Books tell us that the airplane was invented by the Wright brothers, but have you ever thought that in tens of thousands of years of human history, no one has tried to fly?
According to archaeological findings, on the rocks of the Donate Valley in Habahe County, northwest Xinjiang on the mainland, archaeologists have found a number of suspected airplanes, flying saucers, and rocket patterns, and after scientific testing, it has been found that these rock paintings containing flying machines have a history of tens of thousands of years.
As for what these pictures are, there is no exact information to corroborate, archaeologists can not judge, perhaps ancient times are really too far away from us, but in ancient times with traces to follow, we have a lot of information to prove that Chinese has a lot of actions in the sky, now, the author takes you to see the exploration of ancient China in this regard, as well as the safety of domestic large aircraft C919, engines and other issues.
Bamboo dragonfly
Bamboo dragonflies, yes, are the bamboo dragonflies you played with as a child. According to historical records, there were bamboo dragonflies in the Spring and Autumn Period, which were introduced to Europe in the 18th century, and the first aviation research of the British "father of aviation" Zhi Kelly was to imitate and improve the "bamboo dragonfly" and analyze the working principle of the propeller.
kite
Kites, known to the ancients as kites. As early as the Spring and Autumn and Warring States periods, wooden kites appeared in China. According to research, Mo Zhai, a native of the Eastern Zhou Dynasty, "spent three years making kites out of wood and soaring into the sky." Roughly calculated, Mo Zhai's wooden kite is 2400 years old.
In the Eastern Han Dynasty, Cai Lun's papermaking technique began to be popularized in the market, and the paper kite was also spread in the northern regions of the mainland.
According to the "Du Yizhi" compiled by Li Kang in the Tang Dynasty, Emperor Wudi of Liang used kites for military purposes to convey news. In the 13th century, during the war between the Mongol army and the Jin Dynasty army, the Jin people once flew kites, and attached leaflets to the kites to encourage captured soldiers to defect; Using the principle of kite gliding, when the kite flew over the prisoner of war camp of the Mongol army, they cut the thread and spread the leaflets.
The recorded manned kite dates back to the Northern Qi era, and the official history of the Northern Qi emperor Gao Yang's planned killing of the Tuoba and Yuan families is as follows: He had death row prisoners tied to large bamboo mats as wings, and made them fly from the top of the tower to the ground, called "release".
Of course, the pictures of kites flying over the city wall and storming the city on costume TV are not uncommon, but these are TV plot sketches, even in real history, its authenticity is no longer verifiable.
Kong Ming lantern
After the invention of Kong Ming lantern, it was not civilian at the earliest, but military. During the Tang and Song dynasties, Kong Ming lanterns were successfully used in the military field, and until the late Qing Dynasty, Kong Ming lanterns were an important tool for directing operations and transmitting intelligence.
The ancients' exploration and use of the sky has never stopped, and the rockets made of gunpowder originally invented by the mainland were launched by manpower with bows, and later, people invented rockets that directly used the power of gunpowder to propulsion. This kind of rocket is recorded in the "Song Shi Bingzhi": "Shi Bingbu ordered Shi Feng Ji to be promoted to the rocket method, ordered to test, and gave clothes and restraints. "There are also historical records that in 1126, the Jin army attacked the capital of the Northern Song Dynasty, Bianjing (present-day Kaifeng, Henan), and the Song army fought with rockets, causing great lethality to the Jin army.
Of course, these are the past, the reason for listing this information, the author just wants to tell you, in the exploration and use of space, Chinese is no worse than foreigners, not less than foreigners, but after the late Qing Dynasty, national strength declined, long-term war made us abandoned by the world's science and technology, now catch up, we should refuel Chinese aircraft.
About C919
c919
The C919 program began in 2008 to build a jet civil aircraft that would break the duopoly of Airbus and Boeing. After many years of development and many delays, the aircraft made its first test flight at the end of 2017 and was officially put into service today. Mainly made of aluminum alloy and powered by CFM International's LEAP turbofan engines, the aircraft can carry up to 168 passengers in normal configuration and fly a range of up to 5,555 kilometers, comparable to aircraft such as the A320 and 737.
C919 and aircraft of the same type
About domestic production and security issues that are talked about online
From the moment the data of the C919 was released, public opinion about the localization of the C919 aircraft was overwhelming, and many people questioned "domestic large aircraft, why are the engines foreign?" "Is this really domestic, except for the shell?" "As soon as other countries ban it, this plane can only lie down", "Let the leader sit first!" "and other remarks continue to spread on the Internet, and even many people say that it is better to find Boeing or Airbus for the foundry.
So, what's going on?
Now, let's talk about the problem of localization first, before talking about this problem, there are two pictures for everyone to see.
Source of Boeing aircraft parts
The first is the world-famous American Boeing Company, the source of its aircraft parts.
C919 parts composition
The second is the parts supplier of the C919 aircraft sorted out by netizens.
Parts and components:
The author said an objective and fair word, looking at the whole world, no country in the world can produce all the parts of an aircraft.
Motor:
Our domestic engine business is indeed slightly backward, but all netizens who pay attention to China's aircraft engine cause know that these more than ten years of catching up, we have made great achievements in the field of engines, Yun-20 military transport aircraft replaced with turbofan 20 engines, this is to slap those who pretend not to see the progress of China's aircraft engines, and now the C919 aircraft equipped with the Yangtze River CJ1000A engine is also catching up to test flight, the engine is the heart of the aircraft, The state and R & D personnel will not allow our own large aircraft lifeline to be controlled by others, it is only a matter of time before the domestic engine is replaced, moreover, the results of the current test of the Yangtze CJ1000A do not have to be worse than the same type of engine.
Security:
One of the most popular phrases circulating on the Internet today is: "Let the leader sit first!" ”
Regarding this matter, the author gives an example: when the Harmony high-speed railway was not yet trialed, it was also said on the Internet, until the first commercial operation of Harmony, there were many people who spoke and asked "leaders to sit first" and "I can't sit!" "Wait, however, who can pat their chest and say that China's high-speed rail is not safe today?"
Any aircraft manufacturing, is a national project, even Airbus, is also the entire European Airlines is doing, our C919 project, by the state project, is to compete with Boeing and Airbus, the state in this regard, can not be simple, will inevitably carefully control every manufacturing detail, before delivery to the airline, will also undergo strict and extreme flight tests, only to obtain the review of the relevant departments, can be delivered to the airline, and the airline after getting the aircraft, After many inspections, all aspects must meet the requirements of commercial flight, and only then will it be truly open to commercial operations, and relevant leaders, engineers, including aircraft research and development personnel, have long been on the C919 aircraft, do you really think that the country will take such a major project as a child's play?
The inaugural flight of the C919
The inaugural flight of the C919
On the 28th, the first commercial flight of the domestic large aircraft C919, China Eastern Airlines MU9191, departed from Shanghai Hongqiao Airport in the morning, taking 2 hours and 25 minutes, and landed safely at Beijing Capital International Airport.
The commercial maiden flight of the C919 can be described as a moment to go down in history, except for some R&D personnel, who were randomly selected from more than 14,000 passengers, did they not know the safety issue?
No, because they know how to trust the Motherland better!
And the ticket of the first flight of C919 will surely become a precious souvenir!
US Federal Air Traffic Authority: Refusal to issue C919 airworthiness certificate European Aviation Safety Agency: Refusal to issue C919 airworthiness certificate You can suppress me and sanction me, but you can't stop my motivation and soaring.
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