rcrmj
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more amature's talk````every line or shape of an areo plane is not a random drawing from "a designer" but backed by books and books of careful calculations```And those countries have you refer has capability to build 5th/6th gen jets alone without any help from USA because they also have research/industrial base, as for turkey their 5th gen jet will not come after 2030 @rcrmj
maybe those countries "can do" the calculations, as you only need a computer and suitable software, but the question is where do all of those original data come from?```the answer is thousands after thousands of wind tunnel tests and experiments to just collect raw data!````so this leads to the question of who has the most thorough data of various areodynamic frames? ``` and answer is Russia, U.S and China````
Here we are talking about stealth outfit, so the previous data might not be suitable for it, so you need to work on new sets of data that can deflect radar signal at meantime has to be areodynamic friendly too!````again, who has the most thorogh data of these? ```the answer is U.S and China``````
now, you tell me, you'd really suggest those countries to spend billions after billions to build various sizes of wind tunnel, and to do deceds long of ground research before to even work out a suitable stealth outfit? c'mon`````thats why I said, to amatures, to design a fighter jet is no more complicated than drawing one on board, but the reality is far from where your knowledge can reach``!
when CAC was working on J-20 at early stage, they even paid some money to Russian areo institution for double checking their calculations, I can tell you this much```````
so for those countries (leave Turkey), without U.S data support, they dont even know where to start with, not to mention more complicated issues when it comes to system integration and other bits and bots```````