sinodefenceforum.com
Translated by google
2020-10-16
After mass production of modern fighters begins, different batches of fighters will be improved more or less. For example, F16 fighters are in the production of A/B models, which are successively divided into Block1, Block5, Block10, Block15, Block15OCU (mission capability upgrade), Block15MLU (medium life upgrade), Block20, and F16 between different batches have some imperceptible improvements in appearance. For example, Block15 adds two hanging points in the air inlet and increases the area of the horizontal tail. After the J-20 fighter began mass production and service, the new batch of J-20 offline photos were also officially released. There have been two major changes in appearance.
The first change comes from the engine tail nozzle. It can be seen that the engine tail nozzle of the new J-20 is divided into two layers: inside and outside. This is a unique feature of the ejector nozzle. The nozzle of the upper layer is responsible. The passage between the outer layer and the inner layer is connected to the engine compartment, which can directly extract cold air and cool the engine. Since the state of the exiting tail nozzle hardly changes, it can keep the shape of the rear of the aircraft. In the best resistance state. AL31 is still a traditional single-layer tail nozzle, and turbofan 10 "Taihang" engine uses ejector nozzles, so it can be determined that the new batch of J-20 is equipped with Taihang engines.
In addition, the landing gear of the new batch of J-20 is obviously thicker, and an auxiliary rod has been added. It can even be seen that the tires of the rear landing gear have a certain degree of flattening deformation, which shows the take-off weight of the new batch of J-20 It has been greatly improved, even exceeding the load-bearing limit of the original landing gear, the landing gear must be strengthened. It is rare for modern fighters to re-strengthen the landing gear. The F16I "Thunderstorm" fighter ordered by Israel from the United States has strengthened the landing gear, because the F16I has greatly optimized the ground attack capability, and the maximum take-off weight is reduced by 19 of the F16C/D. The ton increased to 23 tons and a stronger landing gear had to be reinstalled. The J-20's landing gear was reinforced, indicating that the maximum take-off weight of the new batch of J-20 has increased by about 4 tons.
The increase in take-off weight of the J-20 is mainly due to the replacement of a larger thrust engine. The maximum thrust of the improved Taihang engine can reach 140 kN, while the previous AL31 engine only has a thrust of 125 kN. After the engine thrust of the new batch of J-20 is increased, more electronic equipment can be added in the body, and the J-20 may even carry heavier air-to-surface missiles. The increased engine thrust of the J-20 not only improves the mobility of the fighter, but also fully explores the upgrade potential of the J-20's huge airframe, bringing the J-20's performance to a higher level.
However, the replacement of the J-20 with a turbofan 10 engine also shows that it will not be equipped with a turbofan 15 engine in the short term. Whether it is an AL31 or a turbofan 10, it is the transitional power of the J-20. Only equipped with a turbofan 15 engine can the F-20 be considered. Truly became a "perfect body." The turbofan 15 not only has a thrust of about 160 kN, but also has vector thrust technology, which greatly improves the cruising speed and super maneuverability of the J-20. By then, the J-20 fighter will have almost no weaknesses.
No comments:
Post a Comment