The interior of the cargo plane is like that, empty, there is nothing to see, but a group of leaders are walking around inside, the inside of the plane is flat, the floor is made of wood, and below is the pipeline pipeline, fuel tank oil pump and so on.

A group of leaders stood at the door of the cabin, imagining a cannon and a burst below, finally knowing why the wings were placed on it.

If you want to talk about the real combat effectiveness of armed transport aircraft, there are not much, after all, now there are all kinds of anti-aircraft weapons.

It's like the South China Sea, if you want to occupy the island, then I will fly twice a day and hit the ground twice.

Do you still put warships in this place every day?

You build air defense facilities on islands?

Then I was patrolling the sea, and when I saw your boat, I suddenly flew away, who would dare to come to this place to fish?

It's impossible for your warship to escort the fishermen, right?

The leaders of the aviation department immediately thought of many ways, as long as they guaranteed sufficient deterrence or as long as they ensured that my plane flew around it every once in a while, that was my territory.

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

Bangs did a power-on test here, and then dragged the plane to the runway on this side of the small plane.

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

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

These two pilots were also surprised when they came here, they had never seen this kind of aircraft?

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

But when I came to the scene, this was a ghost C46 transport plane, when we hadn't flown a C46 transport plane, right?

There is no shadow of C46 on the whole body, and because it is an upper single-wing structure, the fuselage looks thicker.

Because the wings have been enlarged, the fuselage looks a little shorter.

The visuals give people a chubby feeling, and now the two pilots are in the cockpit, looking at various instruments.

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

This is required by the bangs, and all meters have a line of Chinese on them.

The two pilots listened to the careful introduction of bangs while holding the flight manual.

Conduct ground tests, and also let two pilots operate, mainly to control the wings, rudder surface, etc.

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

Ground tests also involve starting the engine and taxiing over the runway.

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

Because there was no silencer or anything like that, it was loud, and because it had just been activated, there was a puff of blue smoke.

After one side of the engine is started, then the other side of the engine is started.

The two test pilots carefully observed the instrument, and then began ground tests under the guidance of bangs.

The plane circled around the runway before Liu Hai got off the plane and let the test pilot continue to master the plane.

"Xiao Liu, how's it going?" After the bangs came down, they came to the place where the leaders watched, and when the leaders saw the bangs coming down, they quickly came up and asked.

"There will also be one to two days of ground tests, on the one hand, to familiarize the test pilots with the control of the aircraft, and on the other hand, to test the various systems." Bangs spoke.

There are no intelligent driver assistance systems at present, so there is no need for long-term ground tests to optimize the flight control system.

Many modern aircraft have intelligent assistance systems, as well as autopilot systems.

These are part of the flight control system, and the flight control system must first be continuously tested and optimized on the ground.

In general, it takes 3 to 6 months of ground tests to validate the flight control system, and 3 to 6 months of test flights to test and optimize the flight control system.

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

Some aircraft even discovered some major flaws after the completion of experiments, and then had to change the relevant design.

After the relevant design changes, the ground tests and flight tests had to be restarted.

So there is a reason why some aircraft have been tested for many years before they can be mass-produced.

If it's unlucky, several demonstrators will have to be built to complete mass production.

With the complex structure of a modern aircraft, it is already good to be able to find defects before the tests are completed.

Just like a famous airliner in later generations, his software conflict was discovered by disaster.

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

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

However, its flight control system was not reflected, which led to human operation and intelligent control, just like twisting a twist one to descend and one to fly up, which eventually led to a disaster.

The shape of this plane is a bit like the An-32, but the big brother of this plane has not yet started research.

Of course, it's just the appearance, and the rest can't be compared at all, because others use turboprop engines, which are not as strong as others in terms of speed and manufacturing technology.

But now the country simply does not have the technical strength to manufacture turboprop engines.

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

When the leaders heard Liu Hai's explanation, they nodded one after another, and even the leaders of the aviation department couldn't say anything about Liu Hai, because they could independently design and manufacture a new aircraft, which was already a person that the leaders did not dare to question.

If you want to say that Bang Hai imitates an airplane, the leader can still say a few words, poor leader, do your homework on C46, but come to the scene to take a look?

I don't have the opportunity to speak by myself, so I have to be careful when I speak, for fear of being told that I don't understand.

"And the airliner version?" A leader asked again at this time.

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

"Leader, passenger aircraft is still more troublesome, passenger aircraft for the overall tightness, temperature control system, oxygen system, noise reduction system, and toilet and so on."

"That is, people sit inside, and they can't hear the noise outside like a cargo plane, otherwise passengers can't stand the long-term ride, and the other version will take about three months." Liu Hai opened his mouth to give the leaders a general explanation.

When the leaders heard that it was still so complicated, they also nodded, didn't say anything, and looked at the outside being controlled by someone to conduct a ground test.

The photographer who followed the photographer who took the photo took a hard shot at the plane, which was designed and built by our own country, and it will definitely be announced later.

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

The bangs went up again, and the rest of the leaders looked at the back of the bangs, and they were also full of emotion.

