Yun -7 is a twin-engine turboprop short-range transport aircraft developed and produced by China on the basis of the An -24 model of the former Soviet Union. Yun -7 is a twin-engine turboprop regional aircraft developed by Xi 'an Aircraft Industry Company and produced by Yun Sheng -7. 1970 made its first flight to the sky on February 25th. 1in April, 1966, Xifei Company officially launched the task of reverse imitation of An -24 introduced and developed in the 1970s. After the first flight of the first prototype, the aircraft design finalization appraisal was organized twice in 1977 and 1979. 1980, Yun -7 completed the demonstration, design, production and flight test of the modified high-power turboprop 5A- 1 engine. The power of the new engine has been increased from 2550 horsepower to 2900 horsepower, and the structure and performance of the new engine block have been significantly improved. 1On July 24th, 982, Yun -7 aircraft was designed and finalized by the Military Products Standardization Committee and put into small batch production. Prior to this, a single take-off and landing test was successfully conducted. 1982 On July 30th, the state officially approved the design of Yun -7 aircraft. 1984 65438+1On October 23rd, the Civil Aviation Administration of China officially issued the airworthiness certificate for Yun -7 aircraft. Yun -7 aircraft-maiden voyage 1986 In April, Yun -7 maiden voyage ceremony was held in Hefei, and it was officially delivered to the Civil Aviation Administration of China on 1 May, 9861,and it was officially put into flight operation, breaking the unified situation of foreign aircraft monopolizing China's civil aviation passenger transport. 1985 12 1 day, heads of relevant ministries and commissions from Li Peng, Yao Yilin and the State Council boarded Yun -7- 100 aircraft at the Capital Airport, and made speeches on the development of domestic civil aircraft, localization of spare parts, and safeguard policies. Wan Li has instructed that "similar aircraft shall not be imported in the future". But in fact, because Yun -7 didn't really form a batch scale until the mid-1980s, it has already fallen behind the international level, and noise and comfort are very problematic. Neither civil aviation nor passengers like Yun -7. By the end of 1992, 785 planes of various types have been delivered. Yun -7 aircraft-performance data captain 24.3 1 Mi Yun -7 aircraft height 8.89 1 meter wingspan 29.2m maximum takeoff weight 24,000kg maximum commercial load 5,500kg cruising speed 8500m full range per hour 614km (5t) full fuel range190kg. Two WJ-5A- 1 pilots, and three According to Zhao Yuhua, general manager of China Eastern Airlines Wuhan Co., Ltd., the "Yun Qi"-100 aircraft was designed and produced by Xi 'an Airport with reference to the "An -24" aircraft of the Soviet Union. It uses a propeller engine and carries about 60 passengers. It is a short-haul passenger plane and the first generation passenger plane developed by China. This aircraft was put into use in 1984, ending the history of exclusive use of foreign civil aviation aircraft in China's civil aviation field. At present, this type of aircraft has completely withdrawn from the civil aviation field in China. A "Yun Qi"-100 aircraft donated by China Eastern Airlines was put into use in 1990, and more than ten feeder routes from Wuhan to Huangshan, Enshi, Nanjing, Changsha and Guilin were carried out. Retired in 2002, accumulated flying hours14,000 hours, and safe take-off and landing12,000 sorties, which embodies the dedication of China civil aviation people to hard work and unity, and witnessed the magnificent history of the rapid development of China aviation. Mr. Bao Peide, Chairman of China Civil Aviation Science Foundation, said at today's donation ceremony that China's civil aviation technology has entered a fast lane of development and its facilities and equipment have been updated frequently. The Civil Aviation Museum under construction will focus on the collection and display of these historical relics and historical materials, reflecting the historical leap of civil aviation in China correctly and completely. The "Yun Qi"-100 aircraft donated by China Eastern Airlines is an important witness to the development of domestic civil aviation and has a high collection value. The Yun -7 passenger planes of civil aviation companies have all withdrawn from the market. At present, Yun -7 series is still serving some civil transportation companies and the military.