On May 5, 2017 (April 10, 2017 lunar calendar), the first flight of the domestic large aircraft C919. The first large aircraft of the domestic large aircraft C919 took off. The first large aircraft of the C919 large aircraft was finally assembled and rolled off the production line. The domestic large aircraft C919 took off. The domestic large aircraft C919 took off at 14:00 pm on May 5, 2017. The new generation large jet passenger aircraft C919 with completely independent intellectual property rights in our country took off successfully on runway 4 of Pudong International Airport! As a large passenger aircraft focusing on the most mainstream air transportation market (150 seats), C919 is a trunk aircraft developed in full accordance with the international mainstream airworthiness standards and international mainstream market operation standards. The full name of C919 is "COMAC919". "COMAC" is the abbreviation of the English name of China Commercial Aircraft Co., Ltd. "C" is the first letter of COMAC and the first letter of China's English name China. The first "9" means everlasting and enduring, and "19" means my maximum passenger capacity is 190 seats. As a short- and medium-range commercial trunk aircraft with independent intellectual property rights in our country, C919 has very good performance indicators. The cabin arrangement of C919 is divided into mixed class and full economy class. The mixed class has 158 seats and the full economy class has 168 seats. Its standard range design range is 4075 kilometers, and the extended range design range is 5555 kilometers, which can meet the operation needs of airlines on different routes. The designed economic life is 80,000 flight hours/48,000 landing gear/25 calendar years. The maximum commercial load is 18900 kg, and the standard commercial load is 15010 kg. The cruising speed is 0.78 times the speed of sound, the maximum flight altitude is 12,131 meters, and the cruising altitude is 10,668 meters. The development of the C919 cockpit interior view inside the C919 cabin adopts the internationally accepted main manufacturer and supplier model. The main manufacturer is China Commercial Aircraft Company, which is responsible for design, development and final assembly manufacturing. In the aircraft structure, the central wing of the middle fuselage is made by Commercial Aircraft, the nose is from Chengfei, the front fuselage, middle and rear fuselage are from Hongdu, the wings are from Xifei, and the vertical tail is from Shenfei... 22 provinces and cities, 36 universities and more than 200 institutions in China participated in the development, and 16 international first-class suppliers served it. At present, the C919 large passenger aircraft has 23 domestic and foreign users such as Air China, with a total of 570 orders, including international customers such as General Electric Leasing (GECAS) in the United States. A total of 5 people in the first flight crew will be accompanied by an aircraft for the first time. It is understood that this first flight will be accompanied by an aircraft, which is the first time in the test flight of our national aircraft. The accompanying aircraft will enter the airspace of the first flight in advance and fly once along the first flight route to understand the wind, temperature, cloud conditions and other meteorological conditions at the height of the first flight to avoid dangerous weather affecting the flight. After the C919 takes off, the accompanying aircraft will fly with it and maintain communication, observe its rudder surface, landing gear, and whether there is oil leakage, etc., and provide altitude and speed references. In addition, if conditions permit, the crew of the accompanying aircraft will take external photography and video of the C919 to retain the image data of the first flight. According to Standing Rock, the C919 first flight crew consisted of 5 people. In addition to the captain Cai Jun and the co-pilot Wu Xin, the first flight test observers were set up. The observers will sit behind the two pilots, observe and judge whether their operations are accurate and reasonable, and provide guidance under special circumstances. The crew also includes two flight test engineers, Ma Fei and Zhang Dawei. They will sit in the cabin, record and interpret the parameters of the onboard test system, and coordinate with the pilot to prompt the pilot whether the flight test actions are effective. It is reported that the C919 flight test subjects totaled 729 items, planned to be completed in 4,200 hours and 2,282 sorties, and will be put into six aircraft for scientific research and certification test flights. Yu Liyan said that the follow-up aircraft will carry out power system tests, special meteorological special project tests, avionics, electrical appliances, electronic equipment assessments, and environmental control system tests. The ten-year "road to birth" of the C919 The C919 has undergone ten years from project establishment, design, trial production, final assembly, testing, and the upcoming first flight. What happened in this decade? In February 2007, the State Council officially approved the development of large aircraft major scientific and technological special projects. In May 2008, the Commercial Aircraft Corporation of China was inaugurated in Shanghai and headquartered in Shanghai. In November 2008, the C919 project was launched. In June 2009, AVIC Plaza Industrial Chengfei/Chengfei Civil Aircraft completed the demonstration and release of the general manufacturing process plan of the C919 engineering prototype. In September 2009, the C919 shape prototype was officially unveiled at the Asian International Air Show held in Hong Kong. In December 2009, the C919 engineering prototype was officially rolled off the assembly line. In November 2012, the C919 large passenger aircraft won 100 orders from 6 Chinese and foreign customers at the Zhuhai Air Show. In December 2013, the first head part of the C919 large passenger aircraft project was assembled and removed from the shelves. In July 2014, the first head section of the C919 large passenger aircraft was assembled and rolled off the assembly line at AVIC Plaza Industrial Chengfei Civil Aircraft. In September 2014, the first C919 large passenger aircraft officially started structural assembly work at COMAC Shanghai Pudong General Assembly Base. On November 2, 2015, the first domestic large aircraft C919 was unveiled. In December 2016, the first C919 aircraft of COMAC was delivered to the flight test center. In February 2017, the C919 has basically completed the installation of the airborne system and the main static and system integration tests, and entered the preparation stage for the first flight. In May 2017, the C919 officially made its first flight.