Courtyard light

Chapter 355 Long-range heavy-load experiment (second update)
The interior of the cargo plane is just like that, empty, with nothing to see, but a group of leaders are walking around inside. The interior of the plane is flat, with a wooden floor, and underneath are pipelines, fuel tanks, pumps, etc.

A group of leaders stood at the door of the cabin, imagining shooting machine guns down below, and finally understood why the wings were placed on top.

In terms of actual combat effectiveness, armed transport aircraft do not have much. After all, there are now a variety of anti-aircraft weapons.

Just like over there in the South China Sea, if you want to occupy the island, then I will fly twice every day and hit the ground twice.

Do you still put warships here every day?
You build air defense facilities on the island?
Then I will patrol the sea, and when I see your boat, I will make a sudden move. Who dares to come to this place to fish?

It's impossible for your warships to escort the fishermen, right?
The leadership of the aviation department immediately thought of many ways. As long as it ensures sufficient deterrence or as long as my plane flies around it every now and then, that is my territory.

As for places that are too far away, then everyone will do their own thing.

A power test was conducted on Liu Hai's side, and then the plane was towed to the runway on the small plane's side.

Because a series of ground experiments have to be carried out, mainly ground tests of the control system, it cannot take off yet.

Of course Liu Hai was not allowed to fly, so two pilots were transferred from the Air Force.

The two pilots were also surprised when they came here. Have they never seen such an aircraft?

When these two pilots arrived, they were told by their superiors that they were flying C46 transport aircraft.

But when I came to the scene, I saw that this was a ghost C46 transport aircraft. Is it true that we have never flown a C46 transport aircraft?

There is no trace of the C46 in the whole body. Because it has a high-wing structure, the fuselage looks thicker.

Because some of the wings have been enlarged, the fuselage looks shorter.

The visual effect gives people a chubby feeling. Now the two pilots are in the cockpit, looking at various instruments.

Unlike flying foreign aircraft, the instruments on this aircraft are all in Chinese.

This is required by Liu Hai, and there is a line of Chinese characters on all instruments.

The two pilots held the flight manual and listened to Liu Hai's careful introduction.

During the ground test, two pilots were also allowed to operate, mainly controlling the wings, rudder surfaces, etc.

Moreover, the hydraulic control system is more labor-saving than the wire control system.

The ground test also requires starting the engine and taxiing on the runway.

With a burst of sound, the aircraft engine on one side successfully ignited.

Because there is no muffler or anything like that, the sound is very loud, and it has just started, so a stream of blue smoke comes out.

After starting one engine, start the engine on the other side.

The two test pilots carefully observed the instruments, and then started the ground test under Liu Hai's guidance.

The plane circled around the runway before Liu Hai got off the plane, allowing the test pilot to continue to control the plane.

"Xiao Liu, how are you?" After the bangs came down, they came to the place where the leaders were watching. When the leaders saw the bangs coming down, they quickly came up and asked.

"There will be another 1 to 2 days of ground testing. On the one hand, the test pilots will be familiar with the aircraft control, and on the other hand, various systems will be tested." Liu Hai said.

There are no intelligent driving assistance systems now, so long-term ground tests are not needed to optimize the flight control system.

Many modern aircraft have intelligent assistance systems and automatic driving systems.

These are part of the flight control system. The flight control system must first undergo continuous testing and optimization on the ground.

Generally speaking, it takes 3 to 6 months of ground testing to verify the flight control system, and 3 to 6 months of test flight to optimize the flight control system.

Generally, it is very fast to complete the flight control system within one year after an aircraft lands.

In some aircraft, major flaws were discovered only after the experiments were completed, and then the relevant designs had to be changed.

After relevant design changes, ground tests and flight tests have to be started again.

Therefore, there is a reason why some aircraft have been tested for many years before mass production.

If you are unlucky, several verification machines will have to be built to complete mass production.

With the complex structures of modern aircraft, it would be good to be able to detect flaws before testing is completed.

Just like a famous airliner in later generations, its software conflicts were discovered only after disaster.

This software conflict is actually that the priority of the internal flight control is not reflected.

When human operation conflicts with the operation of the intelligent flight control system, there is a priority, that is, the priority of manual control is higher than that of the intelligent system. To be precise, it should be the auxiliary system.

However, its flight control system did not reflect this, which resulted in manual operation and intelligent control, just like twisting a twister to make one go down and the other to fly up, which ultimately led to disaster.

The appearance of Liu Hai's aircraft is a bit like the An-32, but Big Brother has not started studying this aircraft yet.

Of course, it's just the appearance, and the rest can't compare at all, because others use turboprop engines, and they are not as good as others in terms of speed or manufacturing technology.

