What is the largest jet engine ever made?
Until its derivative, the ge9x, was passed, the ge90 series held the title of the largest engines in aviation history. The fan diameter of the original series being 123 in (310 cm), and the largest variant ge90-115b has a fan diameter of 128 in (330 cm). ge9x engine. The ge9x is the largest and most powerful commercial aircraft engine ever built, incorporating advanced technologies that enable more efficient, quieter flight with fewer emissions.