Chapter 1219: Test flight

The engine of the flying saucer car is under the flying saucer, and when the flying saucer just takes off, it rises vertically. Under the flying saucer car, there is a powerful nuclear fusion engine. Although the engine uses nuclear fusion technology, its appearance is similar to that of a jet fighter engine, and it still uses a vortex jet engine. Because only with such an engine can provide powerful power to the aircraft.
There are two swirl nozzles on both sides of the engine installed under the flying saucer. These two nozzles are the devices that power the UFO car. Of course, these two nozzles can also change the flying direction of the UFO vehicle.
Just like the current flying saucer car wants to rise vertically, these two nozzles that can rotate up and down, left and right can change the flying direction of the flying saucer car. Allow UFO cars to directly rise vertically.
The reason why the flying saucer car designed by Zhao Zhongyao also uses this jet engine is because in the development of high-power aircraft engines, once the speed of sound is to be broken, only jet engines can be used. The traditional piston engine cannot make the speed of the aircraft exceed the speed of sound at all.
However, ordinary fuel turbojet engines can only make the speed of the aircraft reach 2-3 times the speed of sound. This can be said to be a limit. To further increase the speed of the aircraft, only a more powerful nuclear engine can be used.
Although nuclear fission engines can also generate a lot of power, Zhao Zhongyao knows that only nuclear fusion engines can produce more powerful thrust. The speed of the aircraft can reach ten times or even dozens of times the speed of sound.
In fact, the power of this UFO car developed by Zhao Zhongyao is not particularly large. After all, this can only be regarded as an experimental flying saucer. In the future, some more advanced flying saucers will be developed. This flying saucer can only be regarded as an experiment.
For such a new thing, everyone is very curious, but also a little worried. After all, to be a test pilot of an aircraft, of course, you have to take a lot of risks. Just like Zhao Zhongyao now, if he wants to fly his own flying saucer car himself, it must be dangerous.
But Zhao Zhongyao is also very optimistic about the UFO car he developed. He knew that this flying saucer car would be able to fly smoothly at high altitudes without any problems.
Now the flying saucer car has slowly lifted into the air. At the beginning, the flying saucer just flew directly into the sky. At this time, you just can't use too fast speed, after all, the flying saucer is a straw hat. If you take off directly and vertically, the resistance will be great.
If at this time, you increase the speed quickly, then you will be in trouble. Because everyone knows that when an aircraft is flying in the air, when the speed is approaching the speed of sound, it will encounter a sound barrier.
The so-called sound barrier is also called sound barrier. It is because the straight-wing aircraft with large aspect ratios, when the flying speed is close to the speed of sound, there will be a sharp increase in drag, deterioration of control performance and spontaneous slumping phenomenon, and the flying speed cannot be increased. Therefore, people once thought that the speed of sound is an airplane. Speed ​​is an insurmountable obstacle, hence the name.
Before humans had developed a supersonic aircraft, they felt that the sound barrier was impossible to surpass. It feels that human aircraft cannot exceed the speed of sound.
But later, people discovered in practice that when the flight speed reaches nine tenths of the speed of sound, that is, when the Mach number M0.9 is about 950 kilometers per hour in the air, the speed of the local airflow may reach the speed of sound, generating a local shock wave, thereby causing aerodynamics. Resistance has skyrocketed. To further increase the speed, the engine needs more thrust.
What's more serious is that the shock wave can make the air flow through the wings and the surface of the fuselage become very turbulent, which makes the aircraft shake violently and make it difficult to control. At the same time, the wings will sink and the nose will drop; if the aircraft is climbing at this time, the fuselage will suddenly automatically rise.
These unpleasant symptoms may cause the plane to crash. This is the so-called "sound barrier" problem. Since the transmission speed of sound waves is limited, the moving sound source can catch up with the sound waves it emits.
