Start with a blacksmith shop

The test to verify the aircraft model is in full swing, especially Cai Xiongfei's current state, he has been deeply attracted by this small model aircraft.

The performance of this model aircraft was really outstanding, completely beyond his expectations.

Especially with the layout of this helicopter, the parallel twin rotors allow all the horsepower of the aircraft to be used effectively. With no reaction force, there is no need to estimate the tail rotor at all.

So the effect is that under the same horsepower, the overall performance is 30-60% higher than that of ordinary helicopters.

A week has passed unknowingly since the delivery ceremony. During this week, he and Cai Xiongfei conducted test flights of the aircraft model over the company's open space every day.

Cai Xiongfei held the remote control in his hand and controlled the model aircraft to land slowly not far from the two of them.

After the aircraft comes to a stop, all power is turned off and the two sets of rotors are controlled to retract.

After doing this, he turned his head and looked at Li Zhenhua.

"It has been more than half a month since the test flight. So far, I haven't had any problems with this model aircraft.

And some actions that are very demanding for aircraft can also be done on this model aircraft.

It’s a very flexible helicopter, and it’s also quite heavy! "

After Cai Xiongfei said these words, he took off the remote control from his neck and showed it to him.

"The only thing is that this remote control method is not that good for me as a pilot.

At first, I thought the control method was a simulated control cabin like Suzaku, but after I arrived, I realized it was a remote control for a model aircraft.

I didn't expect this, so in some actions, using this remote control is not as intuitive as the control method, nor is it as flexible. "

Li Zhenhua, standing opposite him, listened quietly to his narration.

I was also thinking about this question Cai Xiongfei said in my heart. Earlier, I thought this was a model aircraft for verification.

There is no need to be so precise, but I really haven't considered what the other party has proposed now.

It is indeed an oversight. It is still a simulated control cabin, which is suitable for pilot control.

"Captain Cai, I really didn't consider this well. If you wait for me for two days, my virtual control warehouse will be ready.

As long as the aircraft model is slightly modified and some electronic components are added, an aircraft model controlled by a realistic control cabin can be easily realized.

After we complete the virtual control warehouse, would you please measure some important data?

In this way, the data I collect will be accurate and provide me with direction for future improvements. "

After listening and nodding towards him, he asked again.

"So at this stage, please tell me about your feelings about this model aircraft.

Are there any areas that you think need improvement? "

Facing his question, Cai Xiongfei thought carefully and racked his brains to think about the shortcomings of flying this model aircraft.

"As for the shortcomings, I really haven't found them yet. In my opinion, this aircraft model has been developed very successfully.

But I have some opinions about this helicopter, let me talk to you about it!

Just when taking off, the two sets of rotors are not so fast when starting. Maybe in wartime, when performing emergency takeoff and landing missions, the advantage is not so obvious.

If this quick takeoff problem could be solved, I feel like this helicopter would be an invulnerable aircraft. "

Is the helicopter emergency takeoff too slow? This is caused by the fact that when the two sets of propellers are started, the synchronization of the two sets of propellers must be coordinated first.

This is not difficult to solve. The main reason for the current situation is that the aircraft model is too small in size, and separate control system hardware cannot be installed on the aircraft model.

On a real machine, this problem does not exist at all.

He continued to raise his head and looked at Cai Xiongfei and said, "Is there more?"

"Another point is whether this aircraft model is a little too fat. It makes me feel that it is not slim enough. Of course, this is just my own feeling."

Hearing this, he couldn't help but turn his head and look at the model aircraft parked aside. At a quick glance, he was really a little fat, and the overall proportions were indeed not so coordinated.

It seems that we still need to put some effort into the fuselage. After Cai Xiongfei’s reminder, it seems that there is really no need to make this aircraft fat.

This couldn't help but remind him of the Comanche. The stealth-designed fuselage fit his layout quite well!

Thinking of this, he decided that the fuselage of the real aircraft really needed to be modified, and it was not to be used as a transport helicopter.

The positioning is very clear. It is a multi-purpose helicopter platform that is more military-oriented. So since it is for military use, we might as well make it more thorough and pure.

The stealth appearance design is very eye-catching in terms of appearance.

"Yeah, I understand. I'll put more effort into the fuselage. Is there anything else?"

He continued to ask, but Cai Xiongfei shook his head at him.

"Okay, Captain Cai will rest for the next two days. When I change the control method of this model aircraft, please give me a test again.

Viagra, come here! "

After talking to Cai Xiongfei, he turned around and called Ning Wei over.

Ning Wei looked helpless when he heard his name being called, but since he was called, he couldn't help but react.

He had been arguing with Li Zhenhua for a long time about his name, but he had never been allowed to change it, so he gave up resistance.

