The test of verifying the model airplane is in full swing, especially Cai Xiongfei's current state, which has been deeply attracted by this small model airplane.

It's really the performance of this model airplane is so good, it completely exceeds his expectations,

Especially in the layout of this helicopter, the parallel twin rotors allow all the horsepower of the aircraft to be used, and there is no need to estimate the tail rotor after there is no reaction force.

Therefore, the effect is that under the same horsepower, the comprehensive performance is 30-60% better than that of ordinary helicopters.

A week has passed before the delivery ceremony, and during this week, he and Cai Xiongfei have been conducting test flights of model airplanes in the company's open space every day.

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

Once the aircraft is at a standstill, all power is turned off and two sets of rotors are controlled.

After doing this, he turned his head to look at Li Zhenhua.

"It's been more than half a month since the test flight today, and so far I haven't had any problems with this model airplane.

And some actions that have high requirements for the aircraft can also be made on this model aircraft.

It's a very nimble helicopter, and it's also heavy in weight! ”

After Cai Xiongfei finished speaking, he took off the remote control around his neck and showed him the remote control.

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

At the beginning, I thought that the control method was the same as the Suzaku realistic control cabin, but after I came, I realized that it was a model airplane remote control.

I didn't expect that, so in some movements, using this remote control is not as intuitive as that control, nor is it that flexible. ”

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

I was also secretly thinking about the question Cai Xiongfei said in my heart, earlier, I thought that this was a model airplane, for verification,

There is no need to do it so carefully, but now the other party has put it forward, and I really haven't taken it into account.

It is indeed a bit negligent, but it is still a way to simulate the control compartment, which is suitable for the pilot's control.

"Captain Cai, this point is indeed not considered by me, in this way, you wait for me for two days, the simulated control warehouse on my side is ready-made,

As long as the model aircraft is slightly modified and some electronic components are added, a model aircraft controlled by a simulated control compartment is still very easy to achieve.

After we have done a good job of simulating the actual control warehouse, please test some important data again.

This way, the data I collect is accurate and provides a direction for future improvements. ”

After nodding at him, he asked again.

"So at this stage, you and I can talk about the feelings of this model airplane.

What do you think needs to be improved? ”

Faced with his question, Cai Xiongfei thought about it carefully, racking his brains to think about the shortcomings of flying this model aircraft.

"If you want to talk about the shortcomings, I really haven't found out, in my opinion, this model aircraft development is very successful,

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

That is, at the time of takeoff, the two sets of rotors will not be so fast when they start, and it may be that in wartime, when performing emergency take-off and landing tasks, the advantage is not so obvious.

If I could solve this problem of fast take-off, I feel that this helicopter will be an unassailable aircraft. ”

Helicopter emergency take-off is too slow? This is due to the fact that when the two groups of propellers are started, the synchronization of the two groups of propellers must be coordinated first.

This is not very difficult to solve, the main reason for the current situation is that the model aircraft is too small in size, and there is no way to install the control system hardware on the model aircraft alone.

On a real machine, this problem simply doesn't exist.

He continued to raise his head and look at Cai Xiongfei and said, "Is there anything else?" ”

"Another point is whether this model airplane is a little too fat, and it gives me the feeling that it is not slim enough, of course, this is just my own feeling."

Hearing this, he couldn't help but turn his head to look at the model aircraft parked on the side, and suddenly saw that it was really a little fat, and the overall ratio was indeed not so coordinated.

It seems that there is still some work to be done on the fuselage, after Cai Xiongfei's reminder, it seems that there is really no need to make this plane a fat man,

This can't help but remind him of Comanche, the stealth design of the fuselage, which is quite in line with his layout!

Thinking of this, he decided, for the real fuselage really had to be changed, and it was not used as a transport helicopter to get it.

The positioning is very clear, it is a multi-purpose helicopter platform that is more military, so since it is military, you might as well let him be thorough and pure.

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

"Uh-huh, I see, I'll work a little more on the fuselage, is there anything else?"

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

"That's okay, Captain Cai will rest for the past two days, and when he changes the control method of this model airplane, please test it again.

Viagra, come here! ”

After talking to Cai Xiongfei, he turned his head and called Ning Wei on the side.

