Yes. 10 or 20 are the only take off flap settings.
it depends on what type of aircraft your flying, the runway length, and the weather. here are two common aircraft flap settings for standard takeoff use: Boeing 737: set flaps to 5 cessna 172: set flaps to 10 these are two common flap settings for the Boeing 737 and cessna 172. remember, different aircraft have differnet flap settings based on weather and runway length.
The flaps help to increase lift, which is essential to the landing and takeoff phase[s].
Flaps and slatsSlats and flaps
Flaps and stats increase lift for takeoff and slow you down, for landing.
Yes, Flaps are both used to create lift (on takeoff) and to slow the aircraft (on Landing)
They are useful for takeoff to get lift and at landing for slowing down the plane.
No. Not always. For many airplanes, it may be required if the airplane is fullly loaded.
Airplane wings are designed to be most efficient when at high altitudes, traveling fast, while providing as little drag as possible. Unfortunately this design inst the best for takeoff and landing. Flaps are used to change the shape of the wing to accommodate takeoff and landing requirements. Most planes have flaps on the front of the wings (leading edge flaps) and at the back of the wings. During takeoff flaps increase lift so a plane can take off with limited runway length and lower speeds. As the plane gains speed the flaps are retracted. On approach and landing you want to fly as slow as possible so the flaps are deployed in increments till landing speed is achieved. Landing slower means less runway needed to stop.
The flaps are controlled on the flight deck by the pilots. there is a square shaped knob coming out next to the throttle. it reads numbers that vary depending on the aircraft. that controls the position of the flaps. but that's on Boeing, the position can change depending on weather the aircraft is smaller, like a Cessna, or larger, like Boeing aircraft.
The first point is to understand what flaps do. They create more wing surface area when they are extended, therefor creating more lift at slow speeds. TAKEOFF: Depending on the aircraft you are flying, may be a Cessna 170 or a 747, it all depends on the manufacturer of the aircraft. They may say at when you have X weight, you need no flaps but when you have a completely heavier weight, you may need flaps. *do not use this information for real flying.
10 or 20 for take off 25 or 30 for landing
Increase speed and/or lift. You want the pressure above the wing to be lees than below. In very short times like takeoff, the flaps are increased to sacrifice speed for lift. As the a/c speed increases the flaps are slowly retracted until the wing is at its optimal setting. (Flaps moving is that mechanical noise you hear during takeoff and landing).