A spoiler is an automotive aerodynamic Automotive aerodynamics is the study of the aerodynamics of road vehicles. The main concerns of automotive aerodynamics are reducing drag , reducing wind noise, minimising noise emission, and preventing undesired lift forces and other causes of aerodynamic instability at high speeds. For some classes of racing vehicles, it may also be important to device whose intended design function is to 'spoil' unfavorable air movement across a body of a vehicle in motion. Spoilers on the front of a vehicle are often called air dams, because in addition to directing air flow they also reduce the amount of air flowing underneath the vehicle which reduces aerodynamic lift A fluid flowing past the surface of a body exerts a surface force on it. Lift is defined to be the component of this force that is perpendicular to the oncoming flow direction. It contrasts with the drag force, which is defined to be the component of the surface force parallel to the flow direction. Spoilers are often fitted to race Auto racing is a motorsport involving racing cars. It is one of the world's most watched television sports and high-performance sports cars The term sports car has been defined as "an open, low-built, fast motor car." The term describes a class of automobile with two seats, two doors, precise handling, brisk acceleration, and sharp braking — trading practical considerations such as passenger space, comfort, and cargo capacity — for driving enjoyment.[citation needed], although they have become common on passenger vehicles as well. Some spoilers are added to cars primarily for styling purposes and have either little aerodynamic benefit or even make the aerodynamics worse.
Spoilers for cars are often incorrectly confused with, or the term used interchangeably with, wings. Automotive wings A wing in this context is an aerodynamic device intended to increase drag and/or generate down force on an automobile or provide aesthetics. The angle of attack of the wing on some cars can be adjusted to increase downward force over the rear wheels, but it has the dual result of increasing drag. The precise physics of the effects of these are devices whose intended design is to generate downforce Downforce is a downwards thrust created by the aerodynamic characteristics of a car. The purpose of downforce is to allow a car to travel faster through a corner by increasing the vertical force on the tires, thus creating more grip as air passes around them, not simply disrupt existing airflow patterns.
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Operation
Spoilers function is to increase speed of a vehicle by disrupting or diffusing the airflow passing over and around a moving vehicle as it passes over the vehicle. This diffusion is accomplished by increasing amounts of turbulence flowing over the shape, "spoiling" the laminar flow Laminar flow, sometimes known as streamline flow, occurs when a fluid flows in parallel layers, with no disruption between the layers. In fluid dynamics, laminar flow is a flow regime characterized by high momentum diffusion and low momentum convection. It is the opposite of turbulent flow. In nonscientific terms laminar flow is "smooth," and providing a cushion for the laminar Laminar flow, sometimes known as streamline flow, occurs when a fluid flows in parallel layers, with no disruption between the layers. In fluid dynamics, laminar flow is a flow regime characterized by high momentum diffusion and low momentum convection. It is the opposite of turbulent flow. In nonscientific terms laminar flow is "smooth," boundary layer.[citation needed] Often spoilers are added solely for appearance with no thought towards practical purpose.
Passenger vehicles
This Toyota MR2 The Toyota MR2 is a two-seat, mid-engined, rear wheel drive sports car produced by Toyota from 1984 until July 2007 when production stopped in Japan. Sales in North America ended in 2005. There are three different generations of the MR2, often referred to as MKI , MKII (1990-1999), and MKIII (2000-2007).[citation needed] sports car Sports cars can be either luxurious or spartan, but driving and mechanical performance is requisite. Many drivers[who?] regard brand name and the subsequent racing reputation and history as important indications of sporting quality , but some exotic car brands, such as Lamborghini, which do not race or build racing cars, are also highly regarded has a factory-installed rear spoiler.The main design goal of a spoiler in passenger vehicles is to reduce drag and increase fuel efficiency. While many often imitate wings and airfoils An airfoil or aerofoil (in British English) is the shape of a wing or blade (of a propeller, rotor or turbine) or sail as seen in cross-section, these serve mostly decorative Beauty is a characteristic of a person, animal, place, object, or idea that provides a perceptual experience of pleasure, meaning, or satisfaction.[citation needed] Beauty is studied as part of aesthetics, sociology, social psychology, and culture. An "ideal beauty" is an entity which is admired, or possesses features widely attributed purposes. Passenger Crew members , as well as the driver or pilot of the vehicle, are usually not considered to be passengers. For example, a flight attendant on an airline would not be considered a "passenger" while on duty, but an employee riding in a company car being driven by another person would be considered a passenger, even if the car was being vehicles A vehicle is a device that is designed or used to transport people or cargo. Most often vehicles are manufactured (e.g. bicycles, cars, motorcycles, trains, ships, boats, and aircraft) can be equipped with front and rear spoilers. Front spoilers, found beneath the bumper, are mainly used to direct air flow away from the tires A tire or tyre (in British English) is a ring-shaped covering that fits around a wheel rim to protect it and enable better vehicle performance by providing a flexible cushion that absorbs shock while keeping the wheel in close contact with the ground. The word itself may be derived from the word "tie", referring to the outer steel ring to the underbody where the drag coefficient In fluid dynamics, the drag coefficient is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment such as air or water. It is used in the drag equation, where a lower drag coefficient indicates the object will have less aerodynamic or hydrodynamic drag. The drag coefficient is always associated is less. Rear spoilers, which modify the transition in shape between the roof and the rear and the trunk and the rear, act to minimize the turbulence at the rear of the vehicle.
