What is the speed of Mach 5?

That's 6,000 kilometers per hour!

That's 102 kilometers in one minute!

That's 1,020 kilometers in 10 minutes!

How far is the Okinawa base from Huaxia? Guam is not that far! It is only 3,000 kilometers.

You can kill Guam in half an hour!

You say, what can the garrison do if a large number of fighters attack?

Half an hour, can you react?

Dangerous!

It's too dangerous!

It's the rhythm of the catastrophe!

This is still a fighter with no stealth ability, which can give early warning.

If it's invisible......

Then there is no way to imagine.

No way!

It's too dangerous!

There must be countermeasures.

Otherwise, the entire western Pacific Ocean will be shrouded in the shadow of Mach 5 fighters.

Remembering the MiG-25 shadows of yesteryear......

Could it be that the ancient Jian-8 has actually regained its glory?

"Li Tonghe, how is your situation?"

"In good condition. ”

"Is there black vision?"

"Nope. ”

"Is there red vision?"

"Nope. ”

"How much is the current overload?"

“7.2G。 ”

"Please maintain your cruising speed. Don't speed up. ”

"Understood. ”

Liu Zhenhua beckoned and asked Wang Bu'an to come over.

The test pilot did not have black vision, did not have red vision, indicating that he was in good condition. Explain that the overload can also be withstanding.

The so-called black vision is that the load is too large, the blood supply is insufficient, and the eyes are dark.

The so-called red vision means that the load is too small, the eyes are congested, and it feels like everything is red.

Whether it is black vision or red vision, it is a danger signal.

If it does, you must immediately reduce your speed and return home.

"Are you still speeding up?" asked Liu Zhenhua.

"You decide. Wang Buan replied cautiously.

"Next time. ”

"Good. ”

Wang Buan has no opinion.

Sometimes, there are many aspects to consider.

The speed of the No. 1 flight at Mach 5 was enough to shock the whole world.

If you throw all your hole cards out now and fly at Mach 8 speeds, you will be wasting a shocking opportunity.

In the past, there was a pole vaulter in the Soviet Union who raised 1 centimeter in each competition. 125 The same can be done.

When the time is right, fly out of Mach 6, Mach 7, and Mach 8 to achieve the purpose of deterring strong enemies.

Technology is at the service of the military. The military, in turn, serves politics.

"The leader has decided to give you a special credit. Liu Zhenhua said solemnly.

"Can it be exchanged for cash?" Wang Buan said in a low voice.

"No, you can't. ”

"Forget it. ”

"However, it can be included in the funding of the 220 Institute. ”

"What do you mean?"

"The 220 Institute will receive two billion in scientific research funding. ”

"Really?"

"Do you think the leader is joking?"

"Oh. ”

Wang Buyan touched his chin.

Looks like you've been set up again?

Ginger is still old and spicy. All the leaders are masters of the next set.

Two billion seems very tempting. In fact, it is equivalent to tying yourself firmly to the chariot of the 220 Research Institute.

If you take the money, you have to do something!

If you don't do anything with money, Wang Bu'an doesn't want to go.

With so much money, if you don't make a little achievement, are you worthy of so much money?

Do you want?

Absolutely.

Do you want the money you get?

Otherwise, you will pay the staff out of your own pocket!

There is no such reason.

Unit 1 is still hovering in the sky.

It was so fast, the radius of the hovering was very large, and it had to be air control.

For safety reasons, civil aviation passing through this airspace has been rerouted.

An hour passed, and the number one continued to circle.

Two hours passed, and the number one continued to circle.

This is to test the durability of the engine. It takes hours on end.

Originally, if it was an ordinary test, Li Tonghe should have landed. However, the various parameters and state are good at the moment, and I don't mind staying in the sky for a long time.

Air crashes don't just happen when they happen. There will definitely be various signs. If you find something wrong, land immediately.

The current altitude is 15,000 meters, and it is not difficult to land safely.

As long as it is not an extreme situation such as stall tailspin, the pilot can skydive.

"Let's get moving. ”

"Let's move your muscles. ”

The people in the tower all came out one after another.

At this time, the No. 1 machine had no other test tasks, only monotonous hovering, and there was no need for onlookers.

Wang Buan also came out of the tower. Toilet. It's like a shot.

Look around, it's boring.

Not a single acquaintance.

I don't know where those old guys have gone to hide. I didn't see them at the tower.

It's better to go back to the tower and be more comfortable. Air conditioning was powerful.

At this time, the No. 1 aircraft continued to cruise.

The monitoring data transmitted back shows that the temperature of the surface skin of the aircraft is already as high as more than 450 degrees.

If it's an aluminum skin, it's probably already melting.

Thankfully, it's high-performance stainless steel.

The thermal barrier is indeed an obstacle to the road! It restricts the speed of fighter jets in many countries.

"Keep it at the current pace. ”

"It is strictly forbidden to continue to increase the speed. ”

From time to time, the tower issued cautious instructions.