"Viagra, call a brother and take Captain Cai for a walk around our area, and also visit the scenic spots here."

After exchanging a few words with Ning Wei and arranging Cai Xiongfei's affairs, he asked someone to carry the model airplane and walk back to the workshop.

Back in a small cubicle in the workshop, the largest automotive laboratory was manufacturing Qingniu buses. He would not go in if he had nothing to do.

This small cubicle was prepared by him for making some small things, and the equipment inside was all from when he was playing with watches, and he moved it here from the second floor of the blacksmith shop.

After returning here, he did not immediately start changing the control mode of the aircraft model. Instead, he placed the aircraft model on the workbench, and he returned to the rest room, lay on the bed and closed his eyes.

After all, he had never thought about changing the control mode of the aircraft model into a realistic control cabin before, so he has no transformation plan at all now.

So what we need now is to come up with the transformation plan. This is also the time to use the virtual laboratory.

Entering the laboratory, a small aircraft mold appeared in front of him with a wave of his hand.

He immediately dismantled the aircraft model body, and when he removed the electronic control system inside, he stopped completely.

The control system hardware that was previously designed to be used on the real machine was also realized. Looking at the parts on both sides, I suddenly had a headache.

As for the reason, it is entirely because the electronic control system hardware to be added is too large. If it is not streamlined, there is no way to install it into the aircraft model.

So the first thing that needs to be optimized is these hardware. Fortunately, this is a model aircraft, which is very different from the real aircraft, so the computational load is not as large as that of the real aircraft, and the corresponding electronic hardware is also easy to optimize.

Slowly, these hardwares have been optimized from the size of a notebook to the size of a mobile phone, and the integration inside is very high. Fortunately, some graphene wires are used, otherwise heat dissipation would be a problem.

Moreover, he also upgraded the hardware used in the control system. The increase in the functions of these two parts made the entire electronic system of the aircraft model larger.

The difficulty of upgrading is undoubtedly more difficult than redesigning. Fortunately, he is a cheating man, and his cheating life does not need to be explained.

These two problems on the model aircraft were all solved very smoothly!

After solving the problem of this little thing, he also turned all his attention to the real machine.

Compared with the problems with the model aircraft, the problems faced by the real aircraft are what he now wants to focus on solving.

The problems that are reflected in the model aircraft are also reflected in the real aircraft. Regarding control and take-off speed, it is not that difficult.

The control on the real aircraft is not a remote control. The real aircraft is not a drone mode, but a manned aircraft, so the control problem no longer exists.

Another problem is the issue of emergency takeoff. Since the aircraft is very large, it is difficult to find a space that can accommodate electronic components the size of a chassis.

The main function of this control system is to control the maximum power output of the six electric motors at startup.

These two obvious problems on the model aircraft are not so difficult to solve on the real aircraft. In fact, these two problems are not problems on the real aircraft.

The biggest problem facing the real machine is Cai Xiongfei's inadvertent comment.

It was that sentence that was a little too fat, and it was this sentence that made him find a crux of the real machine.

Since it is a completely new design model, why should we limit it to the previous vision?

The Veyron, Falcon, and the J-36 (Suzaku) designed by him all adopt stealth designs. Fighters all use stealth designs, so why can't they be used on helicopters?

Besides, this concept is not too advanced, so the body of the real machine needs to be redesigned.

In addition to the concept of stealth, the entire aircraft model was redesigned, and the stealth paint previously developed for the J-36 was used on the outer shell of this helicopter.

In fact, the stealth design of a helicopter is ten times, dozens of times, or even hundreds of times more difficult than the stealth design of a fighter jet. This is entirely due to the attributes of the helicopter.

The propeller rotating above his head alone is not easy to solve. The rapidly rotating propeller is simply an unsolvable problem for non-reflection of radar waves.

Fortunately, the new helicopter he designed has eliminated the flaw of the tail rotor, otherwise the difficulty will increase.

But these can't stump him. He is a person who rises to difficulties. Of course, the main reason is that he can cheat.

The first is the stealth design of the fuselage shape. If a helicopter wants to achieve stealth, it must first solve the problem from the aerodynamic layout.

His current dual-rotor design undoubtedly makes stealth more difficult. Fortunately, this is another experience we can learn from.

Regarding the stealth design of helicopters, although the design experience of stealth fighters cannot be copied, it still has reference significance.

Therefore, some good stealth designs on fighter planes can be transferred to helicopters.

The principle of appearance stealth that had been proven on the J-36 was applied to the appearance of the helicopter.

Due to the characteristics of helicopters, they are different from jet fighters that operate at high altitudes. The range of helicopter activities is generally at low altitudes and ultra-low altitudes.

