Chapter 283 New Kunpeng, take off!
Chapter 283 New Kunpeng, take off!
The taxi test is an inspection before the formal test flight. By testing the state of the aircraft at different speeds on the runway, the various performances of the aircraft can be roughly analyzed, especially the shortest take-off distance.
A total of three rounds of tests were conducted. In the last round of tests, when the two engines were fully powered and burst out with a full 100 tons of thrust, the entire transport aircraft felt like a small fighter and rushed over quickly.
It only took 300 meters for Wu Shifeng and Sheng Hui to clearly feel that the lift of the aircraft had reached a certain critical point and began to have a tendency to lift its head, so they quickly reduced the engine output power and did not let the aircraft really take off.
Seeing the data from the test, Dong Jun couldn’t help but exclaimed: “This large transport aircraft can actually take off at a distance of 300 meters… A thrust of 100 tons is really terrible!”
You should know that the previous Y-20 with an empty weight of 154 tons had a shortest take-off distance of more than 600 meters.
Now that the empty weight has been reduced by 40 tons and the total thrust has been increased by more than 3 times, this distance has been cut in half! Chi Jinliang couldn’t help but exclaimed: “If there is a micro-airport at this distance, it can take off and land!”
The reduction in take-off and landing distance means that there will be many airports suitable for the 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 small airports, and they have never been able to take off and land large aircraft.
But with the emergence of the Y-20S, the strategic position and role of these islands and reefs will be rapidly improved! “Calling Kunpeng, the runway taxi test is over, please taxi into the hangar.”
”The ground crew will check the runway again, and a special plane will land in half an hour.”
As the test ended, the sky began to darken. An hour later, a small civil airliner slowly landed at the Xi’an Aircraft Test Flight Airport in the night.
The military paid great attention to the test flight of the Y-20S. Three heavyweight leaders came at once, and the parent company of Xi’an Aircraft, Aviation Industry Corporation of China, was no exception.
At the same time, leaders and engineers from COMAC were also invited to visit the test flight. This was actually an advertisement for Kangchi. After COMAC saw the power of the WS-30, they would be more willing to pay for it in the future…
After getting off the plane, Chief Shen skipped the greetings and asked Dong Jun directly: “Where is the plane now? Take us to see it first!”
So under the leadership of Dong Jun, everyone soon saw the protagonist of this test flight.
”Well… isn’t this the Y-20?”
When seeing the Y-20S parked quietly in the hangar, many people were actually a little disappointed.
Because the overall shape of the Y-20S is actually similar to the previous Y-20, its most obvious difference is that it has two engines instead of four, and the size of the landing gear has become larger.
Apart from that, there is nothing special about it.
Of course, people like Kang Chi who know the specific details of the changes will definitely not think so.
The Y-20S actually has another major change that cannot be seen from the appearance, that is, the carbon fiber material of the entire fuselage has been replaced with T1200, which greatly enhances the overall fuselage strength. Otherwise, the previous fuselage material cannot withstand such a high thrust engine.
After the weight reduction and enhancement of the materials and engines of the current Y-20S, the empty weight has been directly reduced from 154 tons to 114 tons, and the thrust-to-weight ratio has increased from 0.415 to 0.877!
So don’t think that its shape seems to be similar, but the actual performance will definitely be very different! Faced with the disappointment of some leaders, Dong Jun and Kang Chi just looked at each other and did not make any excuses.
Anyway, technology is something that they may not understand no matter how much they say.
When the plane flies, they can directly feel how big the difference is.
No one talked that night. Early the next morning, Kang Chi and Cai Yaobin came to the test flight site after breakfast. Dong Jun and others had already started to make preparations.
Although Kang Chi provided the engine and improvement plan, he basically did not participate in the subsequent manufacturing and research and development process. Therefore, the test work was mainly directed by Dong Jun. He came here purely to witness the first flight.
He was also looking forward to how amazing the performance of the Y-20 with a new heart would be.
After all the leaders arrived, the plane had already taxied.Arriving at the end of the runway, they began to gather momentum.
The test pilots were Wu Shifeng and Sheng Hui from yesterday.
On the tower, Chief Shen briefly observed the aircraft on the runway through the telescope, then nodded to Dong Jun: “You guys start.” ”Yes.”
”This is the tower, calling Kunpeng.”
”Kunpeng received, please give instructions.”
”All preparations for the first flight test have been completed, you can start taking off.” Dong Jun said, and added, ”Fly in the same way as the third taxi test yesterday!”
Wu Shifeng knew what Dong Jun meant as soon as he heard it,
and this was exactly what he wanted.
With such a strong heart, it would be boring if the first flight was just a conservative long-distance taxi.
Wu Shifeng pushed the throttle valve to the middle and a little above. At this position, the afterburner will automatically open, so the two turbofans 30 began to roar loudly, and the huge tail nozzle gradually showed red high-temperature tail flames.
After confirming that the speed was normal, Wu Shifeng finally released the brakes, and the fuselage, which had been accumulating momentum for a long time, began to accelerate and slide like a wild horse.
At the same time, Wu Shifeng held the throttle valve and pushed it forward slowly, and finally pulled the power to the full!
Boom——
Accompanied by the roar of the engine, this transport plane weighing hundreds of tons seemed to have just started for a few seconds, and it didn’t even slide one-tenth of the runway. The nose began to lift off the ground and then quickly soared into the sky! Seeing such a shocking picture, everyone felt a little scalp numb, and was so surprised that they couldn’t even speak for a while.
“How many meters is the take-off distance?”
“Five hundred meters?”
“Absolutely not, this distance feels like four hundred meters at most!”
“That’s more than three hundred meters?”
“How is this possible? Fighter jets have to take off more than three hundred meters, and this is a large transport aircraft!”
“It seems that the C17 can take off and land at a minimum distance of more than three hundred meters.”
“…”
The picture that was completely beyond the scope of normal cognition made them subconsciously think that this was simply a dream…
But the roar of the engine that still lingered in their ears reminded them all the time that this was a real fact! “Maybe it was empty, and the wing is bigger?”
”No, the size of the wing is exactly the same as before.” Dong Jun finally couldn’t help but speak,
”Also, let me report to all leaders, the shortest take-off distance of the Y-20S just now, the exact number is 263.1 meters!”
After hearing this exact number, these military leaders immediately became uneasy.
”Fuck! You made a Kunpeng that is stronger than the C17?”
”263 meters? Did you calculate it correctly?”
”This distance… If the aircraft carrier deck is bigger, it can take off on the aircraft carrier!”
(End of this chapter)