Sico2
Sico2
First OfficerFirst Officer
Joined: Mar 17, 2006 Posts: 152 Location: Liverpool,UK EGGP/LPL
Asked

Hiya all,

http://www.airliners.net/open.file/0576045/M/

I know how flaps increase aircraft to stay in the air with very low speed etc, but as you can see on above mentioned image, the furthest (closest to the fuselage) flap are set up almost vertically. Doesn't the air flow exactly against it making it almost a spoiler? I know flaps fully extended create extra curve to increase the way of the air circuling the wing, but in 777 it's very 'curved' doesn't it cause too much air drag and brake the plane too much?

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CRJCapt
CRJCapt
Chief CaptainChief Captain
Joined: Sep 12, 2005 Posts: 3723 Location: Ohio,USA
Answered

Sico2 wrote:

in 777 it's very 'curved' doesn't it cause too much air drag and brake the plane too much?

Apparently not, I don't know the maximum flap deflection for the Boeing 777. Considering the size, weight and the leading edge devices, it's feasible. Some aircraft move the flaps to a more deflected position upon touchdown automatically. This is part of the lift dump system which includes ground spoilers. 🙂

Sico2
Sico2
First OfficerFirst Officer
Joined: Mar 17, 2006 Posts: 152 Location: Liverpool,UK EGGP/LPL
Answered

relly? Never heard of it. Also never spotted on videos anything like that.

But it is still pretty amazing when you see 777 approaching and the flaps and their position making almost a second wing out of them.

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