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Re:Building China's Comac C919 airplane involved a lot of ha... by baybal2 on Monday October 14, 2019 @08:20PM (#21254319)
I can remember a horror story of Chinese copy of R179 engine https://news.ycombinator.com/item?id=17677936

Repost:

> Funny thing to mention, I think 95% of industrial espionage effort yields zero if not negative benefit. The problem is that you are always stealing a "cat in a bag" For machinery, rarely there is anything like a "secret sauce:" Soon after the fall of USSR, Chinese defence companies flocked to Russia buying every defence tech possible. Russian companies had a funny way to troll Chicoms: they will not sell them a simple, mid-tier equipment, but only the top notch, and most complicated one, with which even they themselves had problem dealing.

> For example, Soyuz transferred tech for their super expensive, small volume manufactured R179 engine. Yes, that was Soviet response to F135 class engines. The showstopper was its very high temperature turbine made with monocrystaline blades grown in situ within (!) a ceramic fibre reinforcing mesh.

> Even with all blueprints, tooling, documentation of manufacturing processes, and working samples on their hands, Chinese only made like 10 working engines. That state program to copy R179 continues to this day as I know.

> And I think they spent way more money on it in 25 years, than if they were to create a thing from scratch. That is something obvious to every experienced engineer, but not to bureaucrats from Chinese three letter agencies who are convinced that they are just an inch away from some "secret trick" that will magically make everything work.

My main point is that such big, state bureaucracy driven initiatives to make a Chinese analogue of some expensive widget often end up spending many times more resources that developing it from scratch in China with Chinese engineers, and often end up with inferior final product, than if it was an own original development.

Re:Building China's Comac C919 airplane involved a lot of ha... by smilekzs on Monday October 14, 2019 @08:43PM (#21254459)
While I have no specific knowledge on even jet engines, from general engineering principles, who says you cannot have 2 groups of people, one working on your own design, the other working on reverse-engineering / replicating others' works? For critical projects like this, it's not hard to imagine a State Actor throwing at least this much resources (including human resources of course) at this. One benefit I can think of is that reverse engineering can shine light on some tough problems during the "forward engineering", like "can this be done at all", and "what is the major concern / bottleneck when designing a particular component". Even if you don't figure out the whole thing, the process can still be useful, especially when you don't already have all the know-how.
Re:Building China's Comac C919 airplane involved a lot of ha... by choonway on Monday October 14, 2019 @09:03PM (#21254593)
The first thing that you learn when you go into the aviation industry, is that the shortcut is the longest way to get from A to B.
Re:Building China's Comac C919 airplane involved a lot of ha... by luba02 on Monday October 14, 2019 @09:15PM (#21254666)
stealing jet engine/materials science data and software data are different kettle of fish.

different kinds of bottlenecks. I’m assuming one set is more easily transferrable than the other.

Re:Building China's Comac C919 airplane involved a lot of ha... by choonway on Monday October 14, 2019 @09:31PM (#21254757)
For material science, replication is an issue because of differences in machines etc. Very little standardization.

It's like back in those days where HP/SGI/IBM had their own version of 'C' compilers and it was a nightmare to port from one platform to another. Especially when they used non standard behavior (e.g. dereferencing null returns 0) and use it as part of their core logic.

You REALLY need to know your stuff to make things work. Source code alone isn't enough.

Re:Building China's Comac C919 airplane involved a lot of ha... by blunte on Monday October 14, 2019 @10:33PM (#21255082)
This applies to many software projects as well :).