Supersonic fighters are common.

But supersonic commercial airliners are very rare.

I guess many people will think that it doesn't exist at all. At least, not at the moment.

In fact, in the history of mankind, there have been two supersonic airliners that have actually been put into commercial use.

One is the famous Concorde. Jointly developed by the United Kingdom and France. The maximum speed is around Mach 2. When flying at supersonic speeds, the nose temperature reaches 127 degrees Celsius.

One is a polar bear's Figure 144. This guy is an absolute freak. To say that it is a commercial airliner is obviously a bit underestimating it. In fact, more often than not, it resembles an ultra-long-range strategic bomber. It has a staggering 207 tons of take-off weight and a maximum speed of more than Mach 2.35. Faster than a lot of fighters!

This isn't a commercial airliner at all!

It was made a cameo by a fighter jet!

All other commercial airliners fly at subsonic speeds. It is about 600 kilometers per hour.

So why are supersonic aircraft short-lived?

There are many reasons for this.

First, the cost is high.

Second, poor security.

"The cost is high, and there are two aspects. ”

"The first aspect is the high manufacturing cost of the aircraft itself. ”

"The second is the high cost of running a business. ”

Shangguan Yuqiang read the book according to the information.

Flying at supersonic speeds can lead to a lot of problems.

First of all, the requirements of the engine are very high. The various performance parameters are very demanding.

Secondly, there is the high cost of materials for the construction of the fuselage. A large amount of titanium alloy must be used. Or maybe it's high-end carbon fiber. As a result, the cost continues to skyrocket.

For example, just the material of the fuselage, you can't use ordinary aluminum skin. Because when flying at supersonic speed, the fuselage rubs against the air, which will cause the fuselage to heat up. The Concorde has been tested and the nose temperature can reach 127 degrees Celsius. And the temperature of the fuselage is also more than 90 degrees. Obviously, it had to use high-temperature insulation.

Don't think that only the interior of an airliner can cause a fire. The high temperature on the outside is also a very big hidden danger.

If you don't keep the temperature out tightly, something will happen sooner or later.

In fact, supersonic airliners have had accidents many times.

Whether it is the Concord or the Tu-144, there have been many air crashes with heavy casualties.

On June 3, 1973, at the Paris Air Show in France, the "Concorde" aircraft performed a flight show with the Tu-144, the world's only two supersonic passenger aircraft. After the last passage of the Tu 144, during the climb, it suddenly turned into a violent dive, and then the aircraft disintegrated in the air, killing 6 crew members and 8 people on the ground, as well as the random Tu 144 chief designer, Vladimir Lianderov.

On May 23, 1978, an improved Tu-144D was tested, during the ignition of the ground start, the fuel pipeline was ruptured, after the aircraft took off, due to a large amount of fuel leakage, there was a fire at an altitude of 3000 meters, the plane turned back urgently, 3 of the 4 engines were stopped, the cockpit was also full of smoke, the pilot responded calmly, and successfully landed on a flat ground with the belly grounding. Two flight engineers were killed in the 8 crew members. After this accident, the passenger transport service of Figure 144 was completely suspended.

And the Concorde crash was even more devastating.

On 25 July 2000, during takeoff, the Concorde airliner AF4590 ran over a small iron bar that fell off another Continental Airlines DC10 on the runway, causing a puncture, and the tire fragment hit the fuel tank in the wing at a high speed exceeding the speed of sound. A fire then broke out, causing the plane to explode and crash into a hotel near the airport just minutes after takeoff. This was the only major accident during the Concorde's service. It was also the first-ever supersonic jet airliner crash, a tragedy that claimed 113 lives.

After this accident, the Concorde also withdrew from the passenger market.

Of course, the accident was not the main cause.

Other subsonic aircraft, there are also a lot of air crashes.

For example, there are quite a few Boeing 747 air crashes. But it's also the most mainstream airliner.

What led to the withdrawal of supersonic airliners from the market is actually the cost.

Fuel costs, in particular, are indeed too high.

In the pursuit of supersonic speed, the power of the engine must be great.

The more power, the greater the fuel consumption.

The higher the fuel consumption, the higher the cost of the flight, which will inevitably lead to a skyrocketing ticket price.

For example, the price of a ticket from New York to London was as high as $9,000 for the Concorde in the past. And there's never a discount.

Dollars!

Nine thousand dollars!

It's $9,000 for a plane ticket!

It's still 9,000 dollars a few decades ago! Today, it's definitely 100,000 yuan.

How many people will be able to get up? It is inevitable that there will be no seats.

Over time, the airline lost so much money that it didn't want to continue operating.

In addition, the supersonic airliner itself is expensive.

The Boeing 737 airliner is only $76 million.

And the price of supersonic airliners is more than 50 times higher.

The subsequent fuel cost is also more than 50 times higher. In some cases, even more than 100, or 200.

The fuel cost of supersonic flight is often twice as high as that of subsonic flight, or several times more.

With such a high price, it is almost impossible to recoup the cost.

However, the Boeing 737 is very fast.

It sells well and has relatively low fuel costs.

As an aside, the Boeing 737 was the first jetliner in the world to reach 10,000 units.

The latecomer Airbus A320 is in front of it, and it is at the level of pediatrics.

"What is the pre-sale price of the C919?"

"An average of fifty million dollars. ”

"Really?"

"Yes. ”

Wang Buan nodded slowly.

50 million dollars! The price of a Su-35 fighter.

Compared with the 76 million US dollars of the Boeing 737, it is indeed a lot cheaper. This may help it get a lot of orders.

However, the manufacturing cost of C929 can be further compressed.

Especially when it comes to the engine.

The price of a single 125 engine is only one million dollars.

The first stage of the two engines is only two million dollars.

Compared to CFM's engines, the price is less than one-tenth, which is simply a free gift. Don't want money.

The engine alone can compress at least $5 million.

The entire power system can also be compressed by 5 million US dollars.

In other words, the final selling price of the C929 may be around 40 million US dollars. That's about half the size of the Boeing 737.

The last one is safety.

Supersonic airliners use a lot of new technology.

Some new technologies may be immature and flawed, and the results are magnified.

At the same time, because the speed is too fast, once an accident occurs, the consequences are often extremely serious. The same is true for highway car accidents.

However, it must not be said that the safety of supersonic airliners is worse than that of subsonic airliners.

In the final analysis, it is a question of economic interests.

Capital says it well:

If there is a profit of 20, capital will be ready to move.

If there is a profit of 50, the capital will take the risk.

If there is a profit of 100, capital dares to risk hanging its head.

If there is a profit of 300, capital dares to trample on all the laws of the world. Murder and arson are not a problem.

So......

"Make money!"

"Make money!"

"Make money!"

That's the number one priority.

It's not about making yourself money. It's about making the airlines money.

As long as airlines can make more money, all kinds of orders will naturally come one after another.

Speed isn't really an issue.

The key is to save costs!

The biggest cost of a commercial aircraft is fuel.

There is no fuel cost, and the air ticket can be reduced to less than 500 yuan for the route from Yangcheng to the capital.

There are no fuel costs, and the price of the flight from Modu to New York can be reduced to less than $500. That's about one-third of what it was.

Why is COMAC in such a hurry?

Because this is a blank air freight market!

As long as the C929 is produced, it will be frantically snapped up by major airlines.

Now all airlines are tormented by high oil prices and are about to go crazy. They must be driven to reduce operating costs at all costs.

It can be inferred from this that the export market is also very vast.

Who doesn't want an airliner that doesn't need fuel costs?

However, in this matter, COMAC itself was in a hurry.

Why?

The engine is in Wang Buan's hands.

All issues related to the engine have to be signed and agreed by Wang Buan. It must be endorsed by Wang Buan.

Otherwise, if something goes wrong, no one can afford it.

"Mr. Pei is here. ”

"Who?"

"Mr. Pei, please!"

"Good. ”

While pondering, Shangguan Yuqiang came in with a person.

Wang Buan looked up and was startled.

He hurriedly stood up.

Pei Yaoxian!

It's actually Pei Yaoxian!

Minister Pei ......

It turns out that he is the leader of the Ministry of Aerospace Industry!

"Little one, you haven't forgotten me, old fellow. Pei Yao said happily.

"How dare I. Wang Buan obediently offered a fragrant sycophant, "I forgot who I am, and I don't dare to forget you, old man!"

"Good, good, good, I love to hear that. ”

"You may be seated. ”

Pei Yao sat down first.

His body is still relatively tough. Healthy.

It's just that there are some scars on the body. It feels like I've fought with someone. It's still a very brutal fight.

Imagine a little bit, I feel that he can survive, it is really very blessed!

"Oh. Bagatelle. He spent ten years in southern Xinjiang. Pei Yao said first.

"Ten years?" Wang Buyan smacked his tongue secretly.

"Pretty much. I went before I started. I didn't come back until the ceasefire was officially signed. ”

"Oh. ”

Wang Buyan secretly admired.

It's all old bones crawling out of the pile of dead people!

It is not easy to stay in the war-torn southern Xinjiang for ten years and come back alive.

Huang Ruoxi's grandfather is like this.

Pei Lan's grandfather is the same.

Even Zhou Xiaoqi's grandfather is like this.

I feel that that generation has indeed paid a lot. None of them are fuel-efficient lamps.

No wonder Long Zhenyu would be on the street so quickly.

He was angry with the people.

Mobile Station: