2. The main technical level and operational effectiveness of each generation of fighters should be gradually improved. In other words, the next generation fighter is "a step higher" than the previous generation fighter. Instead of "upgrading" as long as the technical level is improved and the technical characteristics are different.
3. "Substitute aircraft" must be the main type of aircraft in a period. Must have a certain amount of equipment and be tested in actual combat. Some research aircraft cannot be regarded as substitute aircraft.
A generation of domestic fighters;
The maximum speed of the first generation aircraft is m0.9-1.3; Loading artillery, rockets and first-generation air-to-air missiles; The aircraft is also equipped with an optical electromechanical sight and a first-generation radar.
The second-generation aircraft has a maximum speed of M2-2.5 and is equipped with second-generation air-to-air missiles and machine guns. It is also equipped with a second-generation radar and a fire control system with certain interception capability.
Compared with the second generation, the third generation has little maximum speed advantage, but it has added medium-range and close-range fighting missiles and rapid-fire guns; It is also equipped with the third generation radar, omni-directional, all-altitude, all-weather fire control system and avionics system. Mobility has also been greatly improved.
The fourth generation machine has "4S" standard: stealth, super cruise; Combat awareness and effectiveness of super mobility and super avionics.
The fifth generation machine is a stealth drone. Compared with the fourth-generation aircraft, the fifth-generation aircraft has a good balance between stealth and maneuverability at various altitudes and postures through full wing-body fusion and large lift-drag ratio design. If the fourth generation computer is based on information system, then the fifth generation computer is based on the Internet of Things. The real integration of land, sea, air, sky, electricity and network has been realized, and the interconnection based on the Internet of Things has been realized.
Extended data
At present, there is no standard organization or academic unit in the world to define how to divide fighter algebra. The division of fighter algebra is mainly based on the needs of army planning. In the early days, when planes were weapons, the armies of various countries often bought them in the form of "small quantity and many varieties": one bought a little, and the other bought a little, and there was no clear distinction between models.
However, during World War II, countries realized the importance of aircraft, began to analyze the demand, and chose the appropriate manufacturer's design scheme for mass production and deployment, which not only brought into play the benefits of economies of scale, but also made logistics management and personnel training and mobilization simpler and simpler. So we can see that only one or two types of aircraft are produced at the same time to replace the previous models, and there is a generation difference in fighters.
American jet fighters, for example, started with the secret P-80 developed by Lockheed during World War II. However, after the war, the United States obtained the design data of axial flow jet engine and swept wing from Germany, and began to develop more advanced F-86 swept wing fighter.
However, fearing that the avant-garde swept wing is too risky, the US Air Force also approved the mass production of the straight wing F-84. In other words, the first generation fighters of the US Air Force after the war actually mixed two technologies.
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