And they all move within a certain range. For radar stealth, you can use your own stealth design and use complex ground terrain to avoid local radar detection, such as mountains, canyons, etc.

Therefore, when it comes to helicopter stealth, compared to traditional fighter aircraft, appearance stealth design is not that important.

With his previous experience on the J-36, his successful stealth design experience is completely sufficient.

Slowly, the shape of the fuselage was changed according to his design, and actual tests of radar wave reflection were also conducted in the laboratory.

To achieve stealth from this direction alone, obviously the performance on the radar is not so ideal. The two sets of rotors above the head are the problem.

After his multi-faceted experiments, the appearance of the aircraft became less and less like a traditional helicopter.

After many changes, the shape resembled an angular flat inverted cone, wrapping the rotor that had always been a stealth problem.

After wrapping the rotors, the stealth effect immediately increased exponentially.

Now he can proudly say arrogantly to all the helicopter design institutes in the world: "Don't get me wrong, I'm not targeting anyone. I want to say that everyone here is rubbish!"

However, for the sake of stealth, the folding wing function of the ship was eliminated. After he discovered it, the shape had already been designed and he began to optimize it on this basis.

The package that belongs to the fuselage and the rotor has been optimized to be foldable. When the folding is completed, these package components are received on the fuselage below, and the rotor is still folded toward the rear as before.

When he completed this step, he had no more moves in terms of appearance. He had already used all his skills at his disposal.

Maybe in the future, with the increase of knowledge, the appearance can be improved, but at present, he has no way to optimize it.

Returning to the problem of helicopter stealth, he has already achieved the ultimate in appearance, but there is another problem that cannot be ignored.

That's noise. The missions that helicopters have to perform are all ground strikes, tanks, seizing tidal flats, covering infantry in special missions, cooperating with special forces to perform beheadings, etc.

These tasks require close range to be completed, and the noise generated by the helicopter can be heard several kilometers away, which is extremely detrimental to the helicopter's penetration and safety.

How to solve the noise of helicopters depends on the causes.

The main reason is that when the propeller is flying, it will rotate and cut the air. The friction with the air will produce extremely high decibel noise, which is also the main reason for exposure.

So his next step was to consider how to eliminate the noise and reduce the squealing noise as much as possible.

There are two main sources of helicopter noise, engine noise and blade noise.

Engine noise is easy to solve. For this helicopter, it is completely negligible because it does not use a traditional engine.

He uses an electric motor, so it has an inherent advantage over a fuel engine in terms of quietness, and the electric motor he uses,

It will be used on high-end models at the beginning, so silence is also an important indicator of high-end luxury cars, and it controls the noise very well.

Under this background, the problem of engine noise no longer exists. The next step is to reduce the noise generated by the two sets of propellers.

In this regard, in his research, he came up with a solution that combined three methods to solve the problem of blade noise.

The first is to carry out sound insulation and sound-absorbing design on the surrounding area of ​​the rotor. The principle used is not responsible. In fact, it is the principle of soundproof room.

The originally smooth surroundings were transformed into a honeycomb structure. Many small honeycombs formed a large honeycomb, and the overall structure was a honeycomb structure.

The second is to optimize the source of noise. The noise generated by the rotation of the rotor is reduced by changing the shape of the blades.

The specially designed blade shape reduces noise to a certain extent.

After optimization through the previous two methods, the noise is smaller than before, but the relative noise is still relatively large.

This is about the third point of his unique design. His aircraft has two sets of rotors.

The noise generated by the ten blades was already very small after two measures. Here he came up with the idea of ​​using the principle of ultrasonic waves to eliminate the remaining noise.

Through a special device between the two sets of rotors, the audible sound generated by the blades is converted into ultrasonic waves.

The final noise treatment is carried out by taking advantage of the characteristics of ultrasonic waves, which have short wavelengths and are easily lost and scattered in the air, and cannot travel as far as audible sounds.

Of course, ultrasonic waves are harmful to the human body to a certain extent, so in his design, this special device will not be turned on under normal circumstances. It will only be turned on when performing tasks that require stealth.

Moreover, professional protection has been carried out in the helicopter cockpit, and the protection against ultrasonic waves is absolutely exhaustive.

To sum it up in one sentence, Li Zhenhua's shooting on this helicopter has evolved to a perverted level.

The helicopter's stealth performance is also based on multiple aspects. It is not only evading radar, but also provides almost abnormal protection against noise.

And all the external weapon hardpoints on the appearance are designed as internal magazines, which is more abnormal than the design of any stealth armed helicopter in the ball.

It is entirely its appearance and stealth requirements that determine this design!

This helicopter is completely different from mainstream helicopters in appearance!