Every time you turn on the afterburner, it will consume the precious afterburner life of the fighter, however, Qin Feng doesn't care, and Western pilots don't care, every time they take off, they take off with afterburner.

Flying into the sky again, compared to yesterday, Qin Feng was already familiar with everything about this fighter, his hand pulled the operating stick, and the fighter went up, climbing to five hundred meters of leveling.

Colonel Mido had said that the aircraft's flight control system would allow the pilot to maneuver the aircraft without worry. So now, Qin Feng is going to give it a try.

Although from the bottom of his heart, Qin Feng has affirmed the other party's statement, but if he doesn't give it a try, he still can't be sure, after all, this is related to the introduction of equipment from the Air Force, and it must not be sloppy, just like Tu Lao's negotiations, talking about it one by one, and the current test flight is also to try it little by little.

This time, the flight time is longer than the last time.

If you want to enter the tailspin, you must first stall, and the stall is divided into many types, the simplest is the level flight stall.

The flight of the aircraft needs to have lift, and the wing produces lift because the wing is caused by the compressed air flow in the process of flying forward, so that if the wing speed is not enough, it cannot produce enough lift, and it will stall at this time.

After leveling the plane, Qin Feng began to slowly close the throttle to slow down, and at the same time pull the operating lever to prevent the fighter from falling in altitude and continue to maintain level flight.

As the roar of the tail subsided, the fighter began to slow down.

No need to look down, everything can be seen on the heads-up, which is why the 132 factory has been unwilling to give up the Marconi project, when there is a head-up display, it can greatly reduce the burden on the pilot, the eyes do not need to look down, just look at the front flat.

The speed of the fighter is constantly decreasing, decreasing, and because it is a digital display, it can be seen more clearly than the pointer type, Qin Feng can see the display on the instrument, which has reached 195 kilometers per hour!

At this moment, the operating lever had been pulled to the end, although Qin Feng still tried his best to maintain level flight to see what the minimum speed was, but now, the plane could no longer be maintained.

Qin Feng didn't have any operation, the fighter had already bowed its head, and under the operation of the flight control system, the fighter entered a dive state.

Colonel Mido in the rear cabin was waiting there quietly, he knew what Qin Feng was going to do, but he didn't have to be afraid, he was very confident in this plane.

What to do when a plane is about to stall and crash? That is, bow your head, dive, as long as you dive, it will convert the gravitational potential energy into kinetic energy, and after the speed of the aircraft increases, the lift of the wings will naturally come up.

Qin Feng wanted to make the fighter enter a stall state, but just when it was about to enter a stall, the people dived and changed it by themselves, it was simply a smart fighter that could fly without worry!

The fighter swooped down, Qin Feng turned on the afterburner, and then, pulling the operating lever back, the fighter broke away from the dive and began to climb up in the huge overload.

The first is a level flight stall, the second is a climb stall, as long as the thrust of the engine is less than the gravity of the fighter, then, the process of climbing will slow down, when the speed is getting smaller and smaller, it will enter the stall, this is more terrible than level flight, a lot of stall tailspin is in this case.

Now, the Mirage 2000 fighter is jumping upward, the speed is getting smaller and smaller, and after disconnecting the angle of attack limiter, the angle of attack has reached a terrible 39 degrees, and at the same time, on the header display in front of Qin Feng, the speed of the watch is falling rapidly, until it falls to 83 kilometers per hour!

At home, in this case, the plane would have turned down a long time ago.

But now, the Mirage 2000 did not, it seems that it has reached its limit, it has again begun to descend automatically, and the nose of the aircraft has begun to descend and enter a state of dive.

Although he was in the front cabin, he couldn't see the state of the rear cabin, and Qin Feng also knew that Colonel Mi Duo in the rear cabin did not carry out any intervention operations, and everything was the fighter's own flight control.

"In addition to not being able to enter the stall, it will not go into sideslipping." After leveling after the dive, the voice of Colonel Mido was heard.

Sideslip, theoretically, refers to a flight in which the plane of symmetry of the aircraft is inconsistent with the direction of the relative airflow. In other words, the longitudinal axis of the aircraft is inconsistent with the direction of the air flow, almost similar to the side-slip of a car, and the wheels are idling, not moving forward, but to the side.

There is also a metaphor for running like a drunken man, facing forward but running diagonally forward.

In the past, fighters were able to enter sideslip, and even in many cases, pilots would use sideslip to correct the course and so on.

Now, when Qin Feng heard that this fighter could not enter the side slide, he was very curious, and immediately skillfully and quickly pedaled the rudder, and pedaled several times in succession.

From a handling point of view, it is very simple to enter the side slip, and only pedaling the rudder or too much rudder will cause this result.

The tail of the fighter has a rudder, however, in flight, if you want to turn, the professional action is called a lever rudder, in addition to the rudder surface change in the tail, the fuselage will also tilt, using the combined force of lift and gravity to generate centripetal force.

If you only pedal the rudder, for example, only the left rudder, the nose of the aircraft deviates to the left, but the initial trajectory of the aircraft remains in the original direction, which causes the symmetry plane to deviate from the flight trajectory, that is, the right side slide.

After the side slip occurs, the vertical tail side force generates a stable moment in the direction of the right deviation of the nose. At the same time, the lift force of the right wing before the sideslip is greater than the lift force of the left wing after the sideslip, forming a lateral stabilizing moment that makes the aircraft roll left, so that the aircraft enters the left descent turn with the right side slip.

Even in air combat maneuvers, it was possible to dodge shells fired from the rear in such a way.

But now, Qin Feng repeatedly and quickly stepped on the rudder surface a few times, trying to appear the sideslip he was expecting, but Qin Feng was disappointed, because the plane did not react at all!

For wrong instructions, the fly-by-wire control system will not execute them, it has its own basic logic!

The basic logic is that there will be no stalls, no side slips, no matter how you control, these situations will not occur, and it can make the pilot really worry-free!

Fly-by-wire control frees pilots from complex flights and focuses on combat, so the third-generation aircraft must be controlled by fly-by-wire!

Qin Feng inexplicably came to the J-13 again, because the designers were conservative and always unwilling to equip it with fly-by-wire control, so that the performance of this fighter could not be effectively improved.

This time, Mr. Gu also came, after seeing so much, after going back, will the J-13 improve? No matter which project wins, in the end, it is for the Air Force to have fighters close to this era!