Chapter 12: Wind Shear!

This crosswind came so strangely that the instructor at the beginning of the flight confirmed through the ATIS (Automatic Terminal Intelligence Service) that there were no strong gusts, let alone wind shear, however, this completely unreasonable crosswind blew the plane could not return to the runway at all. The instructor can't do anything if he tries to correct it, time is running out, and the instructor needs to make a quick decision.

“ok,we_around!” The instructor was unwilling to continue to risk the danger of correcting the landing, and decisively chose to go back to flight.

The instructor immediately filled the throttle to form a take-off thrust, and did not rush to retract the flaps, but climbed at a small rising angle, waited for the airspeed to increase to a certain extent, and retracted the first gear flaps first, and at the same time contacted the tower to inform him of his intention to return to flight, and the tower immediately replied and asked if it wanted to continue the landing.

The instructor was just about to answer, the plane looked up suddenly, Xu Wei could feel that the instructor did not move the steering wheel, and what was even more panicked was that as the nose of the plane was raised, the airspeed dropped sharply, and Xu Wei even heard the stall alarm! This is not a simulated training, it is a real stall warning!

"Is it the wind? Yes, definitely. Xu Wei let out a cold sweat, which was more thrilling than a simulated stall, followed by a violent turbulence, the plane was like a lonely boat swaying in a huge wave, and Xu Wei felt that his heart trembled with the plane.

The instructor also seemed unaware of this situation.

When the plane is a little stable, retract the remaining two flaps and ask the tower at the same time: "Athnes, i_want_to_confirm_weather_report, especially_windshear." ”

The instructor was very suspicious that he had encountered windshear, or windshear, which refers to a sudden change in wind speed or direction in a certain area, and is a weather phenomenon that all pilots hate. In particular, a low-altitude windshear is encountered during the landing phase, and a crash is not impossible in the event that there is simply not enough altitude for the pilot to change out of the stall.

The weather information provided by the tower is the same as what I heard from ATIS before takeoff, and finally it is specifically mentioned:

“no_weather_report_shows_windshear_happening_in_athens。”

The instructor couldn't say a word for a long time, and his expression was as if he had eaten a dead fly, and the low-altitude wind shear was indeed so disgusting.

The instructor thought about it for a while, but decided to continue the landing. In his words, it might be "bad_luck." ”

The plane climbed back to 1,800 feet and immediately made a ninety degree turn to the left, and the instructor prepared to do a five-sided approach.

The so-called five sides are "upwind", "crosswind", "downwind", "base", "final", and these five sides, together with the runway, form an approximate square.

As for why you climb to 1,800 feet and not the other altitudes, it's because the altitude of the five-sided approach is the altitude of the airport plus 1,000 feet, and the altitude of the athens_airport is 780 feet, which is almost 1,800 feet.

On the third side, that is, when the "downwind", at this time the direction of the aircraft is parallel to the runway, before about to cross the runway, the instructor adjusts the throttle to 1500rpm again, opens the vaporizer heating valve, lowers the 10-degree flaps, and then the plane slowly descends, and the airspeed is maintained at about 80 knots, which is quite stable, and it seems that the wind shear has subsided.

“it‘s_gone!”

From the second side to now, there has been no bumpy movement, the instructor can't help but be happy, and Xu Wei is also relieved.

If this scene takes place in the movie, the moviegoers will definitely say that the instructor is setting up a "flag", and there will definitely be wind shear. The fact is that the wind shear and Xu Wei played hide and seek, and when they were just relaxed, the plane rose sharply, as if it was held up by something, and then fell hard, and the plane fell rapidly, like a roller coaster.

The reason why "falling" instead of "descending" is because the plane dropped altitude too fast, Xu Wei's butt even left the seat in an instant, feeling a moment of weightlessness, and at the same time, the stall alarm came as scheduled, but it stopped after a while.

“holy_****!” The instructor also seemed to be annoyed by the wind shear. This was not the end of the story, as had been encountered before the grounding, a crosswind blew the plane all the way to the right, and the trajectory of the aircraft had begun to deviate from the normal track of the five-sided approach. The instructor almost pulled the steering wheel to the bottom before slowly correcting it, which completely angered the instructor. The "**" that had already reached his mouth had just spit out half before he realized that there was still a Xu Wei sitting next to him, so he stopped talking directly. The American instructors still paid a lot of attention to quality, at least they didn't say much swearing.

"unetable_flight_ahhh...," the instructor deliberately changed the subject.

In view of the strong wind speed and the fact that the wind direction is a bit unpredictable, the instructor decided to use only 10-degree flaps, which can be overturned directly under 20-degree or 30-degree flaps.

However, fortunately, the wind was a lot more comfortable, and it went all the way to the final, and there were no serious bumps in the runway. For safety reasons, the instructor still insisted on the 10-degree flaps, while the throttle output was adjusted slightly more than usual and the approach speed was a little faster than usual, all to prevent stalls.

There was hardly a hint of bump in the approach that followed, a far cry from what had just turned the world upside down. When flying over the runway head, the instructor began to slowly retract the throttle, the process is very gentle, and the airspeed gradually decreases evenly, in a moment before grounding, the instructor receives the head of the throttle, and at the same time pulls the steering wheel back, so that the nose is slightly raised, to ensure that the landing gear is the rear wheel to land first, but can not be pulled too hard for a while, otherwise the aircraft may stall, and eventually lead to a heavy landing.

As expected, the instructor's technique was quite skillful, and the last two wheels were the first to be grounded, and then the front wheels landed on the runway and landed perfectly.

When fully grounded, the foot brake slows down and contacts the tower at the same time. The tower instructed the aircraft to turn into taxiway B, and then listen to the ground control, and the instructor switched the frequency to 121 as instructed. 6。