But China currently does not have the technical strength to manufacture turboprop engines.

The overall aircraft structure of the turboprop is completely different from that of the piston engine.

When the leaders heard Liu Hai's explanation, they nodded one after another. Even the leaders of the aviation department couldn't say anything to Liu Hai, because he was able to independently design and manufacture a new aircraft. This was something that no leader dared to question. .

If Liu Hai imitates an airplane, the leader can say a few words. The poor leader has done all the homework related to the C46, ​​but when he comes to the scene to take a look?
I don’t even have a chance to speak, so I have to be careful when speaking, for fear of being said that I don’t understand.

"Is there a passenger version?" A leader asked again at this time.

After all, when Sun Aiguo reported, he said there were two versions: passenger and cargo. Now that the cargo plane has come out, the passenger plane should not be far away, right?

"Leader, passenger aircraft are still quite troublesome. Passenger aircraft have to deal with the overall sealing, temperature control system, oxygen system, noise reduction system, bathroom, etc."

"That is to say, people sitting inside cannot hear the noisy sounds outside like cargo planes. Otherwise, passengers will not be able to bear it for a long time. Another version will take about three months." Liu Hai opened his mouth to explain to the leaders. Ichiban.

When the leaders heard that it was still so complicated, they nodded and said nothing. They looked at the aircraft being controlled outside for ground tests.

The photographer who was taking the photo with him took a sharp photo of the aircraft. This aircraft was designed and built by our country, and it will definitely be announced in the future.

The leaders watched for a long time until the plane stopped and began routine maintenance.

The bangs went up again, and the other leaders looked at Liu Hai's back and were filled with emotion.

"Comrade Xiao Liu is really an all-rounder!"

“It’s not easy to have a cargo aircraft that can adapt to all terrains.”

"Old Sun, you must be prepared for mass production."

"Don't worry, leaders." Sun Aiguo burst into laughter when he heard this.

Of course, the reason why mass production has not been approved now is because it still needs to be tested. It is estimated that it will take 1 to 3 months of testing. It will fly around the country, and then carry out load tests and long-range load tests.

It will take at least more than 300 hours of flying before a decision can be made.

This test plan was also formulated by Liu Hai. Liu Hai streamlined part of it based on the subsequent test procedures of modern aircraft.

Maintenance of piston engines is also relatively simple, but you still have to follow the procedures.

The people who maintain the aircraft are still skilled workers in the factory because they are very familiar with the structure of the aircraft.

Liu Hai still uses maintenance cards, which means that the ground staff must check the contents on the maintenance cards one by one and then record them.

This is the stupidest way, but it is also the safest way. Many aircraft disasters are caused by the carelessness of ground staff.

The famous DC 10 series, except for the disaster caused by the failure of the hydraulic system of the cargo hold on the first aircraft, the rest are basically man-made. Of course, where did this man-made effort come from? Let’s see whose aircraft is behind. One family dominates the other. Just know.

The next day, Liu Hai continued to follow the ground test. Today, the leaders did not come.

On the fourth day, the plane was towed to the airport runway farther away. The runway of the small plane was not long enough. A longer runway was needed to ensure safety during the official test flight.

Liu Hai looked at the four-kilometer runway and roughly estimated his current position, which should be outside the fifth ring road at the back.

Yes, the motorcycle factory is so huge now. Along the main road in front of the motorcycle factory, one side is all the motorcycle factory area, and the other side is hundreds of supporting factories.

This runway also belongs to a motorcycle factory. The entire length of the runway is four kilometers long, and it looks far and straight.

The leaders are here again today, because today is the official start of test flight.

There were also rescue vehicles and fire engines, now fire engines, prepared nearby.

Under the command of the tower, the aircraft began its first test flight.

The landing gear will not be retracted during the first test flight, and the first test flight will last no more than 10 minutes.

Moreover, the amount of fuel required for the first takeoff is very limited.

This was also the case in later aircraft tests. When the aircraft was undergoing test flights, the tanker truck was waiting nearby.

Basically, after the test flight is over, too much oil will not be left after landing. This is for safety.

There is no need to pull up quickly during the first test flight, just take off normally. Besides, there is no need to pull up the piston engine rapidly, and it cannot compare with the turbofan engine with afterburner.

When the plane took off and began to circle in the sky, the leaders applauded.

Ten minutes later, the plane landed slowly without retracting the landing gear.

Liu Hai and others hurried up to check. This was necessary, although it was a bit complicated and time-consuming.

All parts of the instrument are normal, and then the inspection port is opened, and all parts are also normal.After half an hour of busy work, the routine inspection is over. In fact, the real routine inspection time is shorter.