When the speed of the object increases to the same as the speed of sound, sound waves begin to accumulate in front of the object. If the object has sufficient acceleration, it can break through the unstable sound wave barrier and rush to the front of the sound, that is, break through the sound barrier.
An object moving at supersonic speed will continue to produce a steady pressure wave in front of it. When the object is moving toward the observer, the observer will not hear the sound; after the object passes, the generated wave will be transmitted toward the ground, and the pressure difference between the waves will form an audible effect, that is, a sonic boom. When the flying speed of an aircraft is lower than the speed of sound, the air in contact with the aircraft acts like a "communication officer", "notifying" the air that is about to encounter the aircraft ahead at the speed of transmitting the sound, making them "give way."
But when the speed of the aircraft exceeds the speed of sound, the air in front of the aircraft is tightly compressed because it is too late to escape, and gathers into a thin wave surface-shock waves. Behind the shock waves, the air is compressed and the pressure suddenly rises. High, preventing further acceleration of the aircraft, and may cause the wings and tail to vibrate violently and explode.
The sound barrier is not only the sound wave, but also the resistance from the air. When a flying object is flying close to Mach 1 (speed of sound), the air rushing in front cannot spread through the fuselage as usual, so the gas is accumulated. When it reaches the surroundings of the flying object, a great pressure is generated, which will also cause an invisible air vortex, commonly known as the "death vortex", which is also called a sound barrier. If the fuselage is not specially reinforced, it will be shaken instantly. Into pieces.
Therefore, after human beings understand these principles, they will know how to break through the sound barrier. The first is to develop very strong materials for making aircraft wings and shells. Also, the wings of the airplane must be very thin. Because, only if the wing is thinner, when the air flows quickly over the wing, the drag generated will be relatively reduced.
If the wing is very thick, obviously when the aircraft is flying at high speed, it will produce strong resistance to the wing. In this case, if the material of the wing itself is not very strong, it will be easy to fly at high speeds, and when the speed is close to the speed of sound, the tragedy of falling into the sand will occur.
Therefore, the materials used in the supersonic fighters developed by mankind are all super expensive alloy materials. It can be said that it is much better than the materials used for any vehicle on the ground. Even the materials used in some luxury cars cannot be compared with the materials used in fighter jets.
Generally speaking, new fighters are developed with the latest high-strength aluminum alloys, titanium alloys, magnesium alloys and other high-tech materials.
For supersonic aircraft, in terms of materials, it is necessary to have both high strength and high flexibility. It must have both materials before it can be used on supersonic aircraft.
It can be said that flexible materials are very important in supersonic aircraft. Because when the aircraft is flying at high speed, it will deform the wings or the fuselage due to the huge pressure of the air. Under such circumstances, if the wing of the aircraft can be deformed on its own initiative when encountering huge resistance, it will obviously be very beneficial to the safety of the aircraft itself.
This is like when you use Taijiquan, you can use softness to overcome the rigidity. In aircraft development technology, this technology is now called skinning technology. The image understanding means that the aircraft is covered with a layer of skin to make the shape of the aircraft more flexible.
Of course, if the speed of the aircraft exceeds the speed of sound, the shape of the aircraft is also very important. It must be a streamlined body. And the wing must be swept back. Because only the swept wing can greatly reduce the drag of the aircraft at high speed.
Also, the size of a supersonic aircraft cannot be too large. After all, the larger the volume, the greater the drag during flight. In this way, when flying at high speeds, the greater the risk of sound barriers.
Therefore, the overall dimensions of any fighter that can fly at high speeds are not very large. The length is generally more than ten meters, and the wingspan is generally not more than ten meters. Only such a compact and streamlined fuselage, coupled with the shape of a swept-back wing, can prevent the plane from crashing and killing people when flying at high speed.
Although at the beginning, mankind paid a lot of effort and a huge price to break through the sound barrier, but after decades of development, mankind has gained a lot of experience and lessons in breaking through the sound barrier. Humans can now easily master this supersonic technology.
