Fighter jets like F-16s, Sukhois or even future 6th-gen aircraft pull 7–9 G routinely. Any reactor, no matter how small, contains delicate fuel rods, control systems and coolant structures that cannot survive such violent manoeuvres. Nuclear reactors are built for stability, not violent, sudden directional changes. This fundamental mismatch makes it virtually impossible for a nuclear engine to replace JP-8 in high-performance combat jets.

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