation, he waved his hand to Qin Xiaoyu.

"The drone lifts off, 800 meters in height, at an angle of 60, and accelerates to the east at supersonic speed......"