Mechanical flaps on a current airliner

Mechanical flaps on a current airliner
The flaps on the wings of today’s commercial airliners are actuated via a complicated mechanism. Their arrangement and the resulting gap when extended compromise the aerodynamics, increases fuel consumption and contributes to inflight noise.
Here, the DLR A320 ATRA research aircraft during slow flight tests.
Credit:

WTD61.

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