Unrivaled Giants: Unveiling the World's Largest and Costliest Military Aircraft
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8. Sukhoi FA T-50 PAK FA
Entered Service: 2002
Retirement Status: N/A
Program Cost: $8–10 Billion
The single-seat, twin-engine Sukhoi PAK FA—nicknamed Felon—is Russia’s fifth-generation stealth fighter. Designed for the Air Force and Navy, it features advanced avionics and low-observable technology.

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Sukhoi PAK FA T-50
Known internally as the T-50, it will evolve into the Su-57, the first Russian jet to fully embrace stealth. Its future export path remains uncertain but closely watched.
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