They lost the plans. For this particular engine type. That's not the same as losing fundamental knowledge of how the engines work, or the ability to recreate on

They lost the plans. For this particular engine type. That's not the same as losing fundamental knowledge of how the engines work, or the ability to recreate one larger. And you have not acknowledged you misrepresented what the article said. What is it with you types that have to feel we're failing, going backwards? I had an argument once with a guy that insisted there were compiler optimisation that aren't used any more because they are now lost - there are literally books on those opts, web articles accessible in a few clicks, probably youtube vids (in fact, see godbolt's stuff) - why are you types so set on failure and ignorance? What exactly are you thinking when you post this inaccurate and negative stuff? Aren't there enough problems in the world without making up nonexistent ones?