Does not matter now.So, now after the Indo-Pak mini aerial war, some Israelis are accusing China "copied" or "stole" their Lavi tech or design, not "sold" to China as originally claimed by some Americans. Lol.
Is the technology of China's J-10 from Israel? The designer personally refuted the rumor, saying that it has nothing to do with it!
2020-02-10 12:40 Source: Sharp Blade Observation Eye
Recently, a group of Western military media, led by The American Interest, began to hype up the J-10 fighter jet developed independently by China. Although the People's Liberation Army claimed that it was developed by itself, it was actually achieved with the military and technical assistance of Israel. It cannot be called an independently developed aircraft. In other words, Israel's "technical fingerprints" have been stained on every inch of the J-10 fuselage. Is this true? Nonsense!
(Title: Did Israel provide assistance to the Chinese Air Force? The article believes that the J-10 technology comes from Israel)
The J-10 is a single-engine, all-weather, fourth-generation multi-purpose fighter developed by Chengfei for the People's Liberation Army Air Force. It is also the core pillar of China's modern large jet fighter fleet. There are currently about 350 to 400 in service, and its combat effectiveness is at the same level as the F-16. The development of the J-10 began in 1986, with Song Wencong as the chief designer. It successfully made its first flight on March 23, 1998 and entered service in 2005. The J-10 has the ability to conduct air superiority operations and precision strikes against sea and land, and is one of the absolute main forces of the Chinese Air Force.
But on this point, the US military media also argued, saying that the reason why the J-10 was able to be developed and put into service was largely due to a jet fighter developed by Israel in the 1980s. They also produced so-called evidence that the so-called "father that the J-10 has never seen" was Israel's Lion fighter.
(The so-called "evidence that the J-10 technology originated from the Lion fighter" shows that there is a certain similarity between the two)
The Lion fighter is a fighter developed by Israel Aerospace (IAI) since February 1980. Israel hopes to independently develop a fighter to replace the monopoly of American fighters in its air force, so the corresponding project started in 1982. However, due to the high difficulty of developing the Lion fighter, Israel finally had to introduce American technology and funds, and only in 1987 did it produce five prototypes, of which only the first and second were completed and able to fly, which can only be said to be a failed plan. After this failure, Israel finally canceled the plan and continued to buy American fighters, and the technology of the Lion fighter has been sealed since then.
(Design drawing of the J-10)
In fact, the main reason why Israel developed the Lion fighter was to reduce costs, because the American F-4 "Ghost II" and F-15 "Eagle" fighters purchased in the 1970s were too expensive. Although they had good performance, they could not withstand losses. So Israel hoped to develop a cheaper alternative, and the Lion was their solution, but it failed.
One thing we can admit is that the PL-8 missile does have some technology that comes from Israel. By drawing on Israel's Python-3 missile and combining it with the actual performance of the J-8, China's new generation PL-8 is enough to allow the J-7 and J-8 to compete with Western fighter jets that are more than one generation advanced. But if the rest still uses Israeli technology, it is not very practical and can even be called nonsense.
The Lion fighter uses a delta wing layout and a maneuverable front canard, which is indeed similar to the J-10, because the J-10 uses a close-coupled canard aerodynamic layout of a delta wing plus a delta canard. However, the design of the Chinese J-10 cannot come from the Lion fighter. The main reason is very simple. China already had a similar aerodynamic layout in the earlier J-9 plan, and the J-9 project was actually completed as early as the 1960s, much earlier than Israel's Lion plan. Therefore, time, as the "most irrefutable witness", has completely shattered the rumor that "the J-10 technology originated from the Lion fighter."
(Imaginary picture of the J-9 plan. The J-9-6-1 designed in 1970 already adopted the belly air intake and canard delta wing scheme)
In 2007, in order to counter Western accusations, J-10 chief designer Song Wencong publicly denied that the J-10 had any connection with Israel's Lion fighter. If the logic of some American media continues to be used, and the J-10 technology comes from the Lion fighter, then it is equivalent to indirectly admitting that the technology of Chinese fighter jets was aided by the United States (the Lion was largely designed by the United States), which is even more disadvantageous to China.
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China's J-10C is caught in a "plagiarism" storm? Israel publicly spreads rumors: it copied their fighter jets
Nangong Qin 2025-06-25 19:18 Zhejiang
"China's J-10 is a copy of our Lion fighter!"
The Israeli media made this accusation, which instantly ignited heated discussion on the Internet.
What is the truth? What is the connection between the J-10 and the Lion?
View attachment 133882
The duck wing dispute: Who is copying whom?
Israel insisted that the canard design of China's J-10 was stolen from their "Lion" fighter, attempting to discredit China's aviation achievements as "plagiarism."
But when you compare the two planes, the difference is huge.
The J-10 uses a medium-range coupled canard, which is separated from the main wing by a certain distance. It flies fast and steadily, and is particularly suitable for supersonic pursuit.
The main wing is a large triangle, plus the DSI air intake - this is a high-tech gadget that can hide radar signals and make the aircraft lighter. The result? The J-10 can soar to Mach 2.2 and climb at a speed of over 300 meters per second, making it a real "Flash" in the sky.
View attachment 133883
Let's take a look at the "Lion" type, with close-coupled canards, which are close to the main wing, like a low-altitude bombing expert. The main wing is a swept wing, and the air inlet is still an old antique pitot tube, and the technology is outdated.
Its fastest speed is only Mach 1.85, and it can climb 254 meters per second. Compared with the J-10, it is simply a "turtle crawling".
Of these two, one is a sports car and the other looks like a tractor. Who would believe you if you insist that they are plagiarism?
