. on Instagram: "Here is the English text, clearly written and corrected: Before a fighter jet ever touches the sky, its engine must endure the closest thing to hell on Earth. 🔥 Inside a test cell, engineers push the Pratt & Whitney F100 engine—the heart of the F-15 Eagle—to its absolute limits. It is blasted with hurricane-force airflow, extreme heat, and violent vibration, simulating the most brutal conditions it will ever face in flight. Thousands of sensors monitor thrust, fuel flow, exhaus