Ning Wei listened to his name, his face was helpless, but since he called him, he couldn't help but react.

On his name, he has been fighting with Li Zhenhua for a long time, and he has never been asked to change it, so he gave up resistance.

"Viagra, you call a brother, take Captain Cai to walk around on our side, and also visit the famous places on our side."

explained a few words to Ning Wei and arranged Cai Xiongfei's affairs, while he asked people to carry the model aircraft to the workshop and walked back.

Back in a small cubicle in the workshop, the largest automotive lab was building the Green Ox Bus, and he wouldn't be in it if he was fine.

This cubicle was prepared by him to make some small things, and the equipment in it was moved from the second floor of the blacksmith shop to this side when he was playing with the watch before.

After returning here, he did not immediately start to change the control mode of the model airplane, but put the model airplane on the workbench, while he himself returned to the rest room, lay on the bed and closed his eyes.

After all, he hadn't thought about it before, and he wanted to make the control mode of the model aircraft into a realistic control cabin, so he didn't have a transformation plan at all now.

So now it's time to get the transformation plan out, and it's time to use the virtual lab.

Entering the laboratory, he waved his hand and displayed a small aviation mold in front of him.

The model airplane body was immediately disassembled, and when the electronic control system inside was dismantled, he completely stopped.

The control system hardware that was designed before was also used on the real machine, and I suddenly had a headache when I looked at the parts placed on both sides.

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

Therefore, the first thing to be optimized is these hardware, fortunately, this is a model aircraft, and there is a big gap with the real machine, so the amount of computing is not as large as the real machine, and the corresponding electronic hardware is also easy to optimize.

Slowly optimized these hardware from the size of a notebook to the size of a mobile phone, and the integration in it is very high, which is also fortunate to use a part of the graphene wire, otherwise the heat dissipation is a problem.

And he also upgraded the hardware to be used in the control system, and the increase in the functions of these two parts has increased the electronic system of the entire model airplane.

Among them, the difficulty of upgrading is undoubtedly more difficult than redesigning, but fortunately, he is a man who is open, and his life does not need to be explained.

It is very smooth to solve these two problems on the model aircraft!

After solving the problem of this little thing, he also put all his attention on the real machine,

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

The problems reflected in the model aircraft are also manifested in the real aircraft, and the two items of control and take-off speed are not so difficult problems.

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

Another problem is the problem of emergency take-off, which is very large because of the large body, so it is easy to find a space that can put down electronic components the size of a chassis.

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

And these two problems that are obvious in the model aircraft are not so difficult to solve in the real aircraft, in fact, these two problems are not considered problems in the real aircraft.

The biggest problem faced by the real machine is Cai Xiongfei's inadvertent complaint.

It's that sentence that is a little too fat, and it's also this sentence that makes him find a crux of the real machine.

Since it's a completely new design, why limit it to the previous vision,

Weilong, Falcon and the J-36 (Suzaku) he designed are all stealth designs, and the fighters all use stealth designs, so why can't they be used in helicopters?

What's more, this concept is not too advanced concept, so the body of the real machine has to be redesigned.

Coupled with the concept of stealth, the overall model was redesigned, and the stealth paint previously developed for the J-36 was used on the shell of this helicopter.

In fact, the stealth design of a helicopter is ten, dozens, or even hundreds of times more difficult than the stealth design of a fighter, which is entirely determined by the attributes of the helicopter.

The propeller spinning above his head alone is not so easy to solve, and the fast-spinning propeller is simply an unsolvable problem for not reflecting radar waves.

Fortunately, the new helicopter he designed has removed the flaw in the tail rotor, otherwise the difficulty will rise.

But these can't stump him, he is a person who rises to the challenge, of course, the main reason is that he can hang up.

The first is the stealth design of the fuselage shape, if the helicopter wants to achieve stealth, the first thing to solve is to start from the aerodynamic layout.

His current dual-rotor design undoubtedly makes stealth more difficult, but fortunately, this is another experience that can be used for reference.

For the stealth design of the helicopter, although the design experience of the stealth fighter cannot be copied, it is still of reference significance.

So some good stealth design on the fighter can be carried to the helicopter.

