Comments by "ke6gwf - Ben Blackburn" (@ke6gwf) on "WHY Russian Aviation is CORNERED!" video.

@norfolkngood8960 radioactive materials can be uniquely identified through the ratio between different isotopes which is unique for each reactor, but it also requires having a sample to compare to. Something like a bolt might be able to be identified if another bolt produced in the same batch or furnace is compared, but you can't identify if a bolt is made is Russia or somewhere else without a known reference. However, you CAN test a bolt and see if it DIDN'T come from the certified factory. In other words, you can identify metal that is different from how it's supposed to be, you just can't tell where it came from in the blind.
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@jarkkohaimakainen2378 that's exactly the issue, translating the F1 designs and processes into modern manufacturing and technology would involve a ridiculous amount of work and money. All the F1s ever built were hand built by the guys who designed them and figured out how to build them, or people they had directly trained. So while the dimensions and chemistry of a combustion chamber might be in the records, the exact heat treating process, how it was stacked in the furnace, and exactly what the specs of the furnace were used, how it was cooled down to prevent warping, and then how it was hand lapped and adjusted to get it to fit and work perfectly, was only known by the craftsman actually doing it. And when they considered restarting the program, most of the original workers were dead or no longer remembered the details, and a lot of the engineer and technician notes had been lost or taken home by the workers. The machines and tools they used and the technology and techniques that they used back then are also no longer in use and not well understood anymore, kind of like very few people know how to black Smith anymore. So it would require figuring out how to build old designs with modern technology, which would also mean redesigning a lot of parts to make them compatible with CNC and other modern technology and materials science And at the end of the day, they realized that they would basically be starting from scratch, because they would have to start building and testing parts until they figured out how to get the required performance, and so they realized that it would be easier to design a new engine using modern technology from the start, rather than try to restart the F1 production. And that's the same issue Russia would run into if they try to reverse engineer anything, because if they don't have the materials science and exact tools and methods used, they won't be able to produce the exact copy without extensive R&D to develop their own skills and technology.
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