Discussion
Increasing bypass ratio makes propulsion integration harder chiefly because
Answer: C
Correct answer: Ground clearance becomes critical
A higher bypass ratio means a larger fan, and a larger fan means a larger nacelle. On a low-wing aircraft with an underwing pod, the nacelle must still clear the ground with the gear compressed and the aircraft banked.
That constraint has driven several familiar solutions: flattened nacelle bottoms, longer landing gear, and engines moved forward and up on the pylon. Thrust reversers and bleed air remain perfectly feasible, and the engine's weight is not what limits the installation - its diameter is.
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