Tuesday, September 27, 2011

What is the stalling speed for a plane?

In Beever plane, the flaps reduce your stalling speed. I read this.





But, what is stalling speed? Can anyone just tell me by a very simple way? I have almost none-knowledge of flight.|||The stalling speed of an aircraft is the critical airspeed at which the wing cannot create enough lift to maintain flight.





Stalling speed varies with different aircraft as lift is due to the shape and size of the wing as well as it's cross-sectional shape.





A lower stalling speed can be achieved by deploying wing mounted flaps and slats. These devices effectively provide more lift for the same airspeed.|||Happy to be of assistance.

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|||It's not a constant as it varies due to wind speed, plane, and flap setting. An overladen plane has a higher stall speed, and a head wind has the effect of lowering the stall speed - hence you try to take off into wind.





Basically it's the speed at which the lift force from the wings making the plane ascend is less than the gravitational force pulling it down.|||I Agree with marty.





In addition the stall speed is determined by air density (altitude) weight and the wing surface (size).





You can't just come up with a standard stall speed because on the same aircraft it can change.|||Stall Speed as the minimum speed at which the wings can produce sufficient lift for level flight|||The forward movement of the plane through the air and the shape of the wings gives the wings 'lift'. By altering the shape of the wings (flaps) gives the wings more 'lift' Unfortunately more flaps means more problems at speed and far more fuel used, so flaps are not used as the plane speeds up. So a small plane, in still air, would not get enough 'lift' at below about 50 mph, so it would STALL and just fall out of the sky. Applying flaps at 50MPH would give more 'lift' so it could still fly at 35 mph, below this speed it would STALL. On large jets these speeds are far greater but the same principle applies.|||its the speed that cause aircraft to descend automatically


its like u through something in air when ur force which u apply is reduce or consume the thing u through will come down but did u noticed its not falling straight away it'll go down in a particular way|||The good doctor above has it wrong. A headwind has nothing to do with the stall speed. You takeoff into a headwind because you use less runway but the airspeed at which the airplane reaches it's critical angle of attack and stalls remains constant at a given aircraft weight and load factor. As the weight and/or load factor increases however, the speed at which the critical angle of attack is reached increases proportionately.|||The stalling speed is the airspeed at which the airflow over and under the wings can no longer support the aircraft and it will just fall.





Basically the faster a plane goes the more lift is produced by the wings. The slower, the less lift is produced. Flaps are extendable surfaces on the wing that increase the wing area. The more wing area the more lift is produced for a given airspeed.


When you are travelling in a car, put your hand out of the window and level with the ground. Then tip your hand so the front edge is higher. See how the airflow lifts your hand more? Its the same principle.





To get an aircraft to cruise at the required speeds safely you dont want that extra lift so you have to retract the flaps so you have a clean wing (a normal shaped wing). On approach and landing and take off it involves low speed handling and the flaps enable the pilot to increase their level of control and lower the landing speeds so it is safer for the aircraft or passengers.





The stalling speed is a certain speed (different for all aircraft and changes in weather conditions) at which the flaps do not compensate for the lack of airspeed and the plane will just fall, literally. The nose of the aircraft may still be level with the horizon or even pitched up but its still losing height and falling.





To prove it do the hand thing on a main road then slow down and see how it affects the lift on your hand. No matter what angle you put your hand at it will fall, thats stalling because there is insufficent lift.|||I agree with Marty if you are after a simple answer..|||futuretopgun is correct with his answer , I know this because i have worked in and around aircraft and jet engines for over 20 yrs .|||4 factors affecting aircraft flying 1) weight, 2) lift, 3) thrust, 4) drag. IF 2 %26amp; 3 are greater than 1 %26amp; 4, it will fly. Anytime 4 is greater than 3 or 1 is greater than 2, it stalls (quits flying).|||Hey I'am enjoying this informative debate. carry on Guys|||Whatever the plane, large or small, if it stalls and you are beneath it - run like hell in the other direction ! ! !





Lively runner ! !

2 comments:

  1. Hi guys new to the thread but have a question. My instructor and I have different views. Iam flying a late model high wing high glide plane he instructs in an earlier model completely different , He likes to approach landings with power off glide in at speed. I like to set speed as per manual POH control my rate of descent with power not gaining speed and kill power on touch down. This way I have more control over wing gusts.
    Ect As a result my approach is slower but controlled.
    He thinks its a phantom stall , its not. POH says 1.2-1.3 of stall with one stage flaps is 40kts which makes approach around 48-53 land 38 kts if I nose down kill power my plane will gain to 65 easily and float for ever.I understand you can have power on stalls on take off ect wing drop but the use of power at low speed makes for a safer controlled landing vs high speed no power. The fastest person is not the strongest but the most stable.
    Acorobats commercial pilts approach power on . would love some help, please.

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  2. Sorry guys meant to say the strongest is the most stable not the fastest . My bad

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