Military of China, force comment.
Military of China, force comment.

F-20 photos out it! The most valuable is behind the photo, you can partially see inside the engine, vaguely AL31 series. Jars, also the engine debate, some say must use the Taihang, and some say now is the AL-31F 117S, in the future, what a mess view has.

new photos once again proved the correctness of my point of view, I reiterate. The first flight is supposed is absolutely reliable, the Taihang engine, and there was not sufficient capacity experiments, out of a lot of problems in the F-11B trial, it is not possible for F-20 pre-flight test. Gust test flight of the F-404, the F-22 flight test with the F100. The new aircraft with a mature old engine test flight is international practice.
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engine diameter of the inlet diameter and the external body diameter is an important criterion, can not be altered, the flight test engine diameter must be the same diameter and batch production engine, this parameter must The GJB determined. So must be the engine to adapt the aircraft to accommodate the engine rather than the aircraft. The final conclusion is – the flight test engine is narrowing the external dimensions of the AL-31F – AL31FN

This is specifically for the Chinese improved in order to adapt the national military standard, reducing the engine diameter. In addition, the new engine has not been test can not be proved to be completely reliable. So, I guess the F-20 flight test engines after a period of time half of the new AL-31FN As for the vents, the modification is very simple. That white nozzle vectoring nozzle should be supporting and F-20. Late estimated that there will be improvement.

As for the introduction of AL-31 or 117S technology, the answer is simply impossible. AL31 is four fan 11 compressor layout, the extremely backward (Taihang and the United States F110, F100, like, nine three fan compressor, the F119 is a three fan compressor 6).

blade is face-to-face interviews of the late 1960s to overcome the technology (see CCTV division Chang Xu) air-cooled casting blade material is a high-temperature nickel-base alloy (United States began in the late 1970s single crystal blades, Taihang is also used in single crystal blades, but technically and the United States is far worse). 1990s is qualified imitation AL31 do not care to go generic, Taihang much more advanced than AL31, the difference is technology maturity. As for the 117S, although the the AL31 improvement from, but also a new engine, the same immature. Such as 117S mature Taihang also have long use.

now the engine a little clue it. The initial test flight using the AL-31FN wait until the flight test of supersonic cruise estimates on the domestic engine.

new F-20 photo out! The most valuable is behind the photo, you can partially see inside the engine, vaguely AL31 series. Jars, also the engine debate, some say must use the Taihang, and some say now is the AL-31F 117S, in the future, what a mess view has.

new photos once again proved the correctness of my point of view, I reiterate. The first flight is supposed is absolutely reliable, the Taihang engine, and there was not sufficient capacity experiments, out of a lot of problems in the F-11B trial, it is not possible for F-20 pre-flight test. Gust test flight of the F-404, the F-22 flight test with the F100. The new aircraft with a mature old engine test flight is international practice.

new photos also convey a very important message, is now the J-20 magazine. This proves that no major changes in China’s aircraft development process. China’s aircraft development stage of the demonstrator. Validation machine is assembled from the existing aircraft parts made mainly on the aerodynamic layout validation and feasibility of project risk assessment, at the same time responsible for the selection task. F22 demonstrator corresponding 1990 first flight.

demonstrator selection after the detailed design. The demonstrator aircraft development process this piece. The demonstration part of feasibility studies and project risk assessment on the program, aerodynamic flight test on the prototype test flight. So close to the 1997 test flight of the F22 prototype now test flight of the F-20 technology state, the internal structure of the basic set, there will be no major changes, design stereotypes will not spend too long.

aircraft selection is to rely on the demonstration program, the United States by the demonstrator. Although the United States more expensive, but the taste of the Chinese way somehow on paper, is not reliable. So in the future may be closer to the United States.

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