The hovering of the helicopter is not simple.

It's not your average parking. A few actions can be done.

When the helicopter hovers, there is no support in the front, rear, left and right, and it is completely supported by air flow. The demands placed on both the engine and the rotor are very high.

Just because you can fly to an altitude of 6,000 meters does not mean that you can hover at an altitude of 6,000 meters.

Generally speaking, the hovering altitude of a helicopter is about three or four thousand meters. It is also necessary to distinguish between those with and without ground effect.

Ground effect hovering means that it is relatively close to the ground, and can increase the lift of the helicopter with the help of the reflection of the air flow on the ground. This hovering generally does not require much effort. The engine is not loaded.

Hovering without ground effect means that it is at high altitude, far away from the ground, there is no air flow reflection on the ground, and it is completely dependent on the engine output.

At this time, the engine often reaches the maximum load state. It is the most testing of engine performance.

If you're loading heavy loads, hovering is even more difficult.

For helicopters, hovering is the most critical link.

If you can't hover smoothly, it's not a helicopter. It can be thrown away.

One of the most important training subjects of the Army Aviation Regiment is also hovering.

Usually, Cheng Xiaoshan hovers at an altitude of three or four thousand meters, and rarely exceeds four thousand meters.

After all, hovering at high altitudes can do a lot of damage to the engine.

In addition, fuel consumption is also very large.

Now, being able to hover at an altitude of 7,000 meters is simply incredible.

"Record the data!"

"Be sure to record the data!"

Cheng Xiaoshan said excitedly.

Of course, someone recorded all of this.

All kinds of data were also quickly uploaded to the Army Aviation Department of the General Staff.

Instructions from superiors also came quickly: to test the performance of the engine as much as possible while ensuring safety.

The on-site test work was made by Wang Buan.

If necessary, part of the airspace can be cleared. An application for this matter has been made to the Air Force.

"Chief Engineer Wang, what is the maximum hovering time?" asked Cheng Xiaoshan cautiously.

"You can stop for as long as you want. Wang Buan replied casually.

"Doesn't the engine overheat?"

"No, it won't. ”

Wang Bu'an responded lightly.

Superheating?

Inexistent!

At most, it is four or five thousand degrees Celsius.

However, the ZM-100 turboshaft engine he built can withstand temperatures of 30,000 degrees.

Seriously, the raw materials are a bit wasteful now!

Such a high-end raw material should not be used on the earth.

With a high temperature of 30,000 degrees, it is almost possible to establish a safe military base on Mars. Not at all afraid of cosmic rays.

Used to make an engine, it is definitely overkill.

Luckily, it doesn't cost money.

No need for nothing.

Cheng Xiaoshan continued to hover.

He was going to test the maximum hovering time of the engine.

30 minutes ......

60 minutes......

90 minutes ......

Gradually, it was evening.

It's almost time to eat. Du Yande arranged for everyone to eat.

The food in the Air Force has always been good. A group of people are eating with relish. It's just pitiful, and I'm the head of the group. He continued to hover in the air. I still have to hold my pee.

120 minutes ......

180 minutes......

240 minutes......

5 hours passed......

6 hours have passed......

The helicopter is still in good condition, there are no problems at all.

The engine also apparently did not overheat in any way. There is no problem with stability and reliability.

However, Cheng Xiaoshan himself couldn't support it. After all, it's flesh and blood, and it's been holding out for six hours. Hungry and cold. I still have to hold my pee. It feels like your bladder is going to burst.

At an altitude of 7,000 meters, it is still very cold. Especially at night. The temperature is almost freezing!

Even in a flight suit, it was very uncomfortable.

After all, the flight suit of the army aviation regiment is not the same as that of the air force fighters.

The Army Airlines claims to be the fifth space. The general activity area is less than 300 meters. Yes, you read that right, it's under 300 meters.

This space is called ultra-low-altitude. It is a blind spot for many radar detections. At the same time, it is also an ultra-low-altitude area that many fighters cannot reach. The only one that can occupy this space is a helicopter. Whether it is a low-altitude raid or a lurking standby, the ultra-low altitude gives the helicopter very good stealth conditions. Helicopter gunships are the hegemons of the fifth space.

Most of the time in the army aviation, it is training for ultra-low-altitude raids. There are not many real high-altitude flights.

That's the sky for fighters and bombers. Helicopters are cannon fodder when they go up.

Naturally, there is no need for the flight suit of the Army Airlines to resist the cold.

Seven hours passed......

Eight hours passed......

Cheng Xiaoshan finally couldn't bear it anymore and had to return.

Land safely.

Doctors are on standby.

Thankfully, nothing was a big deal. It's just extreme exhaustion. Dehydration and destrengthening.

After a little treatment, Cheng Xiaoshan was alive again. He quickly reported to his superiors, and at the same time discussed with Wang Bu'an to test more projects.

"What do you want to do?" Wang Buan said casually.

"Get a tank up?" Cheng Xiaoshan whimsically.

"Won't it?"

"The Type 59 tank should be fine, right?"

