"etc!"
Jinling University.
Because Jinling is not within the range of the launch route, Shao Kaiwang did not prepare a space telescope this time, but gathered with Wu Ande, Lin Qian and others to watch the live broadcast.
When he saw Chen Yi starting to accelerate with all his strength and the tail flame of the moon landing drone soaring and lengthening several times, Shao Kaiwang subconsciously looked at the displayed speed and atmospheric pressure altitude on the avionics interface.
It doesn't matter if you look at it.
When he saw the rapidly soaring speed, Shao Kaiwang immediately noticed something was wrong.
"The number and speed of the Mach rings on this tail flame are wrong!" Shao Kaiwang shouted.
"That's indeed wrong. There are too many Mach rings."
Lin Qian roughly counted the number of Mach rings, and then compared the speed and high speed of the drone to confirm Shao Kaiwang's opinion.
Mach ring is a bright and dazzling halo formed in the exhaust gas emitted by jet engines, rocket engines, ramjets, etc. when they work in the atmosphere.
Professional point description.
The Mach ring is a standing wave phenomenon formed by the mutual interference of compression waves and expansion waves in the supersonic exhaust of an engine.
The air inside the supersonic engine will form low-pressure, high-speed exhaust gas, or tail flame, after doing work, which will be ejected from the engine nozzle.
Because the pressure of the exhaust gas is lower than the external atmospheric pressure, it will be compressed by the surrounding air after leaving the nozzle.
When compressed to a certain extent, the exhaust gas will expand again. After expansion, it will be compressed by the ambient air.
During this process of reciprocating expansion and compression, the supersonic exhaust gas will generate a series of complex shock waves.
For example, Prandtl-Meyer expansion waves, Prandtl-Meier compression waves, oblique shock waves, normal shock waves, etc.
These complex shock waves will cause the temperature at the junction of expansion and compression of the exhaust gas to rise sharply, ignite the fuel remaining in the exhaust gas, and form obvious circles of halo.
These halos are the circles of Mach rings usually seen in the engine's exhaust flames.
According to the formation principle of Mach ring, it is not difficult to guess.
The number of Mach rings is related to the speed of the aircraft and the ratio of the jet pressure to the surrounding atmospheric pressure.
Some professionals can roughly calculate the efficiency and specific impulse of the engine through the aircraft's atmospheric pressure altitude, speed, and the number of Mach rings in the tail flame.
But now, the number of Mach rings in the tail flame of the lunar landing drone is obviously inconsistent with the current speed and altitude of the drone.
If calculated backward based on this number of Mach rings.
The efficiency and specific impulse of this lunar drone engine will surpass any current jet engine.
It even exceeds the efficiency limits of current jet ramjet and rocket engine theories.
"There's something wrong with the engine on this lunar drone."
Shao Kaiwang clicked on the screenshot, zoomed in on the image of the drone's engine nozzle, and found the shot taken before Chen Yi accelerated at full speed and before the tail flames surged.
After careful comparison, Shao Kaiwang was determined.
There's something wrong with the engine used in this moon landing drone.
It is not any of the current common turbojet ramjet engines and rocket engines.
A black cone clearly protruded from the engine nozzle of the lunar landing drone.
"this......"
At this time, Lin Weijie seemed to have thought of something and pointed to the small cone protruding from the engine nozzle of the moon landing drone: "It should be a rotating detonation engine, right?"
Rotating detonation engine?
Everyone's expressions were startled, and then they all came to their senses.
This engine structure with a cone protruding from it is indeed the nozzle structure of the rotating detonation engine.
"It is indeed the nozzle structure of a rotating detonation engine, but isn't this engine still in the laboratory stage?"
Wu Ande followed his saliva and said: "Why did Yifei come up with mass-produced products and build drones?"
"Wangwang, where did you find the fairy UP master?"
Lin Qian watched the live broadcast and listened to Chen Yi's voice explaining while controlling the drone. She admired and said in disbelief: "No wonder he dared to talk about landing on the moon with just one drone."
"I don't know either. I've watched his videos before, but I can't tell how powerful he is."
"We are still not sure whether this is really a rotating detonation engine. It is useless to speculate."
Shao Kaiwang was also a little puzzled.
As he spoke, he opened his prestige, intercepted a video of the moon landing drone taking off, and sent it to his mentor, an academician professor with unparalleled status, along with the screenshot and several people's guesses.
"Teacher, I found a video of a test flight of an aircraft. The engine used is suspected to be a rotating detonation engine. Please see if it is correct."
The message was sent in less than ten seconds.
A phone call came through with no number displayed and was obviously confidential.
Looking at the phone call, Shao Kaiwang suddenly felt numb and reached out to answer the phone.
"Hello......"
"Which laboratory did you leak this confidential video from?"
"Where are you now? Don't show the video to others. I'll be there immediately!"
On the other side of the phone, a series of urgent but familiar inquiries rang out.
Hearing this voice, Shao Kaiwang relaxed suddenly and hurriedly replied: "Teacher, it's not a laboratory, it's a live broadcast. This is a live video, the live broadcast of the Yifei UP owner I showed you a few days ago!"