This is to prevent Li Tonghe's subconscious acceleration. If you are not careful, it is possible to break through Mach 6.

Monitoring data shows that the current engine speed is only 6000 rpm. There is still a certain distance from the maximum speed of 8000 rpm.

In case Li Tonghe sees Hunter Xinxi, it is easy to involuntarily disobey the order and accelerate the plane to Mach 6.

6. Will there be any problems with Mach? Wang Buan thinks not.

However, Liu Zhenhua and others were a little worried.

After all, this speed is really amazing.

Before the test flight, the maximum speed given by Wang Buan was Mach 8. This is the ultimate speed.

The ultimate speed is not a safe speed.

The safe speed is generally about two-thirds of the limit speed.

If it's cruising speed, it's best to keep it at about one-third of the limit speed.

For example, the J20 can reach a maximum speed of Mach 2.3. However, it is better to maintain a cruising speed of Mach 0.8. Safe, economical.

Like the No. 1 aircraft, it has always maintained a cruising speed of Mach 5, which is actually not very scientific.

However, considering the construction principle of the 125 engine, it is no problem.

Mach 5 is a relatively safe speed.

Actually, 125 has enough thrust.

What is its speed limit?

Including Wang Buan, there is no accurate data.

You know, different aircraft are paired with different speeds.

Even if the same type of aircraft is carrying different weights, it is difficult to determine.

Why is test flight data so valuable?

It's just a lot of first-hand information.

No matter what theoretical calculations are, it is better to fly up on the ground.

It seems that the No. 1 aircraft has been flying in the sky for more than three hours, and the relevant data has been improved a lot.

At least, it has been fully verified, and Mach 5 is a safe speed.

In the future, a fighter equipped with 125 will be able to easily fly Mach 5.

"Aircraft No. 1, return. ”

"Unit 1 understands. Return immediately. ”

The tower gives the command.

Aircraft No. 1 began to enter the return procedure.

The speed is constantly decreasing.

The height is constantly decreasing.

Soon after, it appeared in the telescope.

Then, like a strong cheetah, it landed heavily on the runway. The parachute opened, and after gliding for some distance, it slowly stopped.

All the testers immediately flocked to inspect and migrate all kinds of important data.

There are also special testers who look for scars on the exterior of the aircraft.

Liu Zhenhua and Wang Buan also came to the edge of the runway.

Li Tonghe was coming out of the cabin.

"How do you feel!" Liu Zhenhua asked with a smile on his face.

"Very good. Li Tonghe replied loudly.

"Good. ”

"Thank you. ”

Li Tonghe's mental state is very good.

He cruised in the sky for four hours and flew a full 20,000 kilometers, and he still felt very energetic.

The fact that the plane did not fail in any way is the greatest encouragement.

He was then picked up and taken to fill out a test flight report.

It is estimated that this test flight report will be treasured by the Aviation Museum in the future.

The first test flight report with a flight speed of more than Mach 5.

The first test flight report with a flight mileage of more than 20,000 km.

Either way, it's enough to be proud.

Before you know it, the No. 1 aircraft has flown more than 20,000 kilometers, which is almost equivalent to half a circle around the earth.

Liu Zhenhua carefully observed the fuselage.

He carefully circled the fuselage several times.

No visible injuries were found.

Touch the ...... with your hands

It's very hot.

With a slight touch of the finger, it must be removed.

The test data shows that the surface temperature of the stainless steel plate is still more than 200 degrees.

It is estimated that there will be no way to return to normal temperature in three hours.

However, this temperature is nothing compared to the engine jet.

None of the inspectors dared to approach the engine's jet port.

That's a thousand degrees Celsius.

Don't say it's touching, even if you get closer, you can feel the heat wave.

According to the test data, the maximum temperature of the tail flame reached an astonishing 3,000 degrees Celsius. It literally destroys all metal.

Now, the plane has landed, and the temperature at the jet port is still above 1,000 degrees.

It is estimated that it will take six hours to return to normal temperature.

However, it has no chance of returning to room temperature.

Because, the second test is about to begin.

The fuselage parts are normal.

The avionics system is normal.

The powertrain is normal.

A second test can be conducted.

What does the second test do?

Flight altitude.

Maximum impact ceiling.

"Didn't it just land, why is it going to take off again, doesn't it need to be overhauled?" asked Han Xuewei worriedly.

"No problem. Wang Buan said lightly.

"Really?"

"Of course. ”

"Kong Lingwei!"

"Here!"

"Let's go!"

Level 3 test pilot Kong Lingwei entered the cockpit.

Unit 1 continues to start.

Flame Blast.

Everyone has long been far away.

Otherwise, the flames that shoot out can directly melt people.

"Maximum afterburner!"

"Shortest take-off. ”

The tower gives the command.

The tail flame of the No. 1 machine erupted even more violently.

It was like a frightened cheetah, scurrying forward frantically.

At a distance of less than 130 meters, the landing gear left the ground.

This is exactly the rhythm of carrier-based aircraft!

130 meters, enough to take off in a glide jump on an aircraft carrier.