@CaffeineAddict,
His story was that the other company was milling the blades to too great an accuracy and were accidentally removing all the cooling air vortexes across the blade edge.
Dunno about that particular story, but engineering is full of subtlety like that.
The Germans failed to replicate British built magnetrons in WW2. They'd put slight variations in the length of the internal vanes they'd measured on captured devices down to sloppy British engineering. All the ones they made had the vanes the same length. Turns out that was a mistake, and they were unable to effectively jam H2S radar on bombers. Oops.
Biting the hand that feeds IT
