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777 Flaps  
User currently offlineTekelberry From United States of America, joined May 2003, 1459 posts, RR: 4
Posted (11 years 2 months 4 weeks 22 hours ago) and read 1560 times:

I recently took a trip on a 777 and noticed that one of the flaps closer to the plane..or what appeared to be a flap...wasn't actually secure and was wiggling up and down. Is this normal? It didn't seem to affect anything...

5 replies: All unread, jump to last
 
User currently offlineAJ From Australia, joined Nov 1999, 2391 posts, RR: 24
Reply 1, posted (11 years 2 months 4 weeks 22 hours ago) and read 1544 times:

I think you're referring to the high-speed aileron, situated between the inboard and outboard trailing edge flaps behind the engine pylon. It is the primary source of roll control at high speed (flaps up), with both the high-speed and low-speed (located towards the wing tip) used when the flaps are extended. Roll control spoilers are also used when high roll rates are required.

User currently offlineAJ From Australia, joined Nov 1999, 2391 posts, RR: 24
Reply 2, posted (11 years 2 months 4 weeks 22 hours ago) and read 1538 times:

You can see them clearly in this shot deflected down (a trait borrowed from the 767 to reduce the pitch attitude on approach). They are outboard of the double slotted inboard flap directly behind the engine pylons:

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Click here for bigger photo!

Photo © Carlos Borda


On the ground when the hydraulics aren't pressurised both high-speed ailerons droop.


User currently offlineTekelberry From United States of America, joined May 2003, 1459 posts, RR: 4
Reply 3, posted (11 years 2 months 4 weeks 21 hours ago) and read 1528 times:

Yep, those are the "things" I was talking about. You learn something new everyday...

User currently offlineJBirdAV8r From United States of America, joined Jun 2001, 4490 posts, RR: 21
Reply 4, posted (11 years 2 months 4 weeks 21 hours ago) and read 1512 times:

These are getting into technical aeras I don't have very far-reaching knowledge about, but the "wiggling" you referred to that didn't seem to have much effect on the airplane...is this part of the AFCS? If so, its purpose is to maintain directional/longitudinal stability of the airplane.


I got my head checked--by a jumbo jet
User currently offlineEjazz From United Arab Emirates, joined May 2002, 722 posts, RR: 33
Reply 5, posted (11 years 2 months 4 weeks 20 hours ago) and read 1483 times:

On the B777 its actually a "Flaperon"

The flaperons provide roll control as per an aileron but to increase lift they move down and aft in proportion to trailing edge flap extension.

Cheers



Etihad Girl, You're a great way to fly.
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