>>63941388
Some things were just impossible due to resources, even if they had been able to keep Americans away from convoys and overseas refiniries for longer.

Training pilots on ground and with 200hp paper plane only gets them so far. They need brand new plane types to train into, fuel for at least few dozen hours, spare parts and maintenance crews. No amount of theory could save them.

Industrial capacity, quality alloys and amount of qualified engineers were also limits they couldn't have overcome.