Questions tagged [flaps]

Surfaces that extend from the wings to increase lift, allowing flight at slower speeds (such as for takeoff and landing).

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18
votes
3answers
6k views

Why do slats deploy first?

I know on the 737, the leading edge slats deploy at the first flap setting, and the trailing edge flaps deploy after that at higher flaps settings. Why do the slats deploy before the trailing edge ...
19
votes
3answers
8k views

Why did Cessna get rid of manual flaps in their 172?

At the club I fly at, there is an older Cessna 172 that has a manual "Johnson Bar" that is used to put the flaps down. In the newer 152, and I believe the rest of the planes (I have yet to fly them), ...
10
votes
2answers
2k views

In the upper air, do pilots use flaps to generate lift as well slow down an aircraft?

I know, flaps are mostly used during take-off or landing to generate both lift and drag simultaneously. I am wondering if the pilot uses flaps to generate more lift so that they can climb in less ...
19
votes
2answers
53k views

What is the difference between flaps and slats?

I have heard pilots talk about flaps and slats, seemingly interchangeably. Is there a difference between a flap and a slat or they are the same thing?
2
votes
0answers
112 views

Raising flaps on touchdown in gusty conditions [duplicate]

In As the Pro Flies, John R. Hoyt writes (pages 41-42): Suppose we have to land in high, gusty winds. That's what happened to Pilot Z, who once landed his plane during such conditions with his ...
21
votes
5answers
36k views

Should full flaps be deployed on takeoff?

Are full flaps ever used on takeoff? One flying book I read strongly discouraged anything more than quarter flaps on most planes due to the amount of drag produced. I was just wondering if there are ...
13
votes
1answer
3k views

What is the meaning of flap detent names (e.g., 10 degrees)?

When I extend my flaps to 10 degrees, what exactly is the 10 degrees measuring? Is this referring to the angle of the flap blades themselves, the new angle of the wing chord, the change in the new ...
75
votes
14answers
21k views

Is it considered good or bad practice to raise the flaps right after touchdown?

This question is about light, tricycle, single engine aircraft. I have made it a habit to raise the flaps right after touchdown (when the nosewheel is on the ground). My instructor used to do that ...
9
votes
2answers
5k views

How does a flap load relief system work?

I recently read about flap load relief systems in some aircraft that attempt to prevent flap overspeeds by automatically retracting flaps under certain conditions. Are these systems common on all ...

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