C919 Detailed design for the first time Exposure
C919 300x216 C919 Detailed design for the first time Exposure: comfort beyond the Boeing 737C919 designed to establish a five of requirements: to ensure the security, outstanding economy, improve reliability, improve comfort, emphasizing environmental protection. The first is critical to safety, followed by the airlines concerned with the economy and reliability, passenger comfort and attention of public concern, environmental protection has also been duly noted.
September 8, the Asian air show on the 7th stand, a large blue and white aircraft models eye-catching. This is a big eye-aircraft company was founded 16 months since the surrender of the first papers.
Large civil aircraft development from the bear the heavy responsibility of the China Commercial Aircraft Co. developed its own model plane named C919″, according to the Chinese deputy general manager of commercial flying large aircraft program chief architect WU Guang-hui of interpretation, C is Chinas the first letter as well as Chinese business flight abbreviation COMAC the first letter of the previous nine meaning everlasting taken, followed by 19 shows that the planes maximum capacity for 190.
From the 1:10 ratio produced a model of view, about 2 meters more than the fuselage precursors pass white, blue and white tail, tail to grass green and write on the eye-catching C919″.
According to the Chinese business to Shanghai Aircraft Design Institute GUO Bo-chi introduction, C919 is in the short-haul commercial passenger aircraft, the actual total length of 38 meters, wingspan of 33 meters, height of 12 meters, the basic layout for the 168 model. Standard of a range of 4075 kilometers, increasing the range of 5555 kilometers, economic life of 90000 flight hours.
The aircraft started to develop last year, plans by the end of 2014 its maiden flight in 2016 and delivered to the user to obtain a certificate of airworthiness. C919 aircrafts development objective is for the 8-10 years after the civil aviation market to provide a safe, comfortable, energy saving, environmental protection, competitive business in the short-range single-channel transport. Positioning in the market to China as a starting point, taking into account the foreign market, providing multi-level, multi-range products.
The world only the United States, Europe, 4 countries, and Russia that the total take-off weight more than 100 tons of the transport aircraft, including military, civilian large transport aircraft, including more than 150 aircraft trunk. Which occupy the international market, only the United States, Boeing and Europes Airbus. The past 20 years, Chinas large aircraft entirely dependent on foreign imports.
As Airbus and Boeing respectively, the first letter A, B, China-made large aircraft types to be known as C919″, also shows Chinas business fly with Airbus and Boeing aircraft manufacturing industry in the international large-scale formation of ABC tripod, a new pattern of ambition. The Asian air show, Chinas commercial flying booth located in Hall 7, the most among the passengers on the left is an empty booth, right next to Boeing.
The majority of lay members have an intuitive sense of C919 and Airbus A320, Boeing 737 similar appearance, but had participated in regional jet ARJ supplier management, General Manager, Guangdong Changsheng Aircraft Design Co., Zhou Ji, he still could see them different.
The biggest difference in the nose, the traditional head, as well as two from the front side windshield composed of four, while the C919 less side two windshield. Zhou Ji of Health to the Business Weekly said that the Chinese-made large aircraft The nose is more streamlined, can reduce the resistance, while the vision of pilots in the cockpit is also more spacious than the traditional nose. From this we can see, China-made large aircraft fuel efficiency and economy will put more stress.
According to Chen Jin, introduction, C919 does have many advantages. C919 from the nose, wings to the tail, engine, both in the design effort, and minimize resistance, effectively reduce fuel consumption.
The use of materials, C919 will be used a lot of advanced composite materials such as aluminum-lithium alloys, titanium, etc., in which the use of composite materials will reach 20%, then through the details of the internal structure of the aircraft design, the weight of the aircraft down compression.
At the same time, due to extensive use of composite materials, compared with the same type of foreign aircraft and 80 dB of cabin noise, C919 will be reduced cabin noise below 60 decibels.
Emissions reduction, C919 will be a green emissions and adapt to environmental requirements of advanced aircraft, through the environmental protection design concept is expected to aircraft carbon emissions reduced by 50% compared with the same aircraft.
Speaking of the cabin passengers are most concerned about the environment, Chen Jin said, comfort is the primary objective of C919 cabin design. Cabin seating layout will use the single-channel, three on each side, in which the middle-seat space will widen, thus effectively easing the past, take the middle seat passenger crowded feeling.
In addition, C919 aircraft will be compared with similar foreign aircraft cabin size increased, increasing the height of the luggage compartment location.
Chen Chin-view, because of Chinas purchasing costs and manufacturing costs than Boeing and Airbus companies is low, Chinese-made large aircraft will be the first aircraft, Boeing and Airbus would surely be much cheaper the same model.
Chinas domestic market is sufficient to meet Chinas demand for large aircraft sales, so we do not hurry the development of foreign markets, but sooner or later, Chinas large aircraft will enter the European and U.S. aviation market. He said.
