Judging from the flight pictures of the J-35 stealth fighter painted with air force livery and naval aviation livery on the Internet, the problem of black smoke coming out of the tail of the J-35 originally painted in black or gray has been solved.
In the previous Zhuhai Air Show, the FC-31, which was mainly used by AVIC Shenfei Company to focus on foreign trade, emitted black smoke from the tail nozzle of the fuselage during the flight, which made the "Eagle Eagle" criticized by domestic netizens and foreign military websites.
According to open source information, the 1.0 version of the prototype of the FC-31 built by Shenfei Company uses a thrust-to-weight ratio of 6.8, generally known as a thrust-to-weight ratio of 7, and a maximum thrust of 8.3 tons, generally known as 8.5 tons, which was originally used in the MiG-29 fighter against the Russian-made RD-93 turbofan aero engine.
Version 2.0 of the FC-31, that is, the yellow-skinned prototype, uses the WC-13 medium-thrust turbofan aero engine designed and produced by Guizhou Aviation Group, with a thrust-to-weight ratio of 7.8, generally weighed thrust-to-weight ratio of 8, and a maximum thrust of 8.8 tons, commonly known as 9 tons.
Version 3.0 of the FC-31 was originally painted with a green prototype and then painted into a sea-based version of the J-35 painted in gray-blue for naval aviation, and later derived from a land-based version of the J-35 painted with an air force livery.
Including the foreign trade version of the "Falcon Eagle", Pakistan called the J-31; according to this, the three fifth-generation stealth fighters developed by Shen Fei have been officially formed, and from the program disclosed by CCTV, netizens can see that Shen Fei has entered the stage of mass production.
The self-use version is called the J-35 and the foreign trade type FC-31, but Pakistan has officially named it the fifth-generation stealth fighter J-31 when it did not purchase equipment.
In the end, version 3.0 of the FC-31, the WS-19 turbofan aero engine was chosen, with a thrust-to-weight ratio of 10 and a maximum thrust of 12 tons. From the analysis of data alone, the performance of the WS-19 engine of the 3.0 version of the "Falcon" prototype has far exceeded the original 1.0 version of the Russian-made RD-93 and the 2.0 version of the domestic WS-13.
At the 10th China Aviation Technology Promotion Forum, an authoritative domestic aviation research and development expert made it clear in a speech at the conference and in an interview with reporters that the mainland's WS-19 aero engine has begun mass production.
It is reported that WS-19 belongs to the fourth generation of thrust engine, which is the third in the world after the United States and Britain to have independently developed and adopted an advanced digital engine control system with super thrust.
WS-19 has excellent fuel economy and high reliability, and its thrust ratio exceeds 10, which makes the 3.0 version of the "Falcon" basically eliminate the phenomenon of black smoke spraying from the tail in flight, and meet the stealth performance and over-patrol requirements of this stealth fighter.
It shows that the mainland has mastered the technology of double-channel centrifugal nozzle and two-stage vortex, and the atomization quality of fuel is good, which avoids the problem of accumulation and carbon accumulation of a large number of carbon atoms in the nozzle, basically realizes smokeless combustion in the fuel room, and solves the phenomenon that the smoke concentration of the "Eagle Eagle" increases and thick black smoke comes out of the tail.
The 3.0 version of the "Falcon Eagle" not only solves the problem of black smoke sprayed from the tail, but also has the technical bonus of the WS-19 engine, which improves the maneuverability of the fighter during flight, and meets the maximum flight speed of Mach 2.2 of the 3.0 version of the "Falcon Eagle", with a combat radius of 1350 kilometers and a maximum bomb load of 7.8 tons.
Now, it is also reported on the oil pipe that the FC-31 equipped with the WS-19 fourth-generation medium-thrust engine in the 601 test, the thrust of the twin-engine "Falcon Eagle" reaches or even exceeds 24 tons, which can meet the equipment needs of the Pakistan Air Force as a land-based fifth-generation stealth fighter.
According to the news published by the Pakistani military media "Pakistan Defense Open Source Intelligence", the Chinese J-31 stealth fighter that Pakistan will buy will be replaced with China's latest WS-19 medium-thrust engine.
After the replacement of the engine, the J-31 will have a significant improvement in performance, surpassing the 16 tons of the previous WS-13 engine. Let the J-31 achieve supersonic cruise, fully meeting all the standards of the fifth-generation stealth fighter.
Recently, the Internet about the Pakistan Air Force will purchase equipment with Chinese-made J-31 stealth fighters, has long been rumored, referring to the Pakistan Air Force's latest propaganda video, by 2030 will build a combat system with both offensive and defensive capabilities and air defense and anti-missile capabilities.
In the video, it is rare to see the FC-31 "Falcon" Pakistan called J-31 that has not officially purchased equipment, and the FC-1 "Thunder" of the Pakistani Air Force is called JF-17 Block3 "Thunderbolt" and J-10CE "Raptor" as the main fighter "Three Musketeers" in the air, and the Pakistani military will be equipped with J-31 It may not be groundless.
The chief of staff of the Pakistan Air Force, Admiral Zahir Ahmad Baber Sidu, also made it clear that he would purchase and equip the Chinese-made stealth fighter J-31. On January 1, 2024, during an inspection of an air force operating base, he said that the J-31 stealth fighter developed by China will become part of the Pakistan Air Force fleet in the near future.
The J-31, with only the fuel in the aircraft, will have a combat radius of 1350 km, and the Pakistani media say that the combat radius is 1250 km. When carrying out air supremacy operations, the belly concealed bomb bay can carry four "Thunderbolt"-15E long-range air-to-air missiles with a maximum range of more than 200 kilometers and two "Thunderbolt"-10E close-range combat air-to-air missiles.
When implementing a ground/sea attack state, the J-31 can be equipped with two auxiliary fuel tanks, and at the same time carry CM-400AKG supersonic anti-ship missiles, FT and LS precision-guided bombs, etc., which can directly threaten the deep hinterland of its competitor India, and even include the capital New Delhi and other areas in the attack range of the J-31.
The J-31 stealth fighter is the absolute main force, and the JF-17 Block3 "Thunderbolt" fighter, the J-10CE "Raptor" fighter and the Pterodactyl "-2 UAV" and ZDK-03 early warning aircraft will become the air blade of the Pakistani Air Force to carry out territorial air defense and foreign strikes.