Sound — 787 Flaps

For example, the Airbus A350, a competitor to the 787, produces a different sound when its flaps are moved. The A350’s flaps are driven by hydraulic actuators, which produce a more low-pitched rumble compared to the 787’s electric motors.

The Boeing 787 Dreamliner produces a distinctive sound when its flaps are moved, often described as a high-pitched whine or a “whooshing” noise. This sound has been reported by passengers, pilots, and observers on the ground. The noise is most noticeable during takeoff and landing, when the flaps are extended or retracted. 787 flaps sound

While the 787’s flap sound may be unusual, it has no impact on the aircraft’s performance or safety. The sound is simply a byproduct of the advanced technology and design features that make the Dreamliner such an efficient and capable aircraft. For example, the Airbus A350, a competitor to

The 787’s flaps also feature a unique “double-slotted” design, which allows for more efficient lift generation and better control during low-speed flight. This design involves two separate flap surfaces that move in tandem, creating a distinctive sound as they extend or retract. This sound has been reported by passengers, pilots,