This means that in the fast-growing Chinese aviation market, Boeing and Airbus will face more intense competition. Boeing recently released 2009 market outlook, in order to cope with challenges and competition that may arise, in particular, proposed to increase the intensity of the 737 technology upgrades to further increase fuel efficiency.
Engine go hand in hand
Despite Chinas high-profile launch of commercial flying C919 prototype, but as chief designer of the WU Guang-hui continues to be extremely low-key. In an interview with Business Weekly interview, he has always refused to evaluate the prototype, but said the large aircraft development is progressing well.
For WU Guang-hui, the more special significance are the C919 prototype model show a week before the first day.
At 9:30 on September 1, C919 aircraft nose large prototype aircraft in the Chengdu Aircraft Industry Co., Ltd. started production. WU Guang-hui introduction, head length 7.9 meters wide and 3.96 meters, 4.16 meters high, including the radar cabin, cockpit, toilet, kitchen as well as the cockpit, is expected to deliver by years end.
Cheng Fei, according to the persons concerned, at present, C919 nose engineering sample of large passenger aircraft project is on schedule to carry out the work, components will be conducted in mid-October opening riveting, is expected to deliver by the end of December this year in Shanghai, in September next year, the prototype is expected in Shanghai, external public display. In addition, from 2014 onwards, a large aircraft flying into the nose of years of manufacturing capacity will reach 10.
However, this does not mean that Chinas own big aircraft projects have made substantial progress.
In fact the production of the prototype into a flying head is just a shell. CNAC industry insider who asked not to be named, told the Business Weekly, large aircraft, the current basic program, the concept has been out, but a lot of the design of specific Details are still more than the election, we need to build up structure after the final determination, made the production of prototype flying the main purpose of the nose is used to coordinate the layout.
According to the person in charge, the current head are used in conventional materials, not composite materials, and no suppliers to participate. For the C919 model, he said, made such a model is mainly to provide public information, technical process is actually very easy.
Their business in China, the primary task of flying in front, or the choice of suppliers. The person in charge said.
Now completed its first flight of the regional jet ARJ21-700, in the engine, electronic control systems and other key components, since the domestic product is temporarily not meet the technical requirements, the localization rate is very low. The Chinese once said Zhang Qingwei, general manager of commercial flying large aircraft program to maximize the localization rate.
Indeed, many domestic companies from large aircraft, assigned to a piece of the project.
In addition to the nose section manufactured by the Chengdu Aircraft, Hongdu Aviation Industry Groups commitment to the first large aircraft fuselage, aft fuselage body structure in the manufacture, XAC has won in the fuselage (including the Central Wing), outer warily boxes (with a fixed pre post-edge), flaps, trailing edge flaps, leading edge slats, spoilers and other six work packages, Shen Fei Mi will fly with the Chinese supplier to design and cooperation, and Hafei will provide a composite body , Chang received a share of the small flying wing spoiler and other parts of the development and production tasks.
However, constrained by lack of domestic manufacturing capacity, large aircraft, a large number of manufacturing sectors still need to resort to a global package, especially the engine.
In January of this year, AVIC I Commercial Aircraft Engine Co., Ltd. formally established in Shanghai with registered capital of 60 billion yuan, the China Aviation Industry Corporation as the controlling shareholder, accounting for 40% stake in Shanghai Electric (Group) Corporation and Shanghai Guosheng (Group ) Co., Ltd. as the equity shareholders, each investor a 15% stake. Companys business include civil aircraft, engines and related products design, development, production, sales, maintenance, service, technology development and technology consulting.
This indicates that, following General Electric, Rolls Royce, and the three major aircraft engine manufacturer Pratt & Whitney, the Chinese enterprises have also begun to impact the large-scale jet engine project.
However, due to time constraints, Chinas large aircraft project at the initial stage will certainly use foreign engines. At present, the Pratt & Whitney, General Electric and Frances Snecma joint venture CFM Air Group and China, together with a large aircraft engines and related power plant supplier candidates. It is understood that this year will be finalized before the end of the final supplier.
Flying in commercial aircraft engines, said Zhang Jian, general manager, domestic-made large aircraft engine when loading commenced commercial supply, depending on customer demand. Issued by the shipping companies goal is not only providing products for the China-made large aircraft, but also a variety of aircraft for domestic and foreign manufacturers of products.
Variety on the plane, in addition to 150 aircraft, will also meet the executive jets, dual-channel 250 large aircraft, regional aircraft, civil helicopters, propeller aircraft needs. At present, shipping companies made the first developed with independent intellectual property rights 3200 kilograms thrust on the Richter scale bypass ratio turbofan engine prototype is expected to be completed by the end of this year, this can be used for a new boat engine turboprop regional aircraft and business jet family.
Orders for the C919 issue, Chen Jin appeared to be very cautious, he was Business Weekly said, C919 progress and the development of new aircraft orders for the worlds an unbreakable connection between the production volume will be in accordance with market demand, the model at the current Asian is only a preliminary prototype of an open air show, order the question premature.