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

"It's not easy to be able to adapt to all-terrain cargo aircraft."

"Old Sun, you have to prepare for mass production."

"Leaders rest assured." When Sun Aiguo heard this, his mouth cracked open with laughter.

Of course, the reason why mass production has not been approved now is because there is still a test, and it is estimated that it will take 1 to 3 months to conduct the experiment, fly all over the country, and then carry out the load experiment, the load long range test.

It takes at least 300 hours to make a decision.

This test plan was also developed by Liu, which was based on the test process of modern aircraft later, and a part of it was streamlined.

The maintenance of the piston engine is also relatively simple, but it still has to follow the process.

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

Bangs still use maintenance cards, that is, to maintain the contents on the card, the ground staff must check them one by one, and then record them.

This is the stupidest way, but it is also the safest way, and many times the disaster of the plane is caused by the carelessness of the ground crew.

The famous DC 10 series, except for the first aircraft caused by the failure of the hydraulic system in the cargo compartment, the back is basically man-made, of course, how did this man come about, look at whose plane is behind, a monopoly will know.

The next day, Liu Hai continued to track the ground tests, and today the leaders did not come.

On the fourth day, the plane was towed to the airport runway farther away, and the runway of the small plane was not long enough, and 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 behind.

That's right, now the motorcycle factory is so huge, along the road at the entrance of the motorcycle factory, one side is all the factory area of the motorcycle factory, and the other side is hundreds of supporting factories.

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

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

There are also rescue vehicles prepared next to it, as well as fire trucks, and now fire trucks.

On the orders of the tower, the aircraft began its first test flights.

The landing gear was not retracted on the first test flight, and the first test flight lasted no more than ten minutes.

And the refueling for the first take-off is very limited.

This was also the case in later aircraft tests, when the aircraft was tested and the tanker was waiting nearby.

Basically, the test flight is over, and there is not much fuel left after landing, so it is for safety.

The first test flight does not need to be pulled up sharply, it is just according to the normal take-off, and the piston engine is not much necessary to stretch rapidly, which is not comparable to the turbofan engine with afterburner.

When the plane flew up, it began to circle in the sky, and the leaders applauded.

Ten minutes later, the plane landed slowly, and the landing gear was not retracted.

Liu Hai and others hurriedly went up to check, which must be done, although it is a little complicated and a little delayed.

The instrument is normal in all places, and then the access port is opened, and all places are also normal.

After half an hour of busy work, the routine inspection is over, but in fact, the real routine inspection time is even shorter.

The second test flight, twenty minutes, still did not put away the landing gear.

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

The leaders just watched here for a day, and in this period, there were no achievements in the field of aircraft transport aircraft at all.

Historically, Yun VI was developed in 65 years and failed two years later.

The main reason is the blind lengthening of one meter, increasing the number of seats from 24 to 36.

Don't underestimate this meter, first of all, because of the weight change, you have to increase the fuselage structure.

And then the wing also has to change position.

The engine is certainly not enough either.

The pneumatic layout should also be changed.

But it's a pity that at this time, the level of our domestic aircraft manufacturing design is simply not enough to support such a large project.

It's not nonsense, you've lengthened by a meter, you've added seats, you've increased the weight of the body, and the original power of the engine is definitely not enough.

As for the next-generation Y-7, it is also a design with an eye above the top, although it has been tested in 70, but it did not successfully make its first flight until 86.

And because the economic situation was relatively good during this period, Yun 6 started the research in advance, and then the project failed earlier this year.

The reason for the failure is exactly the same, the fuselage is lengthened, the dynamic balance between the wing and the fuselage is completely broken, the wing position does not change, the plane cannot fly at all, and the power system and so on.

So the c46 that Liu Hai changed, although it is no longer the same as the original, but this is the only seedling at this stage.

The person in charge of the aviation department was also distressed when he thought of the 10 million invested in failure, and looked at the plane that took off in front of him, and he was even more impressed by the bangs.

Today's trials are over, and tomorrow long-range trials begin.

The progress of the experiment is arranged by bangs, and it is completed one by one according to the experimental subjects.

"Comrade Xiao Liu, is it considered a success?" Later in the afternoon, when today's test flight course was over, the leaders came up to ask bangs.

"It's not a big problem, it should be a small problem in the future, but I can't guarantee it, it's better to talk about it after a long-range load test." Bangs don't dare to guarantee it, but at the moment, it doesn't seem to be a big problem, after all, it is a propeller engine with a relatively low speed.

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

"That's it, that's 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 feel that there is not much problem in producing a few more, after all, the last failed aircraft project invested 10 million failed, and there is no 10 million here.

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

"Absolutely." Bangs nodded.

This kind of aircraft is not a big problem, as long as there is no structural problem, some small problems in the back are also easy to change.

The next morning, Liu Hai was going to carry out a load test today, and the loading of the aircraft cargo compartment could not be like a truck, and it had to be counterweighted, so Liu Hai had to keep an eye on it.