All this is of course not a problem at all for a genius scientist like Zhao Zhongyao.
Zhao Zhongyao's current UFO car's appearance is a straw hat. The thickness of the entire circular wing is only ten centimeters. The exterior glass windows of the cockpit above use the most advanced high-strength glass. It allows UFO cars to fly at extremely high speeds without worrying about glass windows breaking.
When developing the fuselage and wings of a flying saucer vehicle, Zhao Zhongyao also used a large number of new materials, biosteel, which he had previously developed. This material is not only very hard, but also very tough.
It can be said that the new bio-steel material developed by Zhao Zhongyao already possesses the high-tech skinning technology applied on modern sixth-generation fighters.
With these new materials and powerful nuclear fusion engines, Zhao Zhongyao can of course develop a very advanced flying saucer car.
Zhao Zhongyao is now driving a flying saucer car into the sky. The reason why he wants to try to drive this flying saucer car by himself is mainly because other people don't understand the flying saucer car he developed.
Because this UFO car is not an ordinary car. It can't even be regarded as an ordinary airplane. Although it is called a UFO car, in fact, it is not a car in the eyes of ordinary people. This can only be regarded as a new type of human aircraft.
The reason why Zhao Zhongyao wants to drive this flying saucer car for test flight now is because only he knows this flying saucer car best. Only by personally testing the flight can the danger be minimized. If someone else is allowed to test the flight, it must be very dangerous, because others don't know the flying saucer car very well.
Even these ‘Flying Group’ scientific and technical personnel who personally developed this flying saucer car with Zhao Zhongyao. They only developed it according to the drawings designed by Zhao Zhongyao. And what they know about this flying saucer car is not very detailed.
Not to mention ordinary technicians, even Cheng Yu, the leader of the Feitian Group. It can be regarded as a right-hand man of Zhao Zhongyao, and he doesn't know much about the flying saucer car in front of him.
Now if an ordinary technician were to test the flying saucer car, it would be very dangerous. Not to mention anything else, if you don’t understand the performance of the flying saucer and some aerodynamic principles just because of this lifting movement, as soon as the flying saucer is lifted, it may encounter a sound barrier, and then it will be dangerous.
Because the shape of the flying saucer is a straw hat. When the flying saucer rises vertically, it produces a lot of resistance. At this time, if you don't control the speed and use the high-speed ascent directly, it will of course be very dangerous.
Imagine that a flying saucer uses a super powerful nuclear fusion engine. If the speed is not well controlled when it is directly ascending vertically, it will soon produce a sound barrier. In this case, it is equivalent to letting the UFO car hit a wall directly.
Just imagine, what the result would be like this! Even if the materials used to develop the UFO car are very strong and will not shatter the UFO car, it may also cause serious deformation of the UFO car. The original straw hat may become twisted!
Therefore, Zhao Zhongyao must come to test the flying saucer car himself to be relieved. If someone else is asked to test the flight, of course he will be worried.
Although Zhao Zhongyao already knows something about the performance of this UFO car. But when there is no formal test flight, all its technical parameters can only be at a theoretical stage. Only after the actual test flight can we know whether some technical parameters of this flying saucer car are in accordance with the theory.
The flying saucer car designed by Zhao Zhongyao can reach a maximum speed of Mach 10, which is approximately 10,000 kilometers per hour. But this is only the theoretical speed, and how much it can actually achieve is only known through experiments.
There is also the turning radius of the UFO car. The theoretical technical parameters designed by Zhao Zhongyao are no more than five meters. In other words, the turn is almost on the spot, without a flight arc at all. It can turn at right angles. Because the width of the UFO car itself is five meters!
Now Zhao Zhongyao is driving his beloved UFO car, and he starts to ascend into the sky. He kept looking at the altitude and speed of the flight. Now the flying saucer has reached a height of one kilometer, and the flying speed has reached 700 kilometers per hour, which is almost the speed of an ordinary passenger plane.