The principle of stealth in appearance, which has been verified on the J-36 before, was used by him in the shape of the helicopter.

Due to the characteristics of helicopters, they are not different from jet fighters that operate at high altitudes, and the range of helicopter activities is generally at low altitudes and ultra-low altitudes.

And they are all active in the range, for the formation of stealth on the radar, you can use its own stealth design, and through complex ground terrain, to avoid the detection of local radar, such as mountains, canyons, etc.

Therefore, on the topic of helicopter stealth, compared with traditional fighters, the appearance stealth design is not so important.

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

Slowly, the shape of the fuselage changed with his design, and he also did practical tests of radar wave reflection in the laboratory.

To achieve stealth from this direction alone, it is obvious that the performance on the radar is not so ideal, and the two sets of rotors overhead are the problem.

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

Under his many changes, the shape is like an angular flat inverted cone, and the rotor that has always been a stealth problem is also encased.

After wrapping the rotor inside, the stealth effect immediately increased exponentially.

Now he can proudly say to all the helicopter design and research institutes in the ball: "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 upper ship was lost, and after he found out, the shape that had been designed was once optimized on this basis.

The wrapping of the rotor belonging to the fuselage is optimized to be foldable, and when the folding is completed, these wrapping parts are received on the fuselage below, and the rotor is still retracted to the rear as a whole.

By the time he had completed this step, he had no more moves in appearance, and he had used all the tricks he had now mastered.

Maybe in the future, with the increase of knowledge, the appearance can still improve, but at present, he can't optimize it.

Back to the problem of helicopter stealth, the previous in terms of appearance, he has done it to the extreme, but this can not ignore another problem.

That is noise, for the tasks to be performed by helicopters, they are all ground strikes, what tanks, seizing tidal flats, covering infantry to carry out special tasks, cooperating with special forces to carry out decapitation, and so on.

These tasks can only be completed at close range, and the noise generated by the helicopter can be heard from a few kilometers away, which is extremely detrimental to the penetration and safety of the helicopter.

And how to solve the noise of the helicopter, it is from the cause,

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

So his next step was to think about how to eliminate the noise and generate as much screaming noise as possible.

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

Engine noise is easy to solve, and for his helicopter, it is completely negligible, because he does not use a traditional engine.

He uses an electric motor, so in terms of silence, the innate has an advantage over the fuel engine, and the motor he used,

At the beginning, it was used on high-end models, so silence is also an important indicator of high-end luxury cars, and he controls the noise very well.

In this context, the problem of engine noise is no longer the problem, and 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 combines three methods, which has reached the problem of solving the problem of paddle noise.

First of all, it is to carry out sound insulation and sound absorption design on the top surrounded by the rotor perimeter, and the principle of using it is not responsible, in fact, it is the principle of using the soundproof room.

The original smooth perimeter was surrounded by him, and he made a honeycomb structure, and many small honeycombs formed a large honeycomb, which was a honeycomb structure in general.

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

The specially designed shape of the paddle minimizes noise to a certain extent.

After the optimization of the previous two methods, the noise is small enough compared to before, but the relative noise is still relatively large.

This brings us to his unique third point of design, his aircraft has two sets of rotors.

The noise generated by the ten blades, after two measures, was already very small, and here he thought of a way to use 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 propellers is converted into ultrasonic waves.

The use of ultrasonic wavelength is short, easy to lose in the air, easy to scatter, not as good as audible sound propagation characteristics, the final noise treatment.

Of course, ultrasound is harmful to the human body to a certain extent, so in his design, this special device is not usually turned on, but only when performing tasks that require stealth.

And in the cockpit of the helicopter, professional protection is carried out, and the protection against ultrasonic waves is simply all-encompassing.

To sum it up in one sentence, that is, Li Zhenhua's shooting on this helicopter has evolved to the level of perversion.

The performance of helicopter stealth is also from multiple directions, not only in terms of radar avoidance, but also almost perverted protection against noise.

And those external weapon attachment points on the shape are all designed as internal magazines, which is more perverted than the design of any stealth gunship in the ball.

It's all about its shape and stealth requirements that dictate this design!

This helicopter is not at all different from mainstream helicopters in appearance!