"Xiao Liu, I just heard a news yesterday that in the past two years, the superior department invested 10 million in the research and development of new aircraft, but it failed in the last two months." Sun Aiguo was mysterious and secretive, and said to Liu Hai in a low voice.

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

"10 million, how much money did we use?" Sun Aiguo shook his head, and at the same time knew the value of the plane with bangs.

"Factory director, you can't say that, failure is also experienced." Bangs shook his head and said.

"You're right, I didn't ask what was going on, let's just be our own." Sun Aiguo will definitely not take the initiative to ask these things, after all, each department is different.

And Sun Aiguo is also afraid that after asking, it will be like a cat grabbing glutinous rice cakes and grabbing them in his hands.

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

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

Aircraft loading requires the guidance of professional personnel, and it is not random to load, in modern aircraft loading, it is a lump by piece, mainly for counterweight.

When Liu Hai was here to guide the loading, the superior leaders were listening to the report of the plane incident.

"Because Lao Sun said that it was an imitation of the C46 transport aircraft, we did not report it in advance, but two days ago we went to the scene to see that it was completely a newly designed aircraft."

"The design parameters of the aircraft are still very good, and the flight test is underway, and the complete data can be seen within three months."

"However, according to what we know about Xiao Liu, we should not exaggerate the parameters."

The superior leaders carefully looked at the design parameters of the aircraft and listened to the report below.

"This Comrade Xiao Liu is really talented." The higher-ups also knew why Liu Hai changed the C46 transport plane to the way it is now, in order to add weapons to the plane.

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

"Can be converted into an armed patrol aircraft!"

"With the combined fuel tank, it can reach 4,000 kilometers, and the entire South China Sea is under our patrol."

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

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

"In winter, you can also transport supplies to the plateau, which is lower than the cost of car transportation."

Although it is said that the development of automobiles in the mainland is good, it is even more difficult to get to the plateau after all, after all, it is so far.

And with this kind of transport plane, there is not much problem in running back and forth on the same day.

This is very important, and the key is that it can also transport people and all kinds of equipment.

"Comrade Xiao Liu is good, I didn't expect to put a cannon battle." Of course, the superiors know how important the transport plane is for our rapid response.

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

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

And the superior leadership also knew about the failure of the previous project of the aviation department, so that it is more contrasting at a glance, of course, now the full test results have not yet come out, but being able to fly in the sky for an hour has proven a lot of problems.

"When it was successfully mass-produced, I went to see for myself." The superior leader finally spoke.

After the end of the load test on this day, there is no need to stare behind the bangs, and the loading of goods behind is calculated according to the current process.

Bangs also have to design the passenger plane, the airliner is a sealed cabin, which needs to be pressurized, the overall structure of the aircraft remains the same, but a lot of things need to be added inside, and the cargo plane is actually sealed, but there is only one layer of sealing, and it is not pressurized.

The passenger aircraft is double-sealed, so as to increase the airtightness, in addition to the cabin wall to add some noise reduction and insulation things, internal oxygen system, lighting system and flight attendant workshop and so on.

Although it is said that this kind of small aircraft can not be arranged with these, the bangs are still arranged, which is to prepare for the larger aircraft later.

Now there are more workshops for bangs, and small planes are no longer produced at all, and all cargo planes are produced.

Aircraft test bangs should also be stared at, and flight test data should be looked at every day.

"Section Chief Liu, we want to take the risk of conducting the final long-range heavy-load test." On this day, Liu Hai had just arrived at the airport, and two test pilots found Liu Hai.

When Liu Hai heard this, he asked, "Do you know that the most dangerous thing is yourself?" ”

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

"There are not many planes in our Air Force, and the Y-5 is already a lot behind, and we are not afraid of danger." The two test pilots of the Air Force nodded.

"I agree!" Bangs also felt that there was no big problem, so they agreed.

Of course, this matter has to be reported to the factory director, and after Sun Aiguo heard the report, he directly agreed, and then reported to the superior department.

The higher authorities quickly agreed, and the test flew directly to the southwest, almost 1,500 kilometers in a straight line.

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

By the time the plan was completed on the higher authorities' side, the factory side was ready for the final inspection, and this time there would be two ground staff members together.

This time the load is 4.5 tons, and of course all the airfields along the way will be put into combat readiness this time.

The higher authorities also sent photographers to record the whole process of this long-range heavy-load test.

It took a lot of courage to watch the plane take off, and then go back to do your own thing, the drawings of the airliner were not yet fully done.

This time, the higher authorities are also very concerned about the aircraft, this long-range and heavy-load test, if this test is successful, it means that this aircraft is successful.

The reason why the test pilots dare to fly in advance is that they are actually sure of the aircraft, and the hydraulic control system greatly reduces the physical consumption of the pilot.

The superior leaders kept listening to the reports, and the radio on the plane was also constantly communicating with the ground towers.

Flight altitude, flight speed, and the current state 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 anxiously waiting, since receiving the notice that our latest domestic design of the aircraft, to carry out the test landing at this airport, the person in charge of the airport feels very excited, and a little anxious.

Tomorrow continues today to go to the hospital for physical treatment of the waist.

(End of chapter)