Y-20A: Powered by older generation engines — originally Russian D-30KP-2 turbofans or early Chinese WS-18 copies. These engines are less powerful and less fuel efficient.

Y-20B: Uses fully domestically developed WS-20 high-bypass turbofan engines, which have higher thrust, better fuel economy, and better overall performance.

Y-20A vs Y-20B (Engines)

Y-20A: uses older D-30KP-2 or early WS-18 turbofans—lower thrust, higher fuel burn.

Y-20B: upgrades to indigenous WS-20 high-bypass engines, delivering more power, better efficiency, longer range, and improved performance.

#Y20 #WS20 #PLA #Aviation #MilitaryTech #China