Flaps are hinged surfaces on the trailing edge of the wings of a fixed-wing aircraft. WING "ESPN 1410" is a commercial AM radio station in Dayton Ohio operating with 5000 watts at 1410 kHz with studios offices and transmitter located on David Overview Fixed-wing aircraft range from small training and recreational aircraft to Wide-body aircraft and military cargo aircraft. As flaps are extended, the stalling speed of the aircraft is reduced. For other uses see Stall. In Aerodynamics, a stall is a sudden reduction in the lift forces generated by an Airfoil Flaps are also used on the leading edge of the wings of some high-speed jet aircraft, where they may be called slats or Krueger Flaps. Slats is also a nickname for Australian cricketer Michael Slater, and NHL executive Glen Sather Slats are Aerodynamic
Flaps reduce the stalling speed by increasing the camber of the wing and thereby increasing the maximum lift coefficient. For other uses see Stall. In Aerodynamics, a stall is a sudden reduction in the lift forces generated by an Airfoil Camber in Aerospace engineering, is the asymmetry between the top and the bottom curves of an Airfoil in cross-section The lift coefficient ( CL or CZ) is a non-dimensional coefficient that relates the lift generated by an Airfoil, the Some trailing edge flaps also increase the area of the wing and, for any given aircraft weight, this reduces the stalling speed. The Fowler flap is an example of one which increases the area of the wing.
Extending the flaps also increases the drag coefficient of the aircraft so, for any given weight and airspeed, flaps cause higher drag. The drag coefficient ( Cd, Cx or Cw) is a Dimensionless quantity that describes how streamlined an In Fluid dynamics, drag (sometimes called fluid resistance) is the force that resists the movement of a Solid object through a Fluid (a Flaps increase the drag coefficient of an aircraft because of higher induced drag caused by the distorted planform of the wing with flaps extended. The drag coefficient ( Cd, Cx or Cw) is a Dimensionless quantity that describes how streamlined an In Aerodynamics, lift-induced drag, induced drag, vortex drag, or sometimes drag due to lift, is a drag force that occurs whenever A planform or Plan view is a vertical Orthographic projection of an object on a horizontal plane like a Map. (Induced drag is a minimum on a wing with elliptical planform. In Mathematics, an ellipse (from the Greek ἔλλειψις literally absence) is a Conic section, the locus of points in a ) Some flaps increase the wetted area of the wing and, for any given speed, this also increases the parasitic drag component of total drag. Parasitic drag (also called parasite drag) is drag caused by moving a solid object through a fluid
Depending on the aircraft type, flaps may be partially extended for takeoff. Takeoff is the phase of Flight in which an Aircraft goes through a transition from moving along the ground ( Taxiing) to flying in the air usually With light aircraft, use of flaps for takeoff may be optional and will depend on the method of takeoff (e. g. , short field, soft field, normal, etc. ) When flaps are partially extended for takeoff it is to give the aircraft a slower stalling speed but with little increase in drag. A slower stalling speed allows the aircraft to take off in a shorter runway distance. Flaps are usually fully extended for landing to give the aircraft a slower stalling speed so the approach to landing can be flown more slowly, allowing the aircraft to land in a shorter runway distance. Landing is the last part of a Flight, where a flying Animal, Aircraft, or Spacecraft returns to the ground The higher drag associated with fully extended flaps allows a steeper approach to the landing site. This is the benefit of the higher drag coefficient of fully extended flaps.
Some gliders not only use flaps when landing but also in flight to optimize the camber of the wing for the chosen speed. Terminology A "glider" is an unpowered Aircraft. The most common types of glider are today used for sporting purposes When thermalling, flaps may be partially extended to reduce the stalling speed so that the glider can be flown more slowly and thereby turn in a smaller circle to make best use of the core of the thermal. A thermal column (or thermal) is a column of rising Air in the lower altitudes of the Earth's atmosphere. A thermal column (or thermal) is a column of rising Air in the lower altitudes of the Earth's atmosphere. At higher speeds a negative flap setting is used to reduce the nose-down pitching moment. In Aerodynamics, the pitching moment on an Airfoil is the Moment produced by the Aerodynamic force on the airfoil if that aerodynamic force is This reduces the balancing load required on the horizontal stabilizer which in turn reduces the trim drag - drag associated with keeping the glider in longitudinal trim. For Aircraft, the horizontal stabilizer or tailplane is a fixed or adjustable surface from which an elevator may be hinged Negative flap may also be used during the initial stage of an aerotow launch and at the end of the landing run in order to maintain better control by the ailerons. For the band with a similar name see The Ailerons Ailerons are hinged control surfaces attached to the Trailing edge of the Wing of a Fixed-wing
Types of flap systems include:
- Krueger flap - hinged flap on the leading edge. [1][2] Often called a "droop. "
- Plain flap — rotates on a simple hinge.
- Split flap — upper and lower surfaces are separate, the lower surface operates like a plain flap, but the upper surface stays immobile or moves only slightly.
- Fowler flap — slides backwards before hinging downwards, thereby increasing both camber and chord, creating a larger wing surface better tuned for lower speeds.
- Fairey-Youngman flap - moves bodily down before moving aft and rotating.
- Slotted flap — a slot (or gap) between the flap and the wing enables high pressure air from below the wing to re-energize the boundary layer over the flap. The leading edge slot is an aerodynamic feature of the wing of some airplanes to reduce the stall speed and promote good low-speed handling qualities In Physics and Fluid mechanics, a boundary layer is that layer of Fluid in the immediate vicinity of a bounding surface This helps the airflow to stay attached to the flap, delaying the stall. For other uses see Stall. In Aerodynamics, a stall is a sudden reduction in the lift forces generated by an Airfoil
- Blown flaps — systems that blow engine air over the upper surface of the flap at certain angles to improve lift characteristics. Blown flaps are a powered Aerodynamic High-lift device invented by the British on the Wings of certain Aircraft to improve low-speed
There are several technology development efforts to incorporate the function of the flaps into a flexible wing, so that the aerodynamic purpose is accomplished without the weight and mechanical complexity of a flap system. The X-53 Active Aeroelastic Wing is a NASA effort to incorporate this technology, and the Adaptive Compliant Wing is commercial development effort. WikipediaWikiProject Aircraft. Please see WikipediaWikiProject Aircraft/page content for recommended layout The National Aeronautics and Space Administration ( NASA, ˈnæsə is an agency of the United States government, responsible for the nation's public space program The Adaptive Compliant Wing is a Wing design developed by FlexSys Inc
Slats, also known as leading-edge flaps, have a similar purpose to trailing-edge flaps, except that they are located on the leading edge of the wing. Slats is also a nickname for Australian cricketer Michael Slater, and NHL executive Glen Sather Slats are Aerodynamic Note that a Krueger flap and a leading-edge slat differ in how they are extended (and retracted), but their aerodynamic function is the same.
See also
For the band with a similar name see The Ailerons Ailerons are hinged control surfaces attached to the Trailing edge of the Wing of a Fixed-wing In Aircraft design high-lift devices are a variety of mechanisms intended to add lift during certain portions of flight A circulation control wing (CCW is a form of High-lift device for use on the main wing of an aircraft to increase the Lift coefficient.Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic