Since I discovered the "true face" of the instructor just now, I don't feel nervous anymore because of the similar smell.

The plane soon reached the vicinity of 17a, and through the cockpit glass, a large clearing was cleared in the forest ahead, and a runway lay across the clearing, and several buildings were scattered around the runway, which were supposed to be temporary shelters for pilots' lounges and airport maintenance personnel.

Xu Wei and the others did not land immediately but made two large turns at an angle of 180 degrees near the airport, which was to confirm that there were no other aircraft in the surrounding airspace, which the Americans called "clear-turn", which must be done before doing the flight maneuver. The low-altitude airspace in the United States is open, and many small private planes travel at low altitudes, so this kind of safety measure is even more necessary.

Before landing, it is necessary to complete today's set task - stall training. This time it was not the instructor who did it, but Xu Wei as the main one, and the instructor would only take action to control the situation when he entered a dangerous state.

The aviation school once distributed a booklet during the ground class, which included the explanation of a series of flight maneuvers such as normal takeoff, crosswind takeoff, short takeoff, soft runway takeoff, deep turn, stall, low-speed flight, and emergency descent. Xu Wei only took a cursory look at it a few times, because this knowledge would not appear in the theory test, and his main focus was still on the question bank. With a vague memory, Xu Wei began to make his own power-on_stall.

He still remembers very well how to get into the Power-on_stall: adjust the throttle to reduce the airspeed of the aircraft to 65 knots, and then full throttle (DA20 does Power-on_stall not full throttle, but to 2300rpm) and at the same time pull back the steering wheel to let the airspeed slowly drop until it stalls.

While stalling himself, Xu Wei discovered a very serious problem - he could not maintain a stable course, which meant that the direction of his nose was constantly changing during the head-up process. The instructor kept repeating: "keep_heading! Xu Wei was anxious, as the nose of the plane was raised, the airspeed decreased, and the stability of the plane became worse and worse, his biggest feeling was that the steering wheel or rudder plane was going to be planted to the side, so he corrected the course extremely carefully, this very small correction could not meet the requirements of maintaining the course at all, just a few seconds, the plane course was close to ten degrees, if this was a license exam, Xu Wei could go home.

After a while, Xu Wei was able to maintain a good course a little, but when he looked at the heading instrument, it was a full 16 degrees, which was completely off, and Xu Wei also tried to adjust the course. At this time, the stall alarm suddenly sounded, and the stall occurred suddenly without Xu Wei being prepared. The nose of the plane fell first, which was the same as the situation that the instructor demonstrated to Xu Wei during the first flight, although it was the second experience, I still felt thrilling.

At this time, the instructor shouted, "Recover." Xu Wei was about to take advantage of the situation to press down the steering wheel, so that the angle of attack of the plane was reduced to below the critical angle of attack, and the sudden change occurred, and the nose of the plane, which was originally planted straight down, rolled down to the right side at the same time without warning. Xu Wei was so frightened that his brain was stunned, this situation was something he didn't expect, and there would be a rollover when he stalled? There is no one in the manual, what should I do now, Xu Wei suddenly has no master, in the end, he is a rookie, and it is easy to be in a hurry when he encounters an unplanned situation.

“hugo！ push_nose_down，keep_wings_level！ Seeing that Xu Wei had done nothing, the instructor was probably anxious, so he hurriedly reminded Xu Wei and asked him to press the nose of the plane and straighten the wing at the same time. The instructor's words woke Xu Wei up at once, followed the instructor's instructions to press down on the nose of the plane, and at the same time pulled the steering wheel left to restore the level of the aircraft, and in an instant, the stall alarm disappeared. Because the throttle is in a state of full output, at the moment of change, the aircraft automatically raises its head, and the airspeed begins to decrease again.

“nose_level！ build_up_speed。 Xu Wei was still glad that the stall alarm had disappeared, and the next moment the instructor's voice sounded in his ears again. Xu Wei subconsciously glanced at the airspeedometer, 46 knots! Xu Wei's cold hair stood up, when did the plane become so slow again, and if it was slower, it would stall again! Hurry up and continue to press the head, it still takes a lot of strength to hold down the head of the machine without letting it look up when the throttle is full, Xu Wei desperately pressed the steering wheel, in the process, the airspeed began to increase, 60 knots! 70 knots! 80 knots!

“reduce_power_slowly！ keep_altitude！ The instructor instructed from the side. Xu Wei followed his words, slowly closing the throttle, and at the same time reducing the force of pressing down on the head accordingly. In the end, the throttle was adjusted to 2100rpm, the airspeed was stabilized at 85 knots, and there was no need for Xu Wei to press the head, which was completely changed from the stall.

Xu Wei let out a long sigh, he was scared to pee out just now, and the plane rolled over in the air at 4,000 feet! This experience is more exciting than the first time he stalled, even after the change, Xu Wei's heart was still pounding, to exaggerate it, he thought something was wrong just now, and for a moment he even thought he was going to hang. When it was completely changed, Xu Wei couldn't help but have a little doubt in his heart, why did the stall done by the instructor have different results from the stall he did himself? What went wrong?