Yunyun-20b aerial refueling tanker unveiled in the future may be developed into the world’s largest aerial refueling tanker
The recent appearance of the Yun-20B aerial tanker shows that the large transport aircraft yun-20B and the large air tanker yun-20B may develop simultaneously.The successful development of the Oil-20B will further enhance the air refueling capability of the Air Force and provide more powerful support for the strategic transformation of the Air Force.Compared with the oil-tanker 20A, the oil-tanker 20B is equipped with a ws-20 large bypass turbofan engine, which increases engine thrust and maximum takeoff, making it possible to develop today’s largest aerial tanker in the future.According to relevant data, the TAKE-OFF thrust of the WS-20 engine is close to 16 tons, so the total take-off thrust of the oil-carrying large aerial refueling tanker is about 65 tons.The thrust-to-weight ratio of modern large aerial refueling tankers is generally 0.25-0.26. According to this standard, the maximum takeoff weight of oil-20B can be estimated between 250 tons and 260 tons.That is the third largest tanker in the world, with the Iranian Air Force’s KC-747 having a maximum takeoff weight of more than 300 tons, followed by the U.S. Air Force’s KC-10 with a maximum takeoff weight of 267 tons.But both tankers are older, more than 30 years old, and are expected to be phased out after 2030.The weight of the new generation of foreign air tankers is basically within 230 tons, such as the European A330MRTT air tankers with a maximum takeoff weight of 230 tons, The Russian Il-78M air tankers for 210 tons, the United States KC-46A is smaller, only 190 tons.Ah 30MRTT almost become the new generation of standard western air tanker KC-46A maximum take-off weight is less than A330MRTT, therefore the multi-purpose performance is lower than the latter for the air tanker, maximum take-off weight is a very important indicator.The larger the maximum takeoff weight, the more payload it can carry, the more fuel it can provide to combat aircraft, and thus the better to extend the range and operational radius of these aircraft.As is known to all, A330MRTT is preferred by foreign users in the competition of the new generation of air refueling tankers. The main reason is that A330MRTT has a larger maximum takeoff weight and a wider range of uses.Even the US Air Force may now choose the tanker as its next generation aerial tanker.With a maximum takeoff weight of 250 tons, the oil-transporting 20B has a structural weight of about 100 tons, giving it a payload of 150 tons.According to the Il-78M aerial tanker, it has an operational dead weight of 100 tons and a maximum payload of 110 tons based on a maximum takeoff weight of 210 tons.The wing tanks hold 90 tons of fuel and the cargo hold can hold another 20 tons of fuel.The Il-78M tanker is capable of providing 65 tons of jet fuel to combat aircraft with a mission radius of 1,000 kilometers.It is believed that yunyou20B aerial refueling tanker has a better structure design, more advanced materials and technology, so the use of empty weight should be similar to the Il-78M, the maximum takeoff weight of 260 tons, the load has reached 140 tons, wing fuel tank for 100 tons, cargo hold can also load 30-50 tons of fuel.Because of its aerodynamic design and superior engine to the Il-78M, the Oil-transporting 20B can provide more than 70 tons of fuel to other aircraft with a mission radius of 1,000 kilometers.The performance of oil-transporting 20A is limited by the engine. It should be pointed out that the take-off thrust of WS-20 turbofan engine can be further improved to about 18 tons.With the new engine, the maximum take-off weight of the Yunyu20B can be further increased to 280 tons.This has surpassed the KC-10 and is second only to the KC-747.However, the KC-747 was put into use before 1979 and has been in service for more than 40 years. Considering the service life of the body and its components, it is not likely to be in service after 2030. Therefore, yunyu20B is likely to become the world’s largest aerial tanker in the future.