:lol:
F-22 Hypoxia debacle, F-35. -Lockheed are laughing all the way to the bank.
I think in 1950's USSR aircraft performance was very much the designers problem, lest they get taken out back and shot.
Heck Sukhoi went back to the drawing board when it was discovered that the Su-27 wouldn't perform as promised, this despite series production already being underway.