The throttle lever on the left was pushed to the front. After the speed came up, Li Zhan released the brakes and the fighter plane began to accelerate and taxi forward. He stared at the speedometer, and after reaching the take-off speed, he quickly pulled back the throttle lever and raised the speed brake flaps.
Use the tire brake to start decelerating when going uphill.
The fighter plane taxied forward for almost a kilometer before slowly stopping. Li Zhan slid to the taxiway next to him and reported to the tower, "Tower, all my systems are normal. Requesting a test flight, completed."
"Dongyao can be tested for flight. Check it again for safety. It's over." Xue Xiangdong agreed to Li Zhan's request.
"Dongyao understands."
Li Zhan returned to the take-off position and once again checked the various systems of the fighter, especially the flight control system and the power system. The former was most affected, and the most critical was the latter, which was the most important among all systems of the fighter.
After confirming that everything was normal, Li Zhan began to take off.
Maximum throttle, flaps in takeoff position, release brakes, pull up and climb.
The moment after taking off the ground, many people were relieved. Especially the officers and soldiers in the repair shop and maintenance brigade. The aircraft was repaired, but everyone was unsure whether it could fly normally. As long as the aircraft flew,
This is more than half of the success. The importance of the first flight lies in this.
"It feels very jerky and unnatural, like a car with improper wheel alignment." After climbing to 3,000 meters, Li Zhan considered his words and said.
Every ground-air dialogue will be recorded, so every feeling and opinion raised by Li Zhan during the flight will be recorded for later analysis.
"Dongyao, how is the attitude of the fighter plane? Is the flight control normal?" Xue Xiangdong asked.
Li Zhan replied, "The posture is quite stable and the flight control is fine. It's over."
"Dongyao, standard test flight procedure, feel free to express your feelings, over." Xue Xiangdong ordered.
"Dongyao understands."
Li Zhan continued to climb to an altitude of 8,000 meters, and could not go any higher. Because it was a test flight, the safe altitude was very important. After 4,000 meters, the oxygen would be very thin, and the pilot needed an oxygen supply system to maintain breathing. So Li Zhan was at 8,000 meters.
After flying level for a while, it quickly dropped to an altitude below 4,000 meters and circled around the station.
More than 20 minutes later, Li Zhan asked the tower for instructions, "Tower, I'm going to make some maneuvers to comprehensively test the aircraft's control system. It's over."
After nearly half an hour of flight, there were no problems, indicating that the repair of the fighter aircraft was successful and basically reached the standards for delivery and use.
Xue Xiangdong had no reason not to agree. He said, "Dongyao, you can do some maneuvers, but don't do large overload maneuvers. That's it."
"clear."
Li Zhan began to perform simple maneuvers, from an altitude of 4,000 meters to less than 1,000 meters. When a fighter aircraft maneuvers, except for diving, it is basically a process of losing energy, so altitude is needed to maintain it.
After reaching the height again, Li Zhan selected a few actions that could comprehensively test the control system. When he reached the barrel roll, an accident happened.
"Tower, I'm flying in reverse and can't change it back. I'm checking the flight control system. It's over." Li Zhan reported the situation calmly and calmly as usual.
Everyone in the tower was shocked. Wasn't it good luck? Why was there still a problem?
"Dongyao, repeat that!" Xue Xiangdong asked.
Li Zhan said, "The flight control failed. I'm flying upside down right now. I can't correct it. It's over."
Su-27sk No. 01 was flying with its feet in the air and its head down. Li Zhan suddenly got stuck in this posture while doing a barrel roll, and immediately judged that there was a problem with the flight control system. He tried to maintain the height while
Thinking hard about solutions.
Xue Xiangdong had no choice at all. Apart from Nie Jianfeng and Tang Leilei, the two instructors with the most experience in using Su-27 fighters in the 101st Regiment, only Li Zhan was left. In terms of familiarity with this fighter, Xue Xiangdong, who had just completed the modification training, was
In any case, it is not as good as the above ones.
Soon, Li Zhan decisively made an accurate judgment and said, "Tower! I judge that there is a problem with the autopilot. Prepare to disconnect the autopilot, over!"
How to disconnect?
There is no disconnect switch.
Li Zhan's method was simple and crude. He found the hard connection and directly pulled out the line...
Maintenance: Is this okay?
It was successfully changed to manual control. The flight control system did not completely fail. The problem was only with the autopilot system. The reason why pilots think that third-generation aircraft are easier to drive than second-generation aircraft is because many functions have been automated and intelligent. For example, trimming, driving, etc.
When flying the J-7, it needs to be done manually. When flying a third-generation aircraft, sometimes it is as simple as pressing a button and the fighter will complete the trimming with the help of the autopilot.
Generally speaking, the chance of problems with the autopilot is very low, but for the No. 01 fighter jet that has been rewired and undergone major repairs, such problems are nothing to be surprised about.
Modern aircraft are precision machinery, and the entire system is very complex, but sometimes it is quite simple, so simple that simple methods can be used to troubleshoot faults. When designing each weapon, we will try to fully consider it based on the actual use of the troops.su
The early prototypes of the -27 were mechanically driven, but a telex was installed longitudinally due to a serious accident involving loss of attitude.
Li Zhan used strong methods to remove the autopilot control of the fighter plane and changed it to full manual control. After that, he slowly regained control of the fighter plane, leveled the fighter plane, and eliminated the danger.
"Tower, please continue the test flight and more fully check the repair situation. Complete." Li Zhan called the tower.
Xue Xiangdong asked, "Dongyao, how is the attitude of the aircraft? Is the flight control system normal? It's over."
"It's relatively stable. There's no problem with the flight control, but I've disconnected the autopilot and now it's full manual control. It's over." Li Zhan said confidently.
"Dongyao, you can continue the test flight, it's over." Xue Xiangdong pondered slightly and agreed to Li Zhan's request.
It is best to be able to find out all the hidden dangers in one test flight, and it is only the autopilot that fails, which is not a big problem. There are so many early second-generation aircraft that have autopilots, and they can still drive smoothly.
And it drives very smoothly.
If the entire flight control system fails, Xue Xiangdong will not hesitate to order Li Zhan to return to the field and land. If he loses control of the fighter plane, he will resolutely order Li Zhan to parachute and abandon the plane. One aircraft can be used for another year or two at most.
It is just an old aircraft that has been in service for more than ten years. If it is gone, it will be gone. But pilots are rare, especially a combat pilot like Li Zhan, a super-top ace who can fight hard and is so handsome that people and gods are angry.
Li Zhanyi was a brave man. He drove his hairless old aircraft No. 01 and spun, jumped, rolled, dived, climbed and looked at the sky. Except for the large overload maneuver, he did everything else at least twice, and he even managed to fly the J-7B.
The feeling of shape. The double chrysanthemums of the No. 01 old machine sometimes bloom and sometimes lock together with the change of thrust force, like a girl sitting on a big pendulum, closing in waves.
It took Li Zhan a full two hours to land, and the test flight was declared over. The repair shop and maintenance staff still had to find out the cause of the autopilot failure and conduct a comprehensive overhaul of the fighter jet.
When Li Zhan landed, a top-secret telegram was sent to Beikuchang Station from Guo Beimu, chief of staff of Dudachang Station, instructing Li Zhan to burn it after reading it.