What are these?


So I have seen these on most planes, and I see them deploying downwards as the flaps are extended. What are they and what are they used for?

I think you are talking about the flaps cover

An aircraft fairing is a structure whose primary function is to produce a smooth outline and reduce drag. These structures are covers for gaps and spaces between parts of an aircraft to reduce form drag and interference drag, and to improve appearance.

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These are pretty much an aerodynamic cover for the flap mechanism. Their sole porurpose is to be aerodynamic.

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Thanks for clarifying. So not needed, but helpful, especially when it comes to fuel efficiency. So kinda like winglets?

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Iโ€™m tryna find an image of these removed but failing miserably ๐Ÿ˜‚

image
Bad quality

Yea, just imagine the drag that would create.

Also the covers could protect the mechanism from the strong wind experienced at cruising

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Why do they have to extend further out though?

wdym?

They stick out from behind the wing, but it seems like they donโ€™t have to

Good question, but I think this image can explain

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Ooooh. Now it get it. So those things are the hydraulics for the flaps. Thanks for the image.

just imagine the drag these things would cause

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Yeah makes sense. Especially when flaps are deployed.

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