"It's fine. ”

Wang Buan replied in the affirmative.

If it's a Type 59 tank, it's definitely fine! It's just over 30 tons.

The modified Bell 407 has a maximum take-off weight of more than 60 tons. For this, Wang Buan is very sure.

If necessary, the 99A tank is capable of lifting. Not to mention the Type 59 tank?

The key now is that Cheng Xiaoshan can't continue to fly.

He was already tired.

I feel like uremia is going to come out. What an iron-clad man.

The pilot had to be changed.

Deputy head of the regiment.

The deputy regiment commander is also a master of flying.

He was well prepared.

He changed into a flight suit for the Air Force. Prepare for long tests.

Just do it. After obtaining the consent of the superiors, a heavy Type 59 tank was really transferred.

The ground crew used oversized steel cables to hang the tank.

The deputy regiment commander took off with a helicopter.

The steel cable is tightened.

Adjust the balance.

Start climbing.

The Type 59 tank was easily lifted off the ground.

This big guy, known as the king of the land, is bigger than the Bell 407. But it was still easily pulled up.

Soon after, the tank was hoisted to an altitude of seven thousand meters. Then hover.

The main test item is hover time.

Indirectly, it is also to test the stability of the engine.

Long-term hovering is a great challenge to the stability and reliability of the engine.

In daily flight, the requirements for the engine are not very high.

A long period of hovering is the fatal test.

If there is a problem with the engine, when hovering, there will be surge, swaying, jolting, howling and other conditions.

"Let's go to sleep. ”

"Okay. ”

Du Yande personally took Wang Buan to the guest room and arranged for him to stay.

The current Wang Buan is definitely a VIP among VIPs! He is even more of a national treasure than a national treasure.

"You get Cheng Xiaoshan's approval. ”

"You gain 80 million Faith. ”

"You have the approval of Du Yande. ”

"You gain 80 million Faith. ”

That's the best proof of this.

In addition to the two of them, there are other people's.

The continuous income of faith points soon exceeded one billion in the balance of faith points.

This time, Wang Buan did not use it.

When he is ready to accumulate 10 billion, he will apply for a marine industrial park.

We need to continue to add some material to the world.

We need to get other countries to act.

Otherwise, how can the arms produced in China be sold?

The barracks are very quiet, and it is naturally very comfortable to sleep.

secretly manipulated the two marine industrial parks, and wanted to continue to make trouble, but he didn't find a chance, so he had to obediently hide back in the depths of the ocean.

Yu Meilan also seems to be dead. I don't want to talk to Wang Bu'an anymore. A man sat stunned.

When I woke up in the morning, it was already past seven o'clock.

Get up. Wash.

Come out for breakfast.

By the way, I asked about the situation at high altitude.

The deputy head of the regiment has been hovering for six hours. The test continues. There are no special circumstances for the time being.

Cheng Xiaoshan also transferred people from the army aviation regiment overnight to prepare to continue the test.

It's all about the rhythm of restlessness.

"Chief Engineer Wang, I also calculated the cost of the flight last night. Cheng Xiaoshan said excitedly.

"Is there a cost of fuel?" Wang Bu asked nonchalantly.

"Yes. ”

"How much?"

"During the time I flew alone, I had more than 200,000 yuan. ”

"Really?"

Wang Buan was noncommittal.

If you burn oil, it will definitely cost a lot.

To impact to an altitude of 11,000 meters, it requires very high fuel costs. Probably several times more for low-altitude flight.

Later, when hovering at high altitude and hoisting a heavy object of thirty tons, the fuel consumption was even greater.

If it's burning aviation kerosene, it's all money!

"Our regiment's fuel expenses are only a few million a month," Cheng Xiaoshan said with emotion, "but we can't afford to withstand such a toss." ”

"Now, you can enjoy it to the fullest. Du Yande said, "Hurry up and practice your hands." ”

"Of course. ”

"You kid!"

"Chief Engineer Wang, someone from the Army Aviation Department of the General Staff is coming today. ”

"Who?"

"Vice Minister Nie Chuan. ”

"Oh. ”

Wang Buan nodded.

In fact, he didn't know who the other party was.

However, since it is from the Army Aviation Department, it should be an authoritative figure.

It is estimated that the ZM-100 is going to accelerate the development process.

The people of Lu Airlines obviously couldn't wait.

They were eager to immediately replace the ZM-100 engine.

Cheng Xiaoshan is right, that's all heavy silver! If you change your clothes one day earlier, you can save a lot of money one day earlier.

The ZM-100 engine can fly 24 hours a day.

Other engines can't do that.

"By the way, Chief Engineer Wang, how long is the life of the new engine?"

"A hundred years. ”

"How much?"

"It's a big, big number anyway. You can't run out of things. ”

"Won't it?"

"Anyway, you can use it with confidence. ”

"That's good. ”

Cheng Xiaoshan was finally relieved.

I was worried about the life of the engine. Unexpectedly, it was an infinite lifespan.

Unlimited Range......

Infinite life......

This is completely against the rhythm of the sky!