After 10 minutes of the second test flight, the landing gear still did not retract.

After landing, I checked as usual, refueled, and retracted the landing gear smoothly this time.

The leaders have been watching here for a day. In fact, during this period, we have made no achievements at all in the field of aircraft transport aircraft.

The historical Yunliu was developed in 65 and ultimately failed two years later.

The main reason is to blindly lengthen it by one meter and increase the number of seats from 24 to 36.

Don't underestimate this meter. First of all, the fuselage structure must be enlarged because of the weight change.

Then the wings also change position.

The engine is definitely not enough either.

The aerodynamic layout also needs to be changed.

But it is a pity that our domestic aircraft manufacturing and design level at this time is simply not enough to support such a large project. Historically, after two years, the engine was said to be lagging behind and stopped.

This is no nonsense. You have lengthened it by one meter, added seats, and increased the weight of the aircraft. The original power of the engine is definitely not enough.

As for the next-generation Y-7, it is also a design that puts its eyes higher than its top. Although it was tested in 70, it did not successfully make its first flight until 86.

Because the economic situation was relatively good during this period, Yun 6 started research ahead of schedule, and then the project failed earlier this year.

The reasons for the failure are exactly the same. When the fuselage is lengthened, the dynamic balance between the wings and the fuselage is completely broken. If the position of the wings is not changed, the aircraft will not be able to fly at all. There are also power systems and so on.

Therefore, the c46 modified by Liu Hai, although the modification is no longer like the original, is the only one at this stage.

The person in charge of the aviation department was heartbroken when he thought about the 1000 million invested in the failure. Looking at the plane taking off in front of him, he looked at Liu Hai with admiration.

Today's test is over, and tomorrow the long-range test will begin.

The progress of the experiment was arranged by Liu Hai and was completed one by one according to the experimental subjects.

"Comrade Xiao Liu, is this considered a success?" Later in the afternoon, after today's test flight ended, the leaders came up to ask Liu Hai.

"It's not a big problem. It should be a minor problem in the future, but I can't guarantee it. It's best to go through the long-range load test before talking." Liu Hai can't guarantee it, but for now, it doesn't seem to be a big problem. After all, it's just a speed. Relatively low propeller engine.

"Comrade Xiao Liu, you have made a great contribution."

"Yes, this is our only hope at this stage."

"My suggestion is to produce a few more."

"I think so too. Isn't it just some cost?" These leaders think that there is not much problem in producing a few more aircraft. After all, the last failed aircraft project failed after investing 1000 million yuan. There is no way we can get 1000 million yuan here.

Of course Sun Aiguo is willing to build more aircraft, but he still has to listen to Liu Hai's opinion. After all, Liu Hai is a professional.

"Of course." Liu Hai nodded.

This kind of aircraft does not have major problems. As long as there are no structural problems, minor problems can be easily corrected later.

The next morning, Liu Hai was going to carry out a load test today. The loading of the aircraft cargo bay cannot be like that of a truck. It must be counterweighted, so Liu Hai had to keep an eye on it.

"Xiao Liu, I just heard the news yesterday. In the past two years, the superior department invested 1000 million in the research and development of new aircraft, but it failed in the last two months." Sun Aiguo said to Liu Hai in a mysterious voice.

"Really?" Of course Liu Hai knew that such a thing was happening, but the factory director still had to pretend to be surprised when he said it.

"1000 million, how much did we spend just now?" Sun Aiguo shook his head and knew the value of Liu Hai's plane.

"Director, you can't say that, you have experience in failure." Liu Hai shook his head and said.

"What you said is right. I didn't ask what happened specifically. We just do our own thing." Sun Aiguo would definitely not take the initiative to ask about these things. After all, each department is different.

Moreover, Sun Aiguo was afraid that after asking, he would be like a cat catching a glutinous rice cake, catching it in his own hand.

As the person in charge of the factory, Sun Aiguo certainly knows the style of some departments and organizations.

In addition, at this special time, Sun Aiguo will definitely not provoke people from other departments, only the talents in his own factory can be trusted.

Aircraft loading requires the guidance of professional personnel, and it is not done casually. In modern aircraft loading, it is just a lump of stuff, mainly for counterweight.

While Liu Hai was here guiding the loading, the superior leaders were listening to the report on the aircraft incident.

"Because Lao Sun said it was a replica of the C46 transport aircraft, we did not report it in advance. As a result, when we went to the scene two days ago, we found that it was a completely newly designed aircraft."

"The design parameters of the aircraft are still very good. Flight tests are ongoing and complete data will be available within three months."

"But based on our understanding of Xiao Liu, we shouldn't exaggerate the parameters."

The superior leader carefully looked at the design parameters of the aircraft while listening to the report below.

