How The C-17 Globemaster’s Externally Blown Flap System Creates Landing Noise Challenges No Other Military Transport Faces

Simple Flying

The BoeingC-17 Globemaster is the only operational military transport aircraft that uses an externally blown flap system, a propulsive lift configuration in which engine exhaust is directed onto extended wing flaps to generate additional lift at low speeds. The system allows the C-17 to land payloads exceeding 160,000 pounds (72,575 kg) on runways as short as 3,000 feet (914 m), a capability that no other strategic airlifter can match.

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