"Live broadcast?" The professor didn't respond at once.
"Yes, it's a live broadcast. This up owner said he would live broadcast the drone landing on the moon!"
Shao Kaiwang glanced at the live broadcast and hurriedly explained to the professor: "Now the drone has flown to the middle level and is in the parabolic acceleration and detachment stage... I will send you the live broadcast link!"
Shao Kaiwang said and walked quickly to the computer.
Open the live broadcast 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, the moon landing drone is always rising.
The fuselage also suddenly began to translate, from the ascending stage to the parabolic breakaway stage.
"Speed up, speed up!"
"Parabolic gliding acceleration, using the planet's rotation to accelerate, get rid of the planet in one fell swoop!"
"This drone is so powerful. The speed has now exceeded Mach 16, exceeding 5.4 kilometers per second, and only consumed one-third of the fuel."
"The main reason why we are so strong this time is that we strictly follow the space launch trajectory. Last time?
The last time the anchor was Xia Jiba, he was flying around and didn't understand anything.
I’ve never seen one go vertically into space.
The focus of spaceflight is speed, not height. The best solution is to strictly rely on the rotation of the planet and the parabolic principle to accelerate, rather than blindly rush to height. "
"Brothers who say that Shakiba is flying around, there is no need to ridicule him like this.
The anchor can fly a drone to the moon. Do you think he understood it better than you last time?
It can only be said that the purposes of the two live broadcast flights are different.
The last time I was sprinting into space, the emphasis was on momentum and moving forward inexorably.
This time it was a moon landing, and the emphasis was on energy efficiency and roundabout acceleration.
Anyone who says the anchor doesn’t understand, you really don’t understand. "
“I’m not mocking, I’m just pity.
If it could fly according to the space trajectory last time, it would not be unable to enter the first cosmic speed and could only crash at high altitude. "
When Shao Kaiwang shared the live broadcast link with the professor.
Netizens in the live broadcast room also posted comments after seeing that the moon landing drone had entered the parabolic separation stage and was accelerating away from the planet's centripetal force.
Some netizens even got into a controversy because Chen Yi's Xia Jiba flew around in the last live broadcast of sprinting into space.
"Okay, stop arguing. We're all here to watch the host's drone landing on the moon. What's the point of making a fuss."
"Now that the drone has entered the sky over Fuhai, where is our observation team in Fuhai? Cheers over there!"
"Cheers here! The tracking team of Fuhai Xia has successfully locked the target, the drone is flying normally, the tracking and shooting is normal, and the remote sensing signal is normal!"
Several netizens with Fuhai Xiamen ID sent a series of tracking images.
In the image, the background of the indigo sky with a hint of purple is dotted with stars, and a comet-like light and shadow is advancing.
After the image is enlarged, you can clearly see the figure of a drone, spraying tail flames, covered with starlight, and running into the distance.
"Where is the Bay Center? Where is the Peak Team in the Bay?!"
"The Wanzhong Mountain Top Team successfully locked the target after raising 180 mountain mosquitoes. The drone flew normally, the tracking and shooting was normal, and the remote sensing signal was normal!"
The mountaintop team in the bay waited for several minutes and also sent out a series 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.
"Wanbei! How is the situation in Wanbei?"
"Everything is normal in Wanbei, the target was successfully locked, the drone's flight is normal, the tracking and shooting is normal, and the remote sensing signal is normal!"
"Wanbei University is the last stop for tracking and remote sensing of drones for this moon landing. We will continue to track the target until the target exceeds the fastest speed in the universe and enters orbit around the planet!"
"Well done to Wanbei!"
"Compatriots on both sides of the Taiwan Strait are one family! Well done!"
In the live broadcast room, as the continuous tracking is normal, the remote sensing signal is normal.
A group of netizens and university clubs involved in tracking remote sensing couldn't help but cheer and celebrate.
After experiencing the previous two live broadcasts, they had all been impressed by Yifei's drone technology and Chen Yi's technology.
This time the drone landed on the moon, while other netizens were still doubting and shouting.
They had already prepared the shooting equipment, and in just two hours completed the installation of the shooting equipment, the positioning of the shooting angle, the calculation of the route, the planning of tracking remote sensing, etc.
"6.85 kilometers per second, acceleration 10.9 meters per square second, it is expected to enter the first speed in three minutes..."
Ignoring the barrage and the cheers and celebrations of netizens, Chen Yi focused entirely on the surveillance screen in front of him, always paying attention to the high-speed parameters, speed parameters, angle parameters, etc. of the drone.
"Entering the Pacific Ocean, the signal controlling the antenna is almost obscured by the curve of the ground."
After waiting for a while, Chen Yi looked at the control antenna pointing eastward and almost at the lowest horizontal angle. Without hesitation, he waved to Qin Xiaoyu.
"The drone took off, at an altitude of 800 meters, at an angle of 60 degrees, accelerating eastward at supersonic speed..."
