¿ A specific engine sound from Boeing 757 before landing , what means That sound?

Question:
Is this sound is an engine break or what?
thank for your answer

Answers:

Aiplaine help?

Ok, some people have mentioned thrust reversers, they do not depoly untill its on the ground due to the extreme braking powers it has. The sounds you may be hearing is the hydraulic pump running which can add to a distinstive noise over the turbofan engine. It is used to operate the landing gears and set the flaps for landing. During this process the engine will slow down and various sounds will come from the body which will add to the engine's noise. The hydrualic pump is very noisy same with the hydualics moving the landing gears and flaps. Once the flaps deploy it changes the wind going over the wings same with the sound.

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Radio controll helicopter?

nope

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can a 737/ A320 land into a carrier??

You're probably referring to the sound that is made when the landing gear comes down.

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why do jet airplanes usually fly at altitudes above 30,000 ft. though it takes a lot of fuel climbing dat high

Zooooommmmm Brrrroooom Brrrrroooom?

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i am bought an austin allegro for £10 was this a bargain?

the engine is slowing down very rapidly

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why on Ryanair are seats NOT to be sat on?

reverse thrust to slow plane down, a shield folds down behind engines to send thrust forward

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Why doesn't Finnair use Boeing aircraft but MD-11,Embraer and Airbus only?

all car-aholics, people who are crazyy about cars, who obssess with cars, know all different sounds that different engines make. That statement was probably made by som eone who can differentiate between sounds of engines. In this case, that sound would be of a Boeing 757 landing. The sound is not necessarily of an engine breaking. It's just a specific sound made by the engine when landing.

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How much does a commercial pilot lisence cost?

ya whats it sound like? pretty hard to say. The engines dont have breaks. The engine can be used as a brake by redirecting thrust, thats why the engine goes into a higher RPM after landing. If the aircraft is coming in too low he will also give it more throttle.

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please, can anyone help me find out the TOTAL number of aircraft registrations by country or continent?

wing flap direction has changed

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My son has Just said he saw a pilot flying low?

exactly when did you hear that sound, and how did it sound?

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Def. the landing gear coming down. Since their is a no form of drag on the belly of the plane, when the extend, that is the first (and only) source of drag on the bottom. The sound is the gear breaking the air (essentially drag).

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Go with Markie's answer it's correct.

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can i land on mt. everest in a helicopter??

I'm thinking you are hearing the flaps deploying, or the engines have been throttled up to maintain/increase airspeed when the aircraft levels out on approach.

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What happeded to the Iragi fighter jet that landed in New York?

probably the landing gear like everyone has said above me!

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