A short take-off is just the beginning.

After taking off, Wu Shifeng immediately carried out a limit lifting action,

So a large aircraft weighing hundreds of tons, under the continuous power output of two engines,

Directly came to the wave of dry land to pull onions!

Looking at the horizontal angle displayed on the dashboard, the two test pilots thoroughly felt it today, what is the real vigorous flying brick!

They just took the big luck and drove out the feeling of a fighter jet!

If it weren't for the fear that the materials would not be able to support such a large plane, they would even want to fly a few super-maneuverable maneuvers......

“…… Current speed 900Km/h, 1000...... 1100…… 1200！ ”

After feeling that the fuselage began to tremble significantly, Wu Shifeng immediately reduced the engine power and slightly reduced the speed.

"Report the tower, the limit speed test is completed, the limit should be about Mach 1, just 990Km/h when the fuselage shakes is more serious, I didn't dare to break the sound barrier."

"The tower received it, and the test of the variable duct continues."

"Kunpeng received."

After ending the call with the tower, Sheng Hui said with a little regret: "It's a pity, the power performance of this engine is completely excessive, and supersonic speed is definitely not a problem." ”

Wu Shifeng nodded: "No way, the fuselage design is not designed for supersonic speed, such a large aircraft, forcibly breaking the sound barrier is easy to disintegrate and have an accident." ”

"How do I feel that this engine is not at all like the ...... developed for the Y-20"

"Originally, I heard Mr. Dong say that this verification machine was just temporarily rushed out to verify the engine, and the Kunpeng fuselage will be larger in the future, and there will be a giant Kunpeng with four or six rounds!"

"Giant Kunpeng?"

"Well, the Kunpeng is bigger than the C5 and An-225."

"it!"

Sheng Hui couldn't help but imagine that scene for a moment, and then he was so excited that he got goosebumps all over his body......

"I'm really looking forward to the day when it spreads its wings......"

……

The test items of the transport aircraft are much less than those of the fighter aircraft, and the overall test process is a bit similar to that of the civil airliner, mainly the take-off and landing distance, climb efficiency, acceleration ability, ultimate speed, fuel consumption test, etc.

These items can basically be tested in one flight.

Through the data of this round of testing, Dong Jun has roughly estimated that the maximum range of this turbofan 30 demonstrator can be about 20,000 kilometers without load, and the range with full load will be discounted.

Compared with the previous Yun 20, it has increased by 2.5 times!

When the volcano erupted in Tonga, the Air Force used Yun 20 to transport 33 tons of disaster relief materials, a flight of 10,000 kilometers, and landed three times to refuel at the airport, while the old M's C17 was only added once, and later mocked us a lot for this.

But in fact, the rescue operation was mainly for the sake of insurance and did not fly too much, and at the same time, in order to hurry, the most economical endurance speed was not used, otherwise it would be enough to pull a 33-ton cargo and add two times to the range of 20 full loads and 4,000 kilometers.

And if it is a 20S, pull a 33-ton cargo and fly 10,000 kilometers, and you don't even need to add oil once on the way!

Properly crushed in an all-round way!

Of course, this data needs to be verified by actual measurements in the future.

Two hours later, Kunpeng finally finished its aerial test and began to slowly approach the airport runway.

At the moment when the landing gear was grounded, Sheng Hui opened all the baffle doors of the engine, and the powerful reverse thrust brake made the bodies of the two immediately start to lean forward.

As soon as the plane stopped, the testers on the runway ran over and looked at the digital signs.

"197.6 meters?"

He rubbed his eyes in disbelief, and after taking a second look to make sure he hadn't seen the flowers, he picked up the walkie-talkie and reported: "The shortest landing distance of empty weight is 197.6 meters!" ”

", 160 yards and 200 meters of stopping? This is too perverted! ”

"Awesome!"

"What the hell is this fairy engine?!"

“……”

With the last result of the first round of testing, from the runway ground support to the logistics emergency support, from the cabin to the tower, the entire test flight site suddenly burst into thunderous applause, cheers, and exclamations one after another.

"Mr. Kang, Mr. Dong, congratulations."

Chief Shen was so excited that his face turned a little red, he held the hands of the two of them tightly, and said solemnly: "At the same time, on behalf of the country, I also thank you for your great contributions!" ”

The scene also resounded with thunderous applause.

"Chief Shen is polite."

"That's what we're supposed to do."

Kang Chi and Dong Jun hurriedly said with some surprise.

Immediately after the first round of testing, the test engineers began to collect and analyze the aircraft, check its condition, and refill it.

In fact, after a round of testing, the fuel tank was only used by 34%, but the next second round of testing was a load test, and the fuel tank naturally had to be full to be accurate.

After two hours of preparation, the Y-20S, loaded with one hundred and twenty tons of square pieces of iron, took off again.

A load of one hundred and twenty tons already sounds quite exaggerated.

But that's a bit conservative.

Yun 20 four engines, a total of 64 tons of thrust, can make a 154-ton aircraft take off after loading a maximum load of 66 tons,

Proportionally converted, the take-off limit of the Y-20S with a thrust of one hundred tons should be 343.75 tons.

Removing the dead weight of 114 tons means that its ultimate load is a full 229.75 tons!

But after all, it's only the first day of testing, and the load is not only based on the thrust-to-weight ratio, but also on the strength of the fuselage material, so for the sake of safety, Dong Jun still chose a relatively conservative number.

After loading hundreds of tons of iron, the speed of take-off is finally much normal.

After taxiing for about 600 meters, it slowly flew up, and this take-off distance was about the same as the unloaded take-off distance of the Y-20, and the landing results were still excellent, still controlled at more than 300 meters.

After the morning test, the leaders thought that the first flight test was over, but Kang Chi and Dong Jun smiled mysteriously, saying that there were surprises in the afternoon, and the leaders were kept.

This made the leaders' hearts suddenly look like 10,000 ants were biting, but seeing that Chief Shen was patient and didn't ask questions, others naturally didn't speak easily.

So the short two hours at noon made them feel like two months had passed, and they finally stayed up until two o'clock, and what they were waiting for was a minibus.

Chief Shen was a little puzzled and said, "This is ...... Need to change the testing venue? ”

Dong Jun nodded.

Chief Shen seemed to have guessed something, and his expression was suddenly a little moved.

The time for the transfer of the venue did not last long, about ten minutes later, the minibus stopped in a wilderness connected to the test flight base.

When everyone got out of the car and saw the simple dirt slope runway in front of them, as well as the Yun 20S parked on the runway in advance, all the guesses were verified at this moment!

"You really want to test the Yun 20S on this kind of dirt slope runway?!"

"Since it is a benchmark C17, and it has to be comprehensively leading, how can this test be missing." Dong Jun said with a smile,

"Mr. Kang gave me the improved design drawings at that time, and put forward this requirement for the landing gear of the Y-20S, and we have also carried out the preliminary verification of the landing gear here, with a new engine and a strengthened landing gear, our Kunpeng can also take off and land at the field airport!"

(End of chapter)