Sports cars are most commonly seen with front and rear spoilers. Even though these vehicles typically have a more rigid chassis and a stiffer suspension to aid in high speed maneuverability, a spoiler can still be beneficial. This is because many vehicles have a fairly steep downward angle going from the rear edge of the roof down to the trunk or tail of the car. At high speeds, air flowing across the roof tumbles over this edge, causing air flow separation. The flow of air becomes turbulent and a low-pressure zone is created, increasing drag and instability (see Bernoulli effect Bernoulli's principle can be applied to various types of fluid flow, resulting in what is loosely denoted as Bernoulli's equation. In fact, there are different forms of the Bernoulli equation for different types of flow. The simple form of Bernoulli's principle is valid for incompressible flows and also for compressible flows (e.g. gases) moving). Adding a rear spoiler makes the air "see" a longer, gentler slope In mathematics, the slope or gradient of a line describes its steepness, incline, or grade. A higher slope value indicates a steeper incline from the roof A roof is the covering on the uppermost part of a building. A roof protects the building and its contents from the effects of weather. Structures that require roofs range from a letter box to a cathedral or stadium, dwellings being the most numerous to the spoiler, which helps to delay flow separation. This decreases drag, increases fuel economy, and helps keep the rear window clean.
Due to their association with racing, spoilers are often viewed as "sporty" by consumers.
Material types
Spoilers are usually made of:
- ABS plastic Acrylonitrile butadiene styrene (chemical formula (C8H8)x· (C4H6)y·(C3H3N)z) is a common thermoplastic used to make light, rigid, molded products such as piping (for example plastic pressure pipe systems), musical instruments (most notably recorders and plastic clarinets), golf club heads (used for its good shock absorbance), automotive body – Most original equipment manufacturers An original equipment manufacturer, or OEM, manufactures products or components that are purchased by a company and retailed under that purchasing company's brand name. OEM refers to the company that originally manufactured the product create spoilers produced by casting ABS plastic Acrylonitrile butadiene styrene (chemical formula (C8H8)x· (C4H6)y·(C3H3N)z) is a common thermoplastic used to make light, rigid, molded products such as piping (for example plastic pressure pipe systems), musical instruments (most notably recorders and plastic clarinets), golf club heads (used for its good shock absorbance), automotive body with various admixtures, which bring in plasticity to this inexpensive but fragile material. Frailness is a main disadvantage of plastic A plastic material is any of a wide range of synthetic or semi-synthetic organic amorphous solids[citation needed] used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce costs. Monomers of plastic are either natural or synthetic, which increases with product age and is caused by the evaporation of volatile phenols Phenol, also known as carbolic acid, is an organic compound with the chemical formula C6H5OH. It is a white, crystalline solid. This functional group consists of a phenyl, bonded to a hydroxyl . It is produced on a large scale (about 7 billion kg/year) as a precursor to many materials and useful compounds. It is a mildly acidic compound that.
- Fiberglass Fiberglass, , is material made from extremely fine fibers of glass. It is used as a reinforcing agent for many polymer products; the resulting composite material, properly known as fiber-reinforced polymer (FRP) or glass-reinforced plastic (GRP), is called "fiberglass" in popular usage. Glassmakers throughout history have experimented – Used in car parts production due to the low cost of the manufacturing process. Fiberglass spoilers consist of fiberglass Fiberglass, , is material made from extremely fine fibers of glass. It is used as a reinforcing agent for many polymer products; the resulting composite material, properly known as fiber-reinforced polymer (FRP) or glass-reinforced plastic (GRP), is called "fiberglass" in popular usage. Glassmakers throughout history have experimented filler fastened with synthetic In chemistry, chemical synthesis is purposeful execution of chemical reactions to get a product, or several products. This happens by physical and chemical manipulations usually involving one or more reactions. In modern laboratory usage, this tends to imply that the process is reproducible, reliable, and established to work in multiple tar. Fiberglass is sufficiently durable and workable, but has become unprofitable for large scale production.
- Silicon Silicon is the most common metalloid. It is a chemical element, which has the symbol Si and atomic number 14. A tetravalent metalloid, silicon is less reactive than its chemical analog carbon – More recently, many auto accessory manufacturers are using silicon-organic polymers. The main benefit of this material is its phenomenal plasticity. Silicon possesses extra high thermal characteristics and provides a longer product lifetime.
- Carbon Carbon is the chemical element with symbol C and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. There are three naturally occurring isotopes, with 12C and 13C being stable, while 14C is radioactive, decaying with a half-life of – fiberglass Fiberglass, , is material made from extremely fine fibers of glass. It is used as a reinforcing agent for many polymer products; the resulting composite material, properly known as fiber-reinforced polymer (FRP) or glass-reinforced plastic (GRP), is called "fiberglass" in popular usage. Glassmakers throughout history have experimented based on carbon fiber Carbon fiber , alternatively graphite fiber, carbon graphite or CF, is a material consisting of extremely thin fibers about 0.005–0.010 mm in diameter and composed mostly of carbon atoms. The carbon atoms are bonded together in microscopic crystals that are more or less aligned parallel to the long axis of the fiber. The crystal alignment makes is the youngest material on the automotive aftermarket. Carbon is light weight, durable, but also a very expensive material. Unlike ordinary fiberglass, solidification of the connecting tar takes place in a pressure chamber using high temperatures. Due to the very large amount of waste during the manufacturing process, large scale producers cannot widