The rise of nanometers

In April in Lingnan, spring has already bloomed in previous years.

It's just that this year's spring came a little more than half a month later, and the weather in early April was still warm and cold at first.

Dai Xiaohai and his wife, one holding their daughter and the other pushing a stroller.

The gentle breeze picked up a few kapok leaves. The leaves tumbled a few times and fell weakly to the road.

The period brought a bit of chill, but the seemingly thin shirt made Dai Xiaohai feel no discomfort. The multi-functional shirt on his body is this year's hottest civilian product.

Multifunctional shirts are a type of multifunctional clothing and are a simplified version of astronauts' daily clothing.

The development of the aerospace industry has never been an isolated system, nor should it be an isolated system. Transforming some aerospace technologies suitable for civilian use into civilian products is what Aerospace Science and Technology and Eagle Aerospace have been working hard to do.

Multifunctional clothing uses nano fabrics and special structures, as well as advanced semiconductor and material technologies, and its functions are very excellent.

It has a series of functions such as thermal insulation, heat dissipation, constant temperature, sweat absorption, waterproof, radiation protection, stab-proof, and bullet-proof.

It integrates a lot of functions, but the weight is almost the same as an ordinary shirt. It is not a hype product, but a genuine multi-functional garment.

Although this complete set of clothing starts with 700 credit points, it is very cost-effective.

Now that Dai Xiaohai lives in a subtropical area, the thermal insulation function of multi-functional clothing is not obvious yet.

In temperate and sub-arctic regions, especially the Northeast and Mobei, multi-functional clothing is warmer than a large sweater. Wearing multi-functional clothing in winter can withstand the impact of low-temperature environments and protect the user's health even if they are drunk outside. body temperature.

Of course, there are still many dangers if you don't have a full set of equipment, such as gloves and hoods.

Although human vital signs detection watches and bracelets have become very popular, they will quickly call the police if there is a problem with the user's body.

No matter how hard you say it, it's hard to persuade the damned person. Even today with such advanced technology, there are still many people who go out to drink in the winter and drink themselves unconscious.

Anyway, on the Internet, Dai Xiaohai often saw people drunk and passed out outdoors, and then had their limbs amputated or even frozen to death.

The emergence of multi-functional clothing only provides a safer guarantee.

For those guys who like to seek death, there is really no way to eradicate them.

After strolling on Kapok Avenue for an hour, the couple reluctantly sent their daughter back to the nursery. Then they took the tram and prepared to travel for a few days.

I went home, picked up my things, and headed to Baiyun Airport with my suitcase in hand.

The passenger flow of Baiyun Airport is relatively large, because this airport is an international airport and one of the air transportation hubs in mainland China, Southeast Asia and Oceania.

The flight information in the lobby keeps scrolling.

Passengers going up and down are either traveling, going on business, or visiting relatives.

Dai Xiaohai and his wife have traveled to Southeast Asia, Oceania and other places in recent years, but considering that they only have four days left this time, they did not choose a place too far away, but planned to visit your province.

Many of the passengers around were in groups, and it seemed that most of them were traveling.

After waiting for more than an hour, the flight they ordered has arrived. It is a new domestic passenger aircraft owned by Spring Airlines. This is the first batch of commercial aircraft that just completed testing at the end of last year.

The aircraft was jointly built by COMAC and Suiren, and was code-named "Tengfei-2015". This aircraft was supposed to be launched in July last year.

However, Huang Xiuyuan later postponed the listing, mainly to modify some internal supporting facilities, which delayed it for more than four months.

Tengfei-2015 commercial aircraft is a large transport aircraft that uses a new generation of safe N30 fuel. N30 is an improved version of N20. Its energy density is similar to N20, but its safety is an order of magnitude higher.

The detonation rocket engine has also undergone a series of improvements and optimizations, not only reducing energy consumption by 3.7%, but also improving control accuracy and the resonance effect of detonation to a certain extent.

The maximum passenger capacity of this aircraft can reach 850 people, but after research, in order to ensure safety, the maximum passenger capacity is limited to 450 people.

After getting on the plane, Dai Xiaohai, who was flying on a domestic aircraft for the first time, looked around curiously.

The passenger cabin in front of me has a completely different style from previous Boeing or Airbus aircraft.

Each independent passenger seat looks a bit like a cylinder.

In fact, these passenger seats are independent escape cabins. Once the aircraft has an accident, they can be quickly closed and turned into an escape cabin.

The escape capsule is cylindrical and contains a seat, parachute system, buffer and flotation airbag system, life support system, communication system, etc.

This is why the passenger capacity, which could have accommodated 850 people, was cut by more than half just to install these escape cabins.

Although the transportation volume of airplanes is worrying, it is still the fastest and most convenient method of intercontinental transportation among the current means of transportation.

Especially for forces like Greater China, which have a huge control area, airplanes are still the fastest long-distance transportation method.

But a big problem with aircraft transportation is safety.

Even after countless tragic air crashes, there is still the embarrassing situation of plane crash and death. This is one of the reasons why Huang Xiuyuan and others rarely fly. Even if they fly, they can only fly on special planes.

So what is the reason for the low survival rate of civilian airliner accidents?

Is there really no way for civilian airliners to change this situation? The answer is obviously no.

If you can change the situation where you will die in an accident, why haven't aircraft manufacturing companies or airlines improved in this regard?

The answer is obvious.

Just one word - money.

After all, launch vehicles in the aerospace field all have escape towers, and it is impossible for a civilian aircraft, which is an order of magnitude less difficult, not to be able to build an escape capsule.

It can be done, but that doesn’t mean capitalists will do it.

Because the cost of an escape cabin is too high, taking the escape cabin of a passenger aircraft as an example, if everyone needs to be equipped with an escape cabin, the average comprehensive cost of each escape cabin will reach 1.34 million yuan.

There were 450 passengers (450) and 15 crew members on the take-off flight, a total of 465 people.

This requires an increase in costs of about 610 million yuan and a reduction of 400 passengers. For airlines, this is simply killing them.

It is only under the special circumstances of Greater China that it is possible to implement escape cabins to ensure the safety of every passenger.

It is basically impossible for foreign airlines to do this.

Of course, currently, Takeoff passenger planes can only fly within the control area of ​​Greater China, not because other forces have airworthiness certificates, but because N30 fuel cannot be leaked.

However, COMAC is already designing a fuel version of the detonation rocket engine. It is estimated that a fuel-powered passenger aircraft will be launched around 2018 for international flights.

In fact, it is still possible for airlines to recover their costs after purchasing takeoff passenger aircraft and putting them into operation.

Because the speed of a passenger aircraft can reach 1.3 times the speed of sound, the fuel cost for the same voyage is only about 21 to 26% of that of a fuel-fired aircraft.

In addition, the designed service life of the aircraft can reach 40 years. If it is well maintained and some parts are replaced, it can be extended to about 60 years.

In addition, because it is equipped with an escape cabin system, air tickets for take-off passenger planes are very popular. If the airline operates it properly, it can still make money.

Thank you for your support (ω｀)