The runway test is a pre-flight inspection, which allows you to roughly analyze the performance of the aircraft at different speeds on the runway, especially the shortest take-off distance.

A total of three rounds of testing were conducted, and in the last round, when the two engines were at full power and burst out with a full 100 tons of thrust, the whole transport plane felt like a small fighter jet and quickly flew past.

It only took three hundred meters, Wu Shifeng and Sheng Hui clearly felt that the lift of the plane had reached a certain critical point, and they began to have a tendency to look up, so they hurriedly reduced the engine output and did not let the plane really take off.

Seeing the data fed back from the test, Dong Jun couldn't help but exclaim: "This kind of large transport aircraft can achieve a take-off distance of 300 meters...... A hundred tons of thrust is really terrible! ”

You must know that the previous Y-20 with an empty weight of 154 tons, the shortest take-off distance is more than 600 meters,

Now, with the empty weight reduced by 40 tons and the total thrust increased by more than 3 times, this distance has been cut in half!

Chi Jinliang couldn't help but exclaim: "If there is a miniature airport at this distance, it can take off and land!" ”

The reduction of take-off and landing distances means that there will be a lot of airports suitable for Y-20S in the future, especially many islands and reefs in the South China Sea are too small, even if they reclaim land, they can only build a small airport, and they have not been able to take off and land large aircraft.

However, with the emergence of Y-20S, the strategic position and role of these islands and reefs will be rapidly improved!

"Call Kunpeng, the runway taxiing test is over, please slide into the hangar."

"The ground crew will check the runway again, and there will be a special plane landing in half an hour."

With the end of the test, the sky has begun to gradually darken, and an hour later, a small civil airliner slowly landed at the west flight test field in the night.

The military paid very much attention to the test flight of the Y-20S this time, and three weight leaders came at one time, and the parent company of Xifei, Aviation Industry Group, was no exception.

At the same time, there are also leaders and engineers of COMAC, who are also invited to visit the test flight, which is actually an advertisement for Kangchi, and after COMAC sees the power of the turbofan 30 with his own eyes, he will be more active in paying money in the future......

After getting off the plane, Chief Shen even saved the greeting process, and directly pulled Dong Jun and asked, "Where is the plane now?" Hurry up and give us a sneak peek! ”

So under the leadership of Dong Jun, everyone soon saw the protagonist of this test flight.

"Hmm...... Isn't this Yun 20? ”

When I saw the Y-20S quietly parked in the hangar, many people were actually a little disappointed.

Because the overall shape of the Y-20S is similar to the previous Y-20, its most obvious difference is that it has changed from the original four engines to two, and then the size of the landing gear has become larger.

Other than that, there's nothing special about it at all.

Of course, people like Kangchi who know the details of the specific changes will definitely not think so.

Yun 20S actually has a big change that can't be seen just by looking at the appearance, that is, the carbon fiber material of the entire fuselage has been replaced with T1200, which greatly enhances the overall strength of the fuselage, otherwise with the previous fuselage material, it will not be able to withstand such a large thrust engine at all.

At present, the empty weight of the Y-20S has been reduced from 154 tons to 114 tons, and the thrust-to-weight ratio has increased from 0.415 to 0.877!

So don't look at it, the shape seems to be similar, but the actual performance will definitely be very different!

Faced with the disappointment of individual leaders, Dong Jun and Kang Chi just glanced at each other without any justification.

Anyway, no matter how much they talk about technology, they may not understand it.

When the plane flies, they can directly feel how big the difference is.

Nothing to say all night,

Early the next morning, Kang Chi, who had breakfast, and Cai Yaobin came to the test flight site together, and Dong Jun and others had already begun to make preparations.

Although Kangchi provided the engine and improvement scheme, it basically did not participate in the subsequent manufacturing and research process, so the test work was mainly directed by Dong Jun, who simply came to witness the first flight.

He is also looking forward to how amazing the performance can be with the new heart 20.

By the time the leaders arrived, the plane had taxied to the end of the runway and was ready to go.

The test pilots are still yesterday's Wu Shifeng and Sheng Hui.

On the tower, Chief Shen briefly observed the planes on the runway through the telescope, and then nodded to Dong Jun: "You guys start." ”

"Hmm."

"This is the tower, call Kunpeng."

"Kunpeng received, please instruct."

"The preparations for the first flight test have been completed, and you can start taking off." After Dong Jun finished speaking, he added,

"Fly the way you did yesterday's third run!"

Wu Shifeng knew what Dong Jun meant as soon as he heard it,

And that's exactly what he wants.

With such a powerful heart, if the first flight was just a conservative long-distance run, how boring it would be.

Wu Shifeng directly pushed the throttle valve to the upper middle, and the afterburner will automatically open at this gear, so the two turbofan 30 suddenly began to make a huge roaring sound, and the huge tail vent gradually appeared red high-temperature tail flame.

After confirming that the speed was normal, Wu Shifeng finally let go of the brakes, and the fuselage that had been gathering momentum for a long time suddenly began to accelerate and slide wildly like a wild horse.

At the same time, Wu Shifeng held the hand of the throttle valve, and was still slowly pushing forward, finally pulling the power to the fullest!

Boom –

With the roar of the engine, this hundred-ton transport plane seemed to have just started for a few seconds, and it didn't even reach a tenth of the runway, and the nose of the plane began to rise off the ground, and then quickly soared into the sky!

Seeing such a shocking picture, everyone suddenly felt a little numb in their scalps, and they couldn't even speak in surprise for a while.

"This ...... What is the take-off distance in meters? ”

"Five hundred meters?"

"Absolutely not, this distance feels like a maximum of four hundred meters!"

"That's more than 300 meters?"

"How is this possible? Fighter planes have to run a distance of more than 300 meters, this is a large transport aircraft! ”

"C17 seems to be able to achieve a minimum take-off and landing of more than 300 meters."

“……”

The picture is completely beyond the scope of normal cognition, and makes them subconsciously feel that this is simply a dream......

But the roar of the engine, which still lingers in their ears, reminds them that this is what is really happening!

"Maybe it's empty, and then the wings are bigger?"

"No, the wings are exactly the same size as before." Dong Jun finally couldn't help but speak,

"In addition, I would like to report to the leaders that the shortest take-off distance of the 20S just now, the accurate figure is 263.1 meters!"

After hearing this accurate number, this group of military bigwigs was immediately not calm.

"! You've made a Kunpeng that's stronger than the C17? ”

"263 meters? You're not mistaken, are you? ”

"This distance...... If the deck of the aircraft carrier were bigger, it would be able to take off on the aircraft carrier! ”

(End of chapter)