Flaps 1

Do flaps 1 really make a difference?

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Yes they do. Flaps help you slow down and the 1 setting also helps for a smooth takeoff

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I think flaps 1 is mostly lift with very little drag. I think it is only on flap settings of 10 or more where you get significant drag as well.

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Please elaborate a bit more. Do you mean Flap 1 on an Airbus or on a Boeing?

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Good point. Sorry I had assumed Boeing.

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Flaps 1 really just extends the slats to their first detent.

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And the trailing edge flaps?

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If the runway is too short you have to turn on flap to 1 or 2 so wind can lift the plane up smoother.

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If you have a short runway I would have thought you need a higher flaps setting so you can take off sooner at a lower VR rather than a lower flaps setting?

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Yes correct, just practise on your own way.

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On a 737 flaps 5 or 10 is SOP for takeoff, if you use 1 or 2 you will get an alarm for takeoff config.

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if i takeoff in a boeing i use flaps 5 for takeoff :)

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if im on a short runway ill use flaps 10

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On some planes like the 737 are more than capable for using flaps 1 for takeoff. This setting does extend both slats and flaps so you will not get a takeoff config. At united are SOP is to use flaps 5 but for performance limited runways we may use different setting…i think i said too
Much

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It’s ok, we know different airplane, different runway length etc, we just need practise and familiar with it.

On a boeing

Before takeoff I always make sure i have my aircrafts flap settings set to there lowest

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