Chapter Eighty-Three: Low-speed Interruption (Added in Advance Again)

Xu Qing suddenly regretted a little, he just mentioned it casually, but he didn't think that Qu Xing didn't understand what he meant at all, and he was heard by Instructor Wang.

If you want him to time, let him time it, and it doesn't matter, pretending to know NM best, is Xu Qing the smartest?

Qu Xing looked like he didn't know what was going on, Xu Qing really had no choice but to answer by himself: "No timer, no cold turn!" ”

Instructor Wang obviously asked Qu Xing, but Xu Qing picked him up, and other teachers had already started to scold Xu Qing. Instructor Wang lay back helplessly and said, "Go on!" ”

Xu Qing was ready to be scolded early in the morning, he thought about it anyway, if he didn't check it himself, it didn't matter if he was scolded, he couldn't let Qu Xing enter the pit.

Qu Xing then realized what his problem was, and threw Xu Qing a grateful look. Xu Qing Khan, why are you grateful to me, I didn't invite this disaster?

Because the starting handle is not lifted, it is enough to directly dial the starting valve to the closing position.

"Alright, let's bring it up!" Teacher Wang said that this subject is in the past.

"Pull it directly to the runway, do the pre-takeoff checklist!" Instructor Wang directly asked Qu Xing to take off in a configuration.

Qu Xing made meticulous movements, and Xu Qing watched from the side, without any mistakes or omissions. I went through the pre-taxi checklist and the pre-take-off checklist again before I reported it ready.

"Get ready and go, watch out for the slippery runway!"

"Slippery runway?" Xu Qing instantly became alert, the slippery runway is easily associated with a fault - interrupting takeoff! Originally, he thought that the two co-pilots were flying, and Instructor Wang would not interrupt the take-off. After all, interrupting the takeoff is the captain's business, except for some special circumstances, where is the turn of the co-pilot to interrupt the takeoff. Therefore, the two co-pilot flight simulators rarely have subjects that interrupt takeoff, and the training may be slightly more.

However, hearing that Instructor Wang took the initiative to propose a wet runway, Xu Qing had an intuition that he was going to take off at a low speed!

"Pay attention to the manipulation in a moment!" Xu Qing was worried that Qu Xing's reaction would be slow and he missed the opportunity to interrupt the low speed, so he specially reminded Qu Xing.

Qu Xing also felt that Instructor Wang might have to interrupt the takeoff, but he didn't think about it as deeply as Xu Qing, and he was still recalling the conditions for interrupting the takeoff, the action of interrupting the takeoff, and the process of cooperation.

Xu Qing asked him to pay attention to the manipulation, which should prevent two people from manipulating at the same time, and it was not easy to keep the direction.

From this item alone, it can be seen that Er Rao's sensitivity is not at the same level at all.

As before, the throttle is controlled by Xu Qing in the left seat, and Qu Xing in the right seat controls the steering wheel and rudder.

With a standard shout, after confirming that the N1 was stable, Xu Qing pressed the TOGA electric pedal, and the throttle began to automatically increase to the take-off thrust.

At this time, Xu Qing's nerves are highly tense, if it is a low-speed interruption, the fault should appear in these few seconds, no matter how long the time is, after the speed comes up, the rudder surface effect will become more and more obvious, at that time, the difficulty of the interruption will change from the control direction to how to stop before the runway head, in Xu Qing's view, this difficulty is reduced, after all, the runway of K City Airport is more than 4000 meters, even if the reaction is slow, it can still be easily stopped.

Qu Xing's focus is on the point of 80 knots!

Below 80 knots, theoretically any unsafe situation can be interrupted, such as side window opening, flat tire, bird strike, etc. From 80 knots to V1, because of the high-speed interruption involved, the risk factor rises rapidly, especially on the short runway of more than 2,000 meters, and it is likely to rush out of the runway if the response is not timely. 80 to V1 generally only have fire alarms, wind shear and engine failures need to be interrupted.

As a result, some instructors will have some non-important faults after 80 knots to see if the crew can calmly decide whether to interrupt the takeoff.

It turned out that Xu Qing was still a good player!

When the plane was just starting to move and the speedometer was gradually rising, there was a sudden muffled sound, and the plane began to deviate to the right in an instant.

Sure enough, it was a low-speed interruption!

As soon as Xu Qing heard this sound, he knew that an engine had failed, and looking at the deflection direction, it should be a second failure.

I can't wait for Qu Xing to shout and maneuver, every second counts against the low-speed interruption, and if it is a second late, the plane will probably not be saved.

"Smack!"

Xu Qing slapped the accelerator to the slow parking space as fast as lightning, making a dull sound. The airbrake is raised, and the backspray is pulled up. In fact, the airbrake and backspray can be left alone. At low speeds, the deceleration effect of the airbrake and backspray is minimal, and if the situation is urgent, they are simply ignored.

The key to a low-speed outage is direction, direction, and direction!

Because of the low speed, the rudder surface effect of the rudder is not as good as that of the high-speed state, and the effect of controlling the direction is quite poor. At this time, the handwheel needs to be used, and at low speeds, the effect of the handwheel is much better than that of the rudder.

Another question is deceleration, why did Instructor Wang specifically mention the wet slide surface, because without the prerequisite for the wet slide surface, low-speed interruption will become less difficult to do.

Under normal pavement and with sufficient braking effect, the pilot can stop the aircraft in an unfavorable situation where the aircraft cannot maintain direction. Although the nose of the aircraft is off, the aircraft can still be on the runway.

It's not the same with a slippery runway, once the direction is not well controlled. Even if the brakes are pressed, it is possible to rush off the runway, so the low-speed interruption of this slippery track is to control the direction.

The first action of interrupting take-off, the throttle, is interrupted quickly at low speeds on the slippery runway.

Retracting the throttle can balance the thrust difference between the two sides and prevent the nose from continuing to deflection, while thrust retraction can stop the tendency of the aircraft to accelerate, so that the aircraft can stop faster. Both of these points are crucial to the aircraft's ability to stop on the runway.

Xu Qing finished the interrupted action like a wind, and at the same time the brakes were pressed, and the handwheel also followed, and began to slow down the plane and control the direction of the plane.

I have to, Xu Qing's movements are really fast. The plane just deflected to the right for a moment, and the trend was stopped, and at this time, Qu Xing, who reacted, shouted: "Handle the maneuver!" ”

"Take the manipulation!" Xu Qing responded, quickly glanced at the engine instructions, and sure enough, the second shot failed!

"You're fast enough!" Instructor Wang teased: "It's strong enough, don't break the throttle lever!" It's been restored! ”

Xu Qing laughed embarrassedly, what was the situation just now, where do you care so much, but it should be just a joke to see Instructor Wang, nothing serious!

"The right seat is a little slow to react, the left seat is done, and you can hand over the manipulation!" Teacher Wang was dissatisfied.