What the little flap that flips up on the end of a plane wing?

Also when a plane is coming in for a landing, you hear something wind down like an engine is shut off or something. I'm sure it has something to do with speed reduction.|||The little flaps near the wingtips are ailerons. They are used to make the airplane roll (bank) to the right or left. Rolling in this way is the only way for an airplane to turn (like a motorcycle or ice skater). The aileron on one side goes up, pushing that wing down, and the aileron on the other side goes down, pushing the respective wing up, and that makes the airplane roll to one side.





I'm not sure what you are hearing, but it could be adjustments in engine speed as the airplane lands. Just before touching down, the engines are reduced completely to idle, and just after touching down, thrust reversers are deployed (they direct the engine thrust back towards the front of the airplane), and the engines speed up again, so that reverse thrust can help the airplane slow down. Once the airplane is rolling slowly, the engines are set back to idle.|||I think you need the Smithurst guide to flight control surfaces.


The wing first and foremost, is an aerofoil with its primary task in life to produce lift and get you from Birmingham to Ibiza on time and safely.


However, the aircraft has to be controllable otherwise it'd be like a car with no steering wheel.


If we start from the outermost edge of the wing we have the blended winglet which stops Wing-tip vortices and if you're not sure about any of these words Google has some great information about this stuff.


The next part we have the Aileron's and these are the primary flights controls for steering and to turn left for example the right aileron will raise but the left aileron will droop slightly as to cause more lift to occur on one side of the wing.


Then working inwards we have the spoilers which are the panels that you see on the wings when landing, these raise automatically upon landing however are used upon descent sometimes to cause a rapid loss of airspeed or to descent quickly.


The last things are the the leading and trailing edge devices known as flaps and slats.


The flaps are used for taking off and slowing down and are situated at the trailing point of the wing. They help to increase lift co-efficient and also to induce drag which is required to slow to the 130kt landing speed.


The slats however increase surface area of the wing at the stagnation point which is where the two airflows separate.|||1) I'm not sure what your talking about but those flap flips you see are probable (Wing lets)or (Ailerons)


Wing lets help improve aerodynamic drag, its reduces wing tip vortices. Ailerons move up and down on the aircraft wings so it can turn.





2) The engines are not shutting off when you hear them coming in for landing, the pilot is putting the thrust levelers to idle, Idle means that the engine is not creating nor is it shut, just spinning. When the air craft is about 50 feet from the ground he puts the engines to idle, so the airplane come in for a nice landing.





Hope I helped.|||Ailerons move up and down on the outboard trailing edge of each wing. http://en.wikipedia.org/wiki/Aileron





Winglets are fixed wingtip upward pointing surfaces that reduce drag...http://en.wikipedia.org/wiki/Wingtip_dev鈥?/a>





Spoilers pop up from the wing upper surface on landing, and may be used for airbrakes in flight. http://en.wikipedia.org/wiki/Spoiler_%28鈥?/a>





The noise you are hearing is likely the flaps or landing gear being extended|||Hi


This is a Wing:





http://www.air.flyingway.com/airlogo/air鈥?/a>





10-9) This is the SPOILER they break the air on the upper side of the wing, consequently the lift is decreased and the drag is increased, this help the airplane reduce his speed and decrease the lift during landing.


5-6-7-8) This is the HIGH LIFT DEVICE, changing the geometry of the wing the airplane is able to increase the lift at low speed (or to increase his angle of attack without have stall), this device is lowered before landing for "sustain the airplane's weight at low speed".


3) This is the LOW-RATE ROLLING AILERON (used in small correction or generally for rolling the airplane at low angular speed).


2) This is the AILERON used during NORMAL-SPEED ROLLING.


1) This is the WINGLET it is a aesthetic device and aid the wing to reduce his drag (because he shield somehow the flow of air from the ventral surface to the upper surface, flow driven by the difference in pressure).


Bye bye :)|||yeah, it is called "Airbrake".


it works by giving drag for the aircraft.


simply: take a huge piece of cardboard and hold it wile running.|||Aliron?