In 1996, China spent a huge amount of $66 million to purchase eight sets of Soshui-2000MS radars from the United Kingdom, which were planned to be installed on the Y-8 platform and handed over to the naval aviation for use to search for surface targets, so as to guide the J-7 to launch anti-ship missiles to attack.

In the end, a total of 4 Y-8J maritime warning aircraft were produced.

These four planes were also China's only air-based long-range detection force at the turn of the century.

Performance...... It can only be said that it is not satisfactory.

However, at least it can be regarded as solving the problem of whether there is a problem, and this kind of aircraft still has a certain command capability, so our army has accumulated a lot of experience in the tactical arrangement and use of real early warning aircraft in advance.

Because the radar purchased from the UK has not yet arrived, the Y-8Y in front of Chang Haonan is actually just a platform model waiting to be modified, and the main task at this stage is to conduct test flights in various environments to obtain sufficient flight data.

By this time, the plane parked in the hangar had already suffered noticeable damage, and the improved nose radome, as well as the nose landing gear, had become almost unresonant due to the impact of landing.

Fortunately, the cockpit and wing parts were relatively intact, so the crew members only suffered some injuries, and there is a possibility that they will be repaired later.

There are already quite a few staff members of the 182 factory here to inspect the aircraft.

Seeing Du Yishan and Chang Haonan walking into the parking shed, a burly middle-aged man walked up and said in Mandarin with a slight Hunan accent:

"Academician Du, according to your analysis, we have restored and simulated the flight data during the landing of the aircraft, and found that it is completely consistent with the actual situation."

"In addition, just from the assembly workshop temporarily transferred a Yun 8F, which can be used to cooperate with you for testing, the An-12 surveying and mapping imitation data and the subsequent design drawings of several improved models have also been prepared, our 182 factory from below me, no, from General Manager Wang below everyone obeys your dispatch!"

Originally, Chang Haonan didn't have any impression of the person in front of him, but after hearing his accent, he reacted instantly.

This is the chief designer of a series of improved models of the Yun-8 platform in the future, Liang Shaoxiu.

Since Chief Engineer Xu Peilin, who was originally responsible for the prototype of Yun 8 to Yun 8C, retired last year, the 182 factory, which was already relatively weak in technical strength, could only be provoked by him at this time.

But at the time of the most green and yellow, I encountered such a fatal accident.

"At my age, I'm about the same age as your Chief Master Xu, and it's okay to analyze problems, but I can't catch up with young people in other aspects."

Du Yishan waved his hand, and then gestured to Chang Haonan beside him:

"This is my student, Chang Haonan, and I think that the main work of this improvement should be done by him."

"This ......"

Liang Shaoxiu looked at Chang Haonan, who was younger than himself in front of him, and hesitated for a while.

But soon he remembered that he seemed to have seen the name:

"Oh...... The ...... that 606 declared this year"

J-8C has not yet been designed and finalized, and after all, it is a classified project, and it will not be publicized in a special public form, so Chang Haonan's more well-known identity is still the identity of the first person to complete advanced technological achievements.

Such a title sits on the outside with little influence, but is perfectly available as hard currency inside the aviation system.

"Hello, Mr. Liang, I am very happy to work with you and the comrades of Factory 182."

After the experience of the 83 Project, Chang Haonan's [management ability] has improved, and he has gradually become accustomed to dealing with similar scenes, and he is no longer the little character who was a little nervous even to participate in the seminar in his previous life.

"Hello, Comrade Chang Haonan, it's great to have Academician Du and your help, thank you."

"Now we are facing very tight time pressure, the Y-8J is developed on the basis of the Y-8C fully airtight type, and the improvement part does not involve the wing surface part of the aircraft, so this accident is a big trouble for the entire Y-8 model."

"We are about to deliver a batch of new models of Y-8F to Postal Airlines, if we can't properly solve the hidden danger of wing icing, it may lead to users refusing to accept it, and the export orders that are being negotiated with the Persian side will also be affected."

"Hmm...... I can't guarantee anything in terms of time, but I'm sure to be as efficient as possible. Chang Haonan nodded:

"Why don't we take a look at the design materials first?"

"Okay, follow me."

Looking at Chang Haonan's confident appearance, Liang Shaoxiu, who was originally anxious, also calmed down a lot.

In fact, Chang Haonan knows the crux of the problem of icing on the wings of the Y-8.

It's just that he has never been in contact with the information related to Yun 8 in this life, and it is too inconsistent to directly pat his chest and pack the ticket......

To put it simply, the design of the de-icing system of the An-12/Y-8 aircraft is not reasonable enough.

In the case of the horizontal tail, which is the most heavily iced, there is only one electrically heated de-icing system that is distributed over the entire surface of the flat tail and is evenly wetted with rain and dew, and this system also has only one maximum current mode available.

On the Soviet side, given the climatic conditions near the Arctic Circle, this design was barely usable, anyway, the temperature was low enough, and the high current was high.

Even so, the flight safety record of the An-10/An-12 is quite poor.

In China, where the temperature is relatively high, if the heating system is turned on for a long time before freezing, it will cause the insulating adhesive layer to heat up sharply and carbonize, further resulting in a short circuit and burning through the flat-tail skin

Therefore, the pilot must confirm that the flat tail is at risk of icing, or even when it has already begun to freeze, before turning on the electric heating device.

Even this is risky.

Because the thickness of the ice in different parts of the wing is different, the heating power of the de-icing device is average.

It is likely that the ice has not been removed in some places, and the insulation has begun to deteriorate in some places.

Of course, there are also fierce people who can rely on experience to prevent icing in advance by turning on the heating device for a short time many times, but this obviously should not be a requirement for the average pilot.

As for the main wing of the aircraft, as Du Yishan said before, due to the use of a more efficient aerothermal anti-icing system, there is really no need to worry about the anti-icing ability.

But it's definitely not without its problems.

Gas-thermal de-icing requires the extraction of high-temperature and high-pressure gas from the combustion chamber of the engine as a heat source, so it inevitably causes the power of the aircraft to be affected.

Therefore, the total amount of gas used should be reduced as much as possible to maintain the performance of the engine under the premise of satisfying the de-icing capacity.

However, the design of the Yun-8 system also highlights a powerful miracle idea-

It is important to know that aircraft are most likely to encounter wing icing during takeoff, landing, and low-altitude and low-speed flight.

It is also necessary for the engine to output enough power, or to be prepared to output enough power.

At this time, you pump 10% of the high-temperature and high-pressure gas to remove the ice at a time, how to ensure the power?

In addition, the environment of low-altitude and low-speed flight is already complex, and artificially adding a high-speed air flow blowing on the surface of the wing will only further increase instability.

All this makes the already poor low-speed performance of the Y-8 even worse.

"That's right, Chief Liang."

After walking out of the hangar, Chang Haonan suddenly stopped Liang Shaoxiu in front:

"It's better to have an expert in meteorology to assist us, it's much more efficient."

Thank you brothers for your support, tomorrow on the best-selling selection, plus more!

(End of chapter)