When Do Pilot's Lower the flaps?

Question

Is it all at one time or is it during the final descent? (spread out over time)

Answer 1

well basically i guess you extend full flaps while landing so that you are able to float up and gradually maintain your approach speed while descending.!without flaps your aircraft would land on the nose wheel with the others.but you don't want that to happen..you want to touch down with the rears first and den the nose wheel so that it gets less impact!please specify if you wanna know the distance from the airport and the aircraft types for extending flaps....

Answer 2

The plain,has two both situations were flaps had to lower place at the wing structure.

one is in the landing and the another one is in the take-off

The rquestion is the plain in two both situations, need to present the maximum air Resistance in order to fly at lower speed.This situation  is the best putting the engines at the  full power.

best regards

Answer 3

15 Nau. Mi. -> 5/10deg.

1-12 Nau. Mi-> 20/25 deg

Before capturing G/s-> 30 degrees |& LDG down.

This is standard on an ILS/DME approach. On a visual approach you have the freedom of varying your airspeed and flaps till the final approach.

Answer 4

Penetration flaps (partially down) are used during IFR descents.

Full flaps are lowered on the final approach while coming in to land, prior to lowering the landing gear.

Answer 5

Hmmm well when I'm in the 737 I usually lower 5 degrees at 15 nm from my destination, then gradually lower as needed.

To the dude below me; W T F - Flaps don't pitch the nose up WTF d**n. THEY LOWER THE STALL SPEED. THEY CONTROL THE PITCH WITH THE ELEVATOR WHICH HAS ABSOLUTELY NOTHING TO DO WITH FLAPS.

Answer 6

In single engine planes we put in one notch when abeam the runway threshhold on downwind leg, 2nd notch on base leg, 3rd notch when stable and you know you are going to make the rway on final leg. Nobody seems to have read your question.

If you are asking about putting down flaps in a jet airliner say so because that is a bit different but essentially the same effect.

Answer 7

As the plane slows down the pilot lowers the flaps. And at landing the spoilers go out.

Answer 8

i think just landing and sometimes taking off

Answer 9

We stick them out when we need to.  They help in slowing the aircraft and may be needed if we are given airspeed restriction.  I've had to extend flaps 1 in the 757 15 minutes prior to landing.  

In the situation of unlimited speed to the runway, most guys won't start to dirty up till 15-20 miles out.  Then we do it in stages.

Answer 10

well from looking out the plane window, they extend out from the wing straight, so air goes between the flap and wing during final descent and when the plane hits the runway, they drop down to help slow the plane.

Answer 11

The purpose of flaps is to allow an aircraft to descend more steeply, without an increase in airspeed.

     For small aircraft, flaps are usually used when landing. Commonly accepted is the method of using the first setting of flaps while on downwind, putting in a second setting on base, and adding any additional flap settings while on final to help adjust the glideslope. Back to your question, this would mean that they are spread out over time during the final descent. This is similar with larger aircraft. There are speed limitations to the flaps; only a certain degree of flaps can be extended at a certain airspeed, before the structure is damaged. As the aircraft slows down, more and more flaps are extended to help slow down the aircraft, and bring it to the runway.

     However, small aircraft and large aircraft can also use flaps to take off in a shorter distance. Usually there is a limit to how many degrees of flaps can be used during the takeoff, because when flaps are extended there is a point at which they stop producing lift, and instead just contribute to the drag. Very large airplanes, however, may require that flaps are extended during the takeoff, to help create more lift at slower speeds.

Hope this helps

Answer 12

provides extra lift at slower speeds.