344: C344 The Test Went Smoothly

C344 The Test Went Smoothly

The last step before the test flight is to actually test the acceleration of the plane. The plane started the engine at the starting point of the runway, and when the plane started, it kept pushing the accelerator, allowing the plane to accelerate and sprint. When they reached the takeoff speed of the model, the crew only needed to lower the wings and increase the angle of the plane to take off.1

However, the acceleration test this time was not a test flight test. Therefore, after the crew accelerated to the takeoff speed, they could not put down the flaps. Instead, they had to immediately stop the oil so that the plane would slow down at the critical moment of takeoff.

Through this test, they could test the approximate distance of the plane taking off, but it was only a rough estimate. If the wind direction and wind speed were different, the distance of the plane taking off would also be different.

However, at the test airport of Shangfei, when the two aircraft were undergoing acceleration tests, the estimated takeoff distance was slightly shortened by 200 meters compared to ordinary planes of the same model. Although this was an upgrade, for civil airplanes... It didn't mean much because most airport runway was enough for a plane to take off.

It was not troublesome to conduct the aircraft engine test alone. The reaction speed of the DC11 on these two airplanes... It was even stronger than the original engines, and the thrust was sufficient. Therefore, after these few days of crane testing, the crew and the test crew all thought that the two planes had the test flight requirements. After all, the engine was only a source of power, and the main body of the plane was in its golden age. So, as long as the reliability and sensitivity of the engine were guaranteed... Then these two planes would be equipped with the test flight conditions.

The commander-in-chief led the test subjects to formulate five test flight procedures, the first test flight plan. It was a simple landing and landing test flight. After the plane took off at the airport, the plane flew along the runway for ten kilometers before starting to turn. Using the commonly used five-way approach method in the Civil Aviation field, it turned back and landed at the airport.

The second flight plan, after taking off, the plane would climb to a height of 3,000 kilometers. After reaching a certain height, it would maintain a set altitude of 50 kilometers, then turn back and perform a five-way close landing above the airport.

The third test flight plan, the plane would need to climb to a height of seven thousand meters.

The fourth test flight plan, the plane would need to reach a height of ten thousand meters to eleven thousand meters.

The fifth test flight plan not only required the plane to reach a cruise height, but also a high altitude. The route of the flight test had to be very strict. Make sure that the entire route was no more than 300 kilometers apart. There was a landing airport to prepare for any abnormalities in the plane. You can land near the landing pad, if there are no problems during the entire journey... The plane would be able to complete the entire flight route and return to the trial jet airport.

All the test flight procedures had been reported to the Air Administration Department. Due to the special care of the higher ups, the priority given to Dong Chen by the Air Administration Department had even exceeded the treatment given to all Civil aviation aircraft. All the procedures were quickly approved, and all the landing and landing airports were notified. They could respond to Dong Chen's landing requirement at any time.

The first test flight, the two airplanes took off ten minutes apart. The first one to take off was the Boeing 737. Zhang Yunfeng had also personally boarded the plane. Together with a few test engineers, they squeezed into the narrow cockpit. The captain received instructions from the tower and performed a routine check with the deputy captain. The engine of the plane started up and slowly pushed out of the parking space.

Inside the cabin, the roar of the engine was not very loud. The captain also said excitedly, "With this low-speed propulsion noise, it is much stronger than all the large and medium-sized passenger planes. The deceleration of this engine is indeed superb. I believe that the noise inside the cabin will also be much smaller."

The test subject nodded and said, "The decibel level is at a low speed. Compared to the same engine, it is about 15 decibel. If it is in a high speed state, the drop in noise can reach almost 30 decibels. "

The captain smiled and said: "Today I am in the first flying position, and also made me the first captain to fly the DC11 to the sky. In the future, the DC11 will definitely become a classic in the Civil Aviation field. To me, it is indeed a great honor! "

As he spoke, the plane had already entered the communication channel. The communication channel was connected to the runway at a 90-degree angle. The captain gradually increased the propulsion of the engine, causing the plane's gliding speed to slowly rise. Very quickly, the plane had entered the final 90-degree turn.

Ordinary old pilots rarely stopped after they retracted their oil before turning the corner. After aiming at the runway, the old pilot restarted the engine and took off. In order to operate efficiently, the old pilot... Basically, he would accelerate before he entered the runway and not collect oil when he turned around. Then, after he completed the turn, he immediately accelerated and took off. This way... When the plane entered the runway, it already had a certain speed, and it did not need to go through a long process of acceleration. It could shorten the takeoff time of the plane even faster.

The captain did the same. The plane accelerated and then agilely made a turn at the corner. After turning, it did not stop at all. It pushed the accelerator of the engine together with the deputy captain. Then, the plane began to accelerate continuously. After reaching the takeoff speed, the captain laughed and said to himself, "Alright, it's time. Let's go!"

Following that, the head of the plane began to rise, and the plane took off smoothly.

At the same time that the plane tilted to the ground, the captain said, "I have to say, the performance of the DC11 is indeed outstanding. It's not only its powerful fuel economy but also its low noise. Even its response speed and power feedback speed are much stronger than ordinary engines. It can be expected. This engine will definitely be the first to obtain China's flight permit. At that time, china's Civil Aviation Company should be the first customer to change into DC11. If the international industry knows about the performance of this engine, I'm afraid they will be so jealous that they won't be able to sleep. "

The deputy captain nodded and smiled. "That's right. The cost of fuel alone has been reduced by nearly 40%. This is enough to make all the airlines around the world jealous. "

With the acceleration of the aircraft's engine at its maximum, the noise within the aircraft became even more obvious. Zhang Yunfeng himself could feel that the engine announcement was much smaller than when he took the plane previously. He had also taken the economy class with the worst environment a few times in the first place. He had taken the economy class seat close to the wing many times, and he knew that the noise there was the biggest. It was so big that it was unbearable.

However, when Zhang Yunfeng walked into the cabin, the noise inside was much smaller than when he had sat in the cabin before. When he reached the seat next to the wing, he saw that the engine was running at full speed under the window. The noise was within acceptable range.

The plane quickly started to turn, and the five sides that were carrying out the routine closed in. The landing process was also very smooth, and the engine did not show any abnormalities during this short test flight.

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