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What is the stall speed of a 747 with flaps down?
At altitude hold trim, about 140 knots (about 160 mph.)
What are the flaps on an airplane used for?
The flaps on an airplane are there for two reasons: Drag and lift. As an airplane lines up with the runway and descends, it must slow down. Several things are done to slow down, such as throttle the engines down and lower the gear. However is some airplanes, to slow down and remain slow they must extend the flaps. These cause extra drag, which slows the airplane down. They are usually extended in increments while on approach. The second reason is for lift. As an airplane get slower, the wings get less and less effective, and once it gets slow enough, it may stall. To prevent a stall, airplanes lower flaps. These redirect air downward, pushing the airplane up. This allows it to fly slower, past its "clean" stall speed. (Clean stall speed refers to an airplane's stall speed with no flaps or landing gear extended) Some airplanes can fly nearly 100 knots slower with full flaps. The stall speed with full flaps and landing gear extended is known as "dirty" or "landing configuration" stall speed. This is much slower than "clean" stall speed.
What are the purposes of the slats and flaps of an airplane's wings?
Slats and flaps increase drag and also increaselift. The increase in drag slows the aircraft down, and the increase in lift lowers the stall speed, which slows the landing speed of the aircraft.
What is flaps on in aircraft?
The flaps on an aircraft are on the trailing edge of the wing and vertical stabiliser on the tail and are hinged to wing downwards. By bringing these down the stall speed of an air craft may be reduced allowing it to slow down more upon landing and to be able to reach air speed more quickly upon take off.
What is the stall speed of a Boeing 737 airplane?
The stall speed depends on the model, weight and configuration of the 737. The stall speed with full flaps and gear down for a Boeing 737-800 is :140,000 lbs 146 KIAS, 120,000 lbs 135 KIAS and 100,000 pounds 123 KIAS. At higher weight and with the flaps up the stall speed is higher. KIAS is an abbreviation for "knots indicated air speed", the indicated air speed is linked to air pressure and temperature, so at a hot and high altitude airfield the same KIAS is a much higher true air speed. So the aircraft stalls at a higher true air speed at higher altitude, but the indicated airspeed remains the same.
What speed do planes need to go to stay in the air?
The speed a airplane needs to go to stay in the air, depends on the plane. Each plane has different factors, such as weight, manureverability and the conditions which it is flying in.In general, the speed a plane needs to stay at, is the level of it's "Stall Speed". A "Stall", is when a airplanes engine/propeller stops moving. This gradually slows down the aircraft, which then will bring the plane lower and lower. Also the planes "Flaps", the parts of their wings that can tilt, can change the speed and how long it will travel until it will come to ground level.Google Stall Speed and the plane you are inquiring about to get the exact figures.
How do airplanes come down?
They reduce engine speed and extend 'flaps' which allows the wing to keep lift at lower speed.
Do airplane need flaps to fly?
They don't really need them to fly. However they are very useful for keeping a plane flying when you slow it down on landing and using flaps on take of means that you reach flying speed at a lower speed. The runways would have to be a lot longer if planes had to land and take of without flaps because they would have to land flat out at air speed.
What are those flap like things that open on an airplane's engine when it lands?
You got it in one they are flaps. the wings have flaps and ailerons and sometimes an extra control surface that goes upwards to help it slow down. In any case the flaps are the control surfaces on the back of the wing that move down as the plane slows down to land. they stop the plane from stalling and falling out of the sky. a very irritating thing if it happens especially when you are close to the ground. by using the flaps the plane is able to keep flying at a lower speed prior to landing. if there were no flaps the plane would have to come in at high speed or fall out of the sky.
If planes flaps down does plane ascecnd?
Not necessarily, flaps are used to increase surface area of the wing thus producing more lift and slowing it down but at low speeds of about 135 knots/240MPH it's effect is very minor on the speed.
Does a c-130 have speedbrakes?
The C-130 does not have a speed brake. They use a combination of brakes, flaps, and reverse thrust to slow down.
What would be the speed of a flight while landing?
It all depends upon the type of aircraft, the weight of the particular aircraft, the altitude of the runway and the temperature. For example, a little Cessna 150 with full flaps extended does a full stall landing at about 45 MPH at zero altitude and 60 degrees. With the flaps up, it is faster by about 10 MPH. At 5000 feet on a hot day in Denver Colorado, it would be a lot faster .... maybe 70 MPH. A lightly loaded jetliner at sea level on a not very hot day with full slats and flaps down will go over the numbers at about 150 KPH (ABOUT 160 mph). So, there are no absolute numbers but in practice, the landing speed picked by the pilot will be the lowest speed available over the stalling speed ( with a 10% or so cushion) based upon the aircraft with a reasonable angle of attack and full flaps and gear extended.
