How Much Flaps Should Be Used During Takeoff?

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Hi guys,

So I was wondering, how do you know how much flaps are needed during takeoff? Are there certain situations where more flaps should be used or are the angle of flaps set to a certain standard?

Thanks!

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So for the airbus! Flaps 1 and if heavy the flaps 2

Boeing flaps 5 and if heavy flaps 10-15

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Then may I ask for the A380 would you still set flaps to 2? Since it is a super…
Cheers!

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The larger aircraft have Flaps 1 + F

And it depends how much you load into the aircraft! so if you have max fuel and lots of passengers then its heavy and then can use Flaps 2

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Understood! Thanks!

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Not so fast on the A380!

@Josh_Chan_IFHK
@George_Anastasis

The A380 should be on MINIMUM flaps 2, and flaps 3 when particularly heavy or in ‘thin air’.

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oh damn… been doing it wrong all this time 😭😭

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It also depends on the length of the runway

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Flaps 5-10

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Got it! Thanks!

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No worries

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I set flaps10 on 747

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Flaps 20 on the 747-400 if you want to follow BAs procedures

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Runway length, plane load, temperature, initial climb profile, thrust settings are all relevant as to which flap settings to use. Lower weight + longer runway generally require less flaps. A fully loaded 737-8 taking off on a short runway such as DCA will likely need more flaps.

In general — very general — the more flaps, the lower the Vr speed (rotation speed), and the greater ability to control the airplane at lower speeds due to more surface area of the wings.

If you can get a hold of the crew operations manual for a specific plane, you can find out what the manufacturer recommends. Generally, each airline has a software program that crew enters certain parameters into and receives recommended flap setting and V speeds.

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