"This Comrade Liu is really talented." The superior leaders also knew why Liu Hai changed the C46 transport aircraft into what it is now, just to install weapons on the aircraft.

Of course, various departments below also put forward their own ideas.

"Can be converted into an armed patrol aircraft!"

"With the addition of a combined fuel tank, the range can reach 4000 kilometers, and the entire South China Sea is under our patrol."

"It can also transport supplies to the islands and reefs in the South China Sea much faster than shipping, and the cost of using this aircraft is lower than that of ships."

"It can also be developed into an anti-submarine aircraft."

"In winter, supplies can also be transported to the plateau, and the cost is even lower than car transportation."

Although the development of automobiles in the mainland is good now, it is still a long way to reach the plateau, and it is even more difficult in winter.

There is no big problem in using this kind of transport aircraft to make a round trip on the same day.

This is very important. The key is that it can also transport people and various equipment.

"Good job Comrade Xiao Liu, I didn't expect to set off a big firecracker." Of course the superior leaders know how important the transport aircraft is to our rapid response.

Although the speed of this aircraft is not high, it flies in a straight line.

As long as there are enough aircraft, more supplies and troops can be transported.

Moreover, the superior leaders also knew about the failure of a previous project in the aviation department, which makes it more comparable. Of course, the complete test results have not yet come out, but being able to fly in the sky for an hour has proved many problems. .

"When mass production is successful, I will go and see for myself." The superior leader finally said.

After this day's load-carrying experiment is over, there is no need to stare behind the bangs, and the loading of goods behind will be calculated according to the current process.

Liu Hai also needs to design a passenger aircraft. Passenger aircraft have a sealed cabin and need to be pressurized. The overall structure of the aircraft remains unchanged, but a lot of things need to be added inside. Cargo aircraft are also sealed, but only have one layer of sealing and are not pressurized.

Passenger aircraft are double-sealed to increase air tightness. In addition, some noise reduction and insulation materials, internal oxygen systems, lighting systems, flight attendant workspaces, etc. must be added to the cabin walls.

Although this kind of small aircraft does not need to arrange these, Liu Hai still arranged them in preparation for the larger aircraft later.

Now Liu Hai is responsible for even more workshops. It no longer produces small aircraft at all and only produces cargo aircraft.

You should also keep an eye on the aircraft test bangs and read the flight test data every day.

"Chief Liu, we want to take the risk to conduct the final long-range heavy-load test." As soon as Liu Hai arrived at the airport that day, two test pilots found Liu Hai.

When Liu Hai heard this, he asked, "Do you know that the most dangerous person in this is yourselves?"

"Chief Liu, we know, but we need this kind of transport aircraft even more. If we can complete the test in advance, we can equip this kind of aircraft earlier and alleviate the pressure on our domestic aviation."

"Our Air Force does not have many aircraft to begin with, and the Y-5 is already far behind. We are not afraid of danger." Two Air Force test pilots nodded.

"I agree!" Liu Hai also felt that there was no big problem, so he agreed.

Of course, this matter had to be reported to the factory director. After hearing the report, Sun Aiguo directly agreed and then reported it to the superior department.

The superior department quickly agreed, and this test flew directly to the southwest, a straight-line distance of almost 1500 kilometers.

After a short overhaul and refueling in the southwest, we flew to the plateau, then flew from the plateau to the northwest of the Yellow River, and finally returned to Kyoto.

When the higher-level department's plan is completed, the factory is ready and has carried out final inspections, and this time there will be two ground crew members with them.

This time the load is 4.5 tons. Of course, all airports along the way will be on combat readiness this time.

The superior department also sent a photographer to record the entire long-range heavy-load test.

This requires a lot of courage. Liu Hai watched the plane take off and then turned back to do his own thing. The drawings of the passenger plane were not yet completely completed.

The higher-level departments are also paying great attention to the aircraft this time. This long-range heavy-load test. If the test is successful, it means that this aircraft is successful.

The reason why the test pilots dared to fly in advance was that they were actually confident about the aircraft. The hydraulic control system greatly reduced the pilot's physical exertion. In the past, when hinge wire control was used, it all relied on the pilot's brute force.

Superior leaders continued to listen to the reports coming in, and the radio on the plane also continuously communicated with various ground towers.

Flight altitude, flight speed, and the current status of the aircraft.

Many people are paying attention to this test, and at the airport in the southwest, the local person in charge has been waiting anxiously. Since receiving the notice that our latest domestically designed aircraft will be tested and landed at the airport here , the person in charge of the airport felt very excited and a little anxious.

　I will continue tomorrow and go to the hospital for physiotherapy on my waist today.

　　
　
(End of this chapter)