People who have not experienced ARJ21 and C919 in their previous lives will not know how much Huaxia has suffered in airworthiness certification.

It's not that with the subsystems provided by Europe and the United States, others will give you the green light in terms of airworthiness certification.

Airbus and Boeing's monopoly business is doing well, how can it be easy to get a third one involved?

Models that have not been approved by EASA and FAA are not unsold, but it is very difficult to find large customers abroad.

But the most regrettable thing is not that there was no opportunity in the first place, but that there was an opportunity but it was not seized.

In fact, at the end of the 90s, Huaxia had already established quite good relationships with airworthiness certification agencies in many European countries, and there was an opportunity to make some breakthroughs in the process of JAA's reorganization into EASA.

However, in the previous life, Huaxia's accumulation in the aviation industry was indeed too weak, and it could not come up with any practical technology that was urgently needed by Europe as it is now.

More importantly, in the original timeline, at the turn of the century, the domestic civil aviation industry, including the entire CAAC, was in the midst of the huge turmoil caused by the collapse of the MD90 manufacturing project with high hopes, and wavered on whether to engage in domestic passenger aircraft, what kind of domestic passenger aircraft to build, and whether to move closer to the FAA or EASA standards.

In the end, this time window was missed in its entirety.

After this village, there is no such shop.

By the time the domestic passenger aircraft project finally landed, EASA had already stabilized and established airworthiness barriers similar to those of the FAA, leaving no room for outsiders to operate.

And now, due to Chang Haonan's own intentional or unintentional operations in the past few months, as well as the occurrence of a series of black swan events, an opportunity to solve this hidden danger from the source has appeared in front of him.

It has to be successful!

After the general direction and basic ideas are determined, the rest is the specific work.

"I judge that, judging from the current situation, the European side should be tempted by the anti-customer-oriented idea put forward by Comrade Xiaochang during the last negotiations."

Huai Guomo opened the minutes of the first negotiation in front of him and analyzed to everyone:

"But they will definitely have concerns, especially about our level of technology in the field of icing and anti-icing, which is at the heart of the whole plan and something that is completely beyond the control of the European side."

Chang Haonan has naturally considered this issue.

So after Huai Guomo finished speaking, he took over the topic:

"It must be admitted that the overall level of our aviation industry in China is not as good as that of Europe and the United States, so from an objective point of view, this concern, or prejudice, is also reasonable. So what we have to do is to prove our strength with facts and eliminate their prejudices! ”

"With facts...... That is, do you want to give them a demo test directly? With our aircraft, a lap in SLD climatic conditions? ”

Now Yi Yuanhe is the most enthusiastic about the reciprocal recognition of regional aircraft, after all, this is directly related to whether the new boat 60 designed by him can have a good market:

"But in this case, we must make further improvements to the MA60, and the current design of the anti-icing system only considers the four types of capabilities in our new standard, that is, the average diameter of supercooled droplets is 100 microns, and the maximum diameter is not more than 200 microns."

Lin Guofan, who was sitting on the other side, also added:

"It's not just the planes, it's generally snowing if the humidity is high enough to form millimeter-sized droplets, so the SLD climate itself is hard to come by, even in the Great Lakes region, and now it's mid-February, and it's almost impossible to find a suitable test airspace in the country."

Yi Yuanhe hurriedly asked:

"In general, when will there be a climate that meets the requirements?"

"Basically, it's only three months from the end of October to the end of December every year."

Lin Guofan, who has been tracking the low-altitude meteorological conditions in China for 20 years, replied almost without thinking:

"And it's a matter of luck."

"But we can't wait another ten months, the revision of the airworthiness standards for SLD is an eyebrow-burning matter, and it will not be delayed until the end of the year."

"You don't have to wait until the end of the year, or rather, you don't have to wait for the naturally occurring SLD climate."

Seeing a few other people, you have already refined the most critical issues with one word, and Chang Haonan went straight to the topic:

"If there are no conditions, we can create conditions, and we can artificially create an environment that meets the requirements."

If you leave it at the usual time, you should already be talking about this idea.

But all of you sitting here, at least all the technicians, have seen Chang Haonan's ability in solving the problem of icing on the wings of the Y-8.

Not only have wild ideas, but also have the ability to turn ideas into reality.

So everyone was waiting for him to give further explanations.

Chang Haonan stood up, pulled out a blackboard placed in the corner of the conference room, and then drew a stick figure on it.

An airplane, dragging a long hose.

When he was done, he gently tossed the chalk into the box next to him and turned around.

Although it is very abstract, people here can still recognize it, it should be a H-6.

"We can retrofit a Boom 6 as an ice jet specifically designed to simulate an ice cloud test environment."

"Because the original design was quite mature, there was no need to retest the aerodynamic part of the aircraft, just replace it with some new equipment."

"For example, the original oil storage tank is changed to a water storage tank, the engine pressurized air is introduced as the air source, and the original refueling cone sleeve is changed into a set of plane nozzle arrays, and the pressure air and water flow from the air and water system are distributed and supplied to the air and water nozzles of each nozzle, so that the water is atomized and supercooled water droplets are formed in the external low temperature environment, so as to achieve the purpose of artificial ice clouds."

"The only problem with this improvement is that the volume of the bombardment 6 is still too small, the water storage is not large enough, I calculated, a take-off can only work for a maximum of 20 minutes, and it is a bit short for those icing subjects that need to be tested for a long time, but the SLD test is originally a short period of high-intensity icing, so ...... Totally sufficient! ”

"The core of the whole renovation project is the sprinkler array, according to my personal experience, it is temporarily set as a multi-layer array composed of multiple two-fluid micro-mist nozzles, the crossbar is a double-layer nested gas and water pipeline, the profile is circular, the middle keel rod and the frame rod on both sides are only used as a support structure, and the profile is elliptical, as for the specific array parameter setting......"

Chang Haonan lowered his head and calculated the difficulty of calculating this problem:

"Give me two to three days, and I should be able to get the design results."

(End of chapter)