The altitude is 3500 meters, the speed is 170 kilometers, the route is correct, and there are no errors.

His eyes froze, Zhou Hai's face was solemn and serious, and his voice was powerful and calm: "Remember, Master." ”

"What is the definition of stalling?" Li Fu nodded and said casually.

Zhou Hai had the theoretical definition of stall in his mind, and replied: "The lift coefficient of the aircraft increases with the increase of the angle of attack of the body, and when the angle of attack increases to a certain angle, the lift coefficient does not rise but falls, resulting in the lift of the aircraft being less than the gravity of the aircraft, and finally the wing loses the pressure difference and loses lift, resulting in a fall, which is called a stall." ”

Li Fu continued to ask, "What is the meaning of minimum speed?" ”

"The lower the minimum speed, the shorter the take-off runway and the shorter the corresponding airport runway, which greatly reduces the ground detention time and improves safety and maneuverability." Zhou Hai replied without hesitation.

"What's the point of good or bad performance at low altitude and low speed?"

"Whether the low-altitude and low-speed performance is excellent, as an important indicator to measure the performance of the fighter, generally speaking, the low-altitude and low-speed performance is excellent, which means that the flight state is stable, the ground attack is stable, the lift coefficient is high, the comprehensive maneuverability is excellent, the air flow resistance is high, and the low-altitude and ultra-low-altitude flight conditions are excellent."

Zhou Hai's face was calm, his words were strong and clear, and he replied slowly: "Poor low-altitude and low-speed performance means that it is easy to crash. ”

Crash.

Yes.

Poor performance at low altitude and low speed, there is only one consequence - easy crashes.

Of course, this description is more euphemistic, and it is described in professional aviation terms as 'flying coffin board'.

Coincidentally, the F-104 supersonic fighter equipped with the history of the US Air Force was awarded this title by the air forces of various countries.

Low-altitude and low-speed performance is an important indicator to measure the maneuverability and performance of fighters.

"Not bad."

Hearing what Zhou Hai answered, Li Fu praised it, did not continue to test the question, maintained a horizontal attitude, and flew along the predetermined route.

Maintain a cruising speed of 170 kilometers per hour, an altitude of 3500, due north, and the destination - 580 kilometers away at the Danzhen training base.

As for Zhou Haiji's previous ideas and maneuvers, none of them were realized.

Imaginary airplane flight?

Inexistent.

It's really just imagining.

However, this is always a good starting point, after all, he has been ahead of the aviation school flight cadets of the same age for three years, and he is not in a hurry.

The next flight journey was quiet and dull, and Li Fu kept flying smoothly and did not continue teaching.

And Zhou Hai gradually restrained his emotions, adjusted his mentality, recovered his indifference, and accepted the situation that he was about to get on the plane.

Excitement, joy, anticipation, these emotions have disappeared, only a calm heart.

The sky, slightly overcast.

The unique roar of the front-mounted piston-6-star nine-cylinder aero engine resounded in the sky.

……

In the blink of an eye, it was afternoon.

After about three and a half hours of flight, the Junior Sixth Student, carrying two people, crossed a distance of 580 kilometers and flew to the airspace outside the Danzhen training base, and at this time only 10% of the fuel on board was left.

On the ground, the snow-covered Danzhen training base comes into view, with the iconic straight runway and towering towers with radar antennas, as well as a patch of low-rise bungalow buildings.

In the apron area at the edge of the runway of the airport, the military green junior six are parked in an orderly manner and lined up.

"Buzz!"

In the dim sky, two Junior Sect Six formed a two-plane formation, passing at high speed hundreds of meters below Li Fu and Zhou Hai, flying freely, and a huge roar was heard.

On the west side of the base, six junior sect six formed a triangular formation, which was huge and particularly spectacular.

"Call the tower, trainer 12 requests to land."

Li Fu held the control stick, slowly lowered the flight altitude, and the nose of the aircraft faced the base runway, turned on the airborne military radio communicator with his hand, connected to the special encrypted communication channel, and called the ground tower.

"Buzz!" Suddenly, Zhou Hai, who was observing the ground base, stared at his eyes, and the sound of engines with different rhythms came from his ears.

"Master!"

Zhou Hai looked up at the sky, only to see a No. 11 Chujiao Six, like a fierce eagle, violent, swooping towards his side, the front-end hydraulic double-bladed propeller formed an afterimage, the whole person was startled, and quickly reminded Li Fu.

What is this for?

Got into an accident?

Just when the altitude difference between the two planes was only about 30 meters, this Chujiao-6 suddenly rolled right and flipped over, flipped three times in a row from the middle of the air, flew to the right side of its fuselage, and then leveled and stabilized, and flew with it.

Bold, precise.

After some operation, the distance between the two machines is only less than ten meters.

"Gollum ......" Zhou Hai swallowed his throat, stared at his eyes like copper bells, and through the cockpit protective glass, he clearly saw that the front seat of the No. 11 Chujiao VI on the right side of the fuselage was sitting a flight instructor about 40 years old.

In the back seat is a young pilot student, wearing a hat made of leather, with a calm and indifferent complexion.

Li Fu glanced to the right, stabilized the fuselage, didn't care, his face was indifferent, and he wrote lightly: "Oh, it's okay, that old guy's way of greeting." ”

"......" Zhou Hai was stunned when he saw this, and his heart was messy.

this

this

Is there still such a way of greeting?

Such a unique way of greeting made Zhou Hai completely stunned.

What kind of artist is this bold bull who dares to fly like this.

At the same time, in the dedicated encrypted communication channel, the voice of the base tower sounded: "No. 12 training aircraft, northwest wind, wind speed level 3, gust level 5, field pressure 1014, permission to land, runway No. 1 has been emptied." ”

"Received on the 12th, ready to land." Li Fu's voice was calm.

"Lao Li, I haven't seen you for a long time, and you came back with a rookie so soon?" At the same time, a slightly hoarse voice from Flight Instructor 11 was heard in the encrypted channel.

Li Fu's eyes locked on the No. 1 runway of the base, and his words were steady and powerful: "Fan dogan, your skills have declined a little, usually about eight meters, but now you have ten meters, right?" ”

"Old squad leader, I said, don't call me Fan Dog!" On the radio channel, the flight instructor roared loudly.

Li Fu said lightly: "Oh, Fan Goudan, you still owe me a meal, when will you pay it back?" ”

“……”

There was a murmur over the radio channel.

No. 11 Chujiao 6, which was flying on the right, raised the nose of the plane and rolled down to the right, flew out of a large-angle arc, and then left.

"Huh!" Li Fu sneered, and while lowering the altitude to meet the approaching runway, he said to Zhou Hai: "This old guy's name is Fan Erqing, a base flight instructor, and his flying skills are average. ”

“……”

Zhou Hai didn't say anything, he looked at the ground that was getting closer and closer, and wanted to remind him, can you land safely first.