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In the Cold War, China, the United States and the Soviet Union had a variety of fighters that were very similar, simply twin brothers, some of which were plagiarized and borrowed, and some of which were similar. Besides, how can the aviation industry be called plagiarism, at most convergent evolution (here the dog's head), so let's take a look at these twins who belong to two camps.
Soviet Tu-160 and American B-1B strategic bombers
The two bombers were the most similar pair, except for a pair of winglets at the nose of the B-1B that were almost identical. The most coincidental thing is that there is no one who plagiarizes whom, because the development time of the two is not more than a few years, unless the other party shares the drawings at the first time, of course, this is impossible. The Tu-160 is larger and heavier, more bomb-carrying, faster and longer-range than the B-1B. The B-1B used limited stealth technology, the Tu-160 was mainly used for nuclear bombing at that time, and the B-1B was often nuclear. These are the differences between this pair.
The Tu-160 and B-1B are almost identical
Soviet Su-24 and American F-111A fighter-bombers
The two fighter-bombers are also highly similar, both are variable swept-back wings, both are 2 pilots side by side in the cockpit, both are twin engines, etc., which are highly similar fighters. The biggest difference in appearance is the intake tract, with the Su-24 having a rectangular inlet and positioned in the front, and the F-111 having a quarter-circular inlet and located behind. The Su-24 did copy the F-111, capturing a complete F-111 during the Vietnam War, mapping the bombing computer and variable swept-back wing system on the F-111, and applying it to the Su-24. So it's not surprising that the Su-24 is like the F-111.
Su-24 fighter-bomber
F-111 fighter-bomber
Soviet MiG-25 interceptors and American F-15 fighters
This pair doesn't look so similar at first glance, but there are many similarities on closer inspection. For example, both are twin engines and double tails, both side air intakes, and the intake tracts are wedge-shaped. The difference is that the cockpit of the two is different, the overall shape of the MiG-25 looks rough at more right angles, and the overall shape of the F-15 looks more streamlined. This time, the American F-15 copied the aerodynamic layout of the MiG-25, because the F-15 was designed at the beginning to deal with the MiG-25, and the same aerodynamic layout was for high-speed flight capabilities, and the F-15 was the fastest fighter ever flown by the United States, the original pure air combat fighter.
MiG-25 interceptor
F-15 fighter
Soviet Mi-24 and American AH-1 helicopter gunships
The two helicopter gunships don't look much like each other, but they are similar in design concept, and they are very coincidental and interesting. Both the Mi-24 and AH-1 are the first dedicated helicopter gunships in both countries and the earliest in the world. Designers from both countries have invariably chosen to develop on the basis of the mature utility helicopter, the Mi-24 applies a large number of mature technology of the Mi-8 utility helicopter, and the AH-1 was born from the UH-1 utility helicopter. Before that, there were no special gunships in various countries in the world, and the development of helicopter gunships from universal helicopters was a practical approach, which could reduce design risks, and it can be said that the designers of the two countries were sharp-minded, and the two armed helicopters had fought each other during the Iran-Iraq War.
Mi-24 helicopter gunship
AH-1 gunship
Many of today's weapons and equipment and weapon design concepts were developed during the Cold War, and many weapons were led by the United States and the Soviet Union, so it is not surprising that they borrow from each other or are coincidental by the stroke of God.