Chapter 150: Are you having so much fun? Doing the Hartmann roll right from the start?
Those who often fly planes and like to act recklessly know this.

Aircraft maneuvers can be mainly divided into positive G maneuvers and negative G maneuvers.

What is G?

G is the acceleration due to gravity of the Earth.

The value is usually taken as 9.8m/s.

nG is n times the acceleration due to gravity of the earth.

G was originally just a symbol for the acceleration of gravity, but in the field of aviation, it is also expressed as the overload of aircraft, missiles or other aircraft.

This is because when aircraft, missiles and other aircraft are flying, the various parts of the fuselage and body of the aircraft will also bear corresponding loads.

So the greater the overload, the more severe the force on the aircraft or missile.

If it is a manned aircraft.

Then the pilot flying the aircraft will also bear the corresponding overload.

A normal person can usually withstand about 6G.

After exceeding 6G, the body will feel severe discomfort.

This is accompanied by severe nausea, tinnitus, dizziness, etc.

Therefore, many people feel strong discomfort when taking a plane during takeoff and landing.

This is how the body reacts when it is overloaded.

If a pilot is in good physical condition or has received professional anti-G training, he can usually withstand a short-term overload of 20 to 30 Gs for more than 7 to 8 seconds.

If a pilot flying a high-speed fighter jet uses a gravity suit and a high-pressure mask, he can even withstand an overload of 9G for a short period of time.

However, it is difficult for the human body to withstand a high overload of 9G.

Because of this time.

The human heart can no longer complete blood circulation, so the pilot will experience physical reactions such as dizziness and black vision.

If the pressure exceeds 9G for a long time, it may even cause the body's important organs to fail due to ischemia and even death.

In the field of aerospace, G-force is a very important indicator.

It especially affects the physical health and mission completion of pilots or astronauts.

G-force can be divided into positive G and negative G.

This means that when the aircraft changes its speed or attitude, positive or negative gravitational acceleration will be generated.

usually.

Positive G occurs when the vehicle is accelerating or climbing upward.

Negative G occurs when the aircraft is slowing down or descending.

Let me give you an example that is not quite appropriate.

If G-force were like riding in an elevator.

The increase in the upward gravity G of the elevator is positive G.

The downward force of gravity G of the elevator decreases, which is negative G.

And during the flight.

A maneuver with the aircraft's nose pointing upward is a positive G maneuver.

A nose-down maneuver is a negative G maneuver.

Whether it is positive G or negative G, if the value is too large, it will have a great impact on the pilot.

If it is positive G, the pilot will generally experience blackout (dizziness, black vision).

If it is negative G, the pilot will go red (brain congestion).

To put it simply, it is the difference between brain congestion and brain ischemia.

But humans can tolerate positive G far more than negative G.

This is because during a positive G maneuver, blood in the human body flows to the legs, causing ischemia in the brain, and then physiological reactions such as black vision occur.

However, during negative G maneuvers, blood will flow to the brain, causing red vision.

Cerebral congestion is far more dangerous than ischemia.

Therefore, the aircraft's maneuvers are generally based on positive G maneuvers.

Currently.

There is only one negative-G maneuver that is maturely used in the world - the Hartmann roll.

The Hartmann roll is so famous.

The reason is quite simple.

First, this maneuver is a rare negative-G maneuver.

Secondly, the Hartmann roll was the signature aerial defense maneuver of Hartmann, the famous ace pilot of the German Luftwaffe during World War II.

Erich Hartmann flew a total of 1404 combat missions, fought more than 825 air battles, and destroyed more than 352 enemy aircraft.

He is also the first pilot in human air combat history to have achieved more than 300 victories.

Now Jiang Chen was driving the CJ-6 into a dive, and while doing so, he was also performing an irregular barrel roll.

Anyone with a little bit of insight would know what this kid is up to.

Yes!

He gave Liu Xiyuan a small shock.

It's the famous Hartmann roll.

Airplane cockpit.

front row.

Liu Xiyuan had already tightly grasped the operating lever with both hands and was shaking it desperately.

At the same time, he kept cursing Jiang Chen loudly.

This little bastard is going too far.

Haven't learned to walk yet.

Now I dare to run.

You start out by doing the Hartmann roll.

You really don't know whether to live or die.

But Jiang Chen turned a deaf ear to Liu Xiyuan's "curses".

He was seen holding the operating lever with one hand.

While pressing the lever to the right, push the operating lever forward all the way.

At the same time, the right foot has already pushed the pedal to the bottom.

So the plane is like a spin stall

——The nose of the plane was facing down and the fuselage began to roll continuously.

Dive!

roll!

In less than half a minute,

The plane's altitude had dropped sharply from more than one thousand meters to about five hundred meters.

Dive speed.

It even exceeds the speed of free fall.

This can be seen.

The negative G brought about by this maneuver has exceeded 6G.

Even the two people sitting in the cockpit of the plane are not ordinary people.

But just thirty seconds caused both of them to have congested brains and feel very uncomfortable.

At one point, Liu Xiyuan even lost the ability to continue swearing.

But just when the plane was about to lose control, Jiang Chen immediately pulled the control stick upward and directly pulled up the nose of the plane.

The fuselage instantly returned to level flight.

The engine continued to roar at a deafening pace.

It whizzed past the airport.

This scene.

It really stunned everyone in the airport.

Tarmac.

All the pilot trainees looked up, facing the dazzling sunlight, and watched the CJ-6 approaching the airfield without blinking.
tower.

Several major officers.

Now they were all stunned where they were.

He looked at the CJ-6 whizzing past not far from the tower with an unbelievable look on his face.
Until the CJ-6 climbed to a higher altitude again and flew farther and farther away.

Only then did several people come to their senses.

"Fuck, Hartmann roll? Captain Liu is having so much fun today?" The officer holding the telescope opened his mouth wide, with disbelief written all over his face.

The major officer next to him was also surprised, "Damn, an old bird is an old bird, even if he is injured, he is much stronger than an ordinary person."

"Oh my goodness, this is a Hartmann roll," the captain exclaimed. "I've been flying for six or seven years, and this is the first time I've seen a Hartmann roll that's so smooth."

"Did you record what Liu Tuan did just now? It would be a great teaching material for training rookies."

However, these officers shouted and said it was very exciting.

Liu Xiyuan, who was sitting in the front row of the plane cockpit, was having a hard time.

Even though the plane has now changed to a level flight attitude, Liu Xiyuan still has a splitting headache due to congestion in his brain.

(End of this chapter)