As for the design concept, the J-10 is an air combat ace that pursues speed and flexibility; the "Lion" is more of a generalist that is good at low-altitude ground attacks.
View attachment 133884
The J-10's DSI air inlet is a unique feature that relies on airflow control to reduce weight and achieve stealth. The Lion, however, still clings to the old-fashioned Pitot tube, and its technology is far behind.
The J-10 also has wing-body fusion technology, which makes the fuselage slippery like a fish and fly faster; the fuselage and wings of the "Lion" are clearly separated, which is much less efficient. In terms of canard details, the J-10 has added an upward dihedral, which makes it as stable as a dog at high speeds, while the "Lion" prefers the trick of rolling at low speeds.
Just looking at these, isn't it clear who copied whom?
View attachment 133885
The gap between technology generations
The technological gap between the J-10 and the Lion is like that between a smartphone and a flip phone. How can it be called plagiarism?
The J-10 is China's first fighter jet to use a fully digital fly-by-wire system. With real-time computer adjustments, it can fly fast and steadily, and can easily perform even difficult maneuvers.
What about the Lion? It uses an analog fly-by-wire system, an outdated technology with a stability of only 10% to 12%. It often breaks down during test flights, and it feels like riding a roller coaster when flying.
In terms of power, the J-10 is equipped with Russian AL-31FN or domestic WS-10B engines, with thrust of 123 to 140 kN. Empty weight is 8,000 kg, combat weight is 12,000 kg, thrust-to-weight ratio is over 1.0, and acceleration is as fast as a rocket. The "Lion" uses Pratt & Whitney PW1120, with thrust of only 91.5 kN, empty weight is 7,031 kg, combat weight is 10,531 kg, thrust-to-weight ratio is 0.89, and it flies as slow as a snail.
View attachment 133886
One is a turbocharged sports car and the other is an old diesel engine. It is obvious which one is stronger.
The J-10’s digital system can also handle complex flight control, and supersonic cruise and low-speed hovering are very stable. The Lion’s analog system is slow to respond, and its maneuverability seems to be hampered at high angles of attack.
In the cockpit, the J-10 has three large LCD screens plus a holographic display, and information can be understood in one second; the "Lion" still has the old instrument panel, and the operation is as difficult as solving a puzzle game.
With such a huge gap in technology, the J-10 is obviously a product of the new era, while the Lion looks like a relic of the last century. Still accusing them of plagiarism? The timeline may be more telling.
View attachment 133887
Which timeline comes first?
Speaking of R&D history, the J-10 can be traced back to the J-9 project in the 1970s. Although the J-9 did not fly, it accumulated valuable experience in canard design and wind tunnel testing.
The J-10 was officially put into production in 1986, made its first flight in 1998, and was delivered to the troops in 2003. What about the Lion? It was started in 1980, made its first flight in December 1986, and died in 1987 due to lack of funds and pressure from the United States.
If you calculate the time, the foundation of the J-10 is ten years earlier than that of the Lion, so how could it be plagiarized?
What’s even more interesting is that in 1999 Israel developed an improved version of the “Lion”, replacing the swept wing with a delta wing and moving the canard forward, making it look like twins with the J-10 that first flew in 1998.
Isn't it obvious that the "Lion" is trying to take advantage of the popularity of the J-10?
The wind tunnel data of the J-9 was directly fed to the J-10, while the development of the Lion was entirely backed by the United States, and its engine is a rebadged version of the F100. Song Wencong, the chief designer of the J-10, has long been confident that the J-10 is the authentic descendant of the J-9 and has nothing to do with the Lion.
In 2012, Air Force Major General Zhang Weigang also publicly refuted the rumors and denied any connection with the "Lion".
The timeline is so clear, why is Israel still holding on to it? There must be something fishy behind it.
Israel's Anxiety
After the "Lion" project failed, Israel completely bid farewell to its own fighter jet manufacturing and could only rely on the US F-16I to survive, and its aviation industry has been in a slump.
In contrast, the J-10 brought the Chinese Air Force to a new height as soon as it came out, and broke the Western technological monopoly.
In 2025, it was rumored that Pakistan's J-10CE defeated India's Rafale. Israel couldn't sit still and quickly used the "Lion" to make an issue of it in an attempt to discredit China.
But the reality is very bleak. After the Taiwan Strait crisis in 1996, the United States imposed a strict blockade on China's technology, not to mention Israel, and even a needle could not be passed. After 1989, the United States issued a death order to ban weapons and technology. China wants to touch the "Lion"? Don't even think about it.
The J-10 relies entirely on its own technology and Russian engines, and has nothing to do with Israel.
Israel's actions are clearly motivated by jealousy. The J-10 not only makes the Chinese Air Force more powerful, but also has a strong presence in the international market, competing with the West for jobs.
Similar things happened. In 2024, the United States still said that the J-35 copied the F-35. This is pure nonsense.
This accusation is nothing more than sour grapes about China's rise and has no real evidence.
Conclusion
From technological differences to R&D time, to geopolitical background, the J-10 and the Lion are simply not on the same path, and the claim of plagiarism is untenable.
The J-10 is the pride of China's aviation industry, and it has carved out a new path
through independent innovation.
Israel's accusations are nothing more than the product of jealousy and political calculations, and there is no truth to them.
百度安全验证
baijiahao.baidu.com
As long as j10C flys and shoots down rafale.
Pakistan was accused of bomb theft.
What does it matter? It acts like a bomb, that matters.
Point about j10c was it took its time to mature, which is natural, and it proved it's worth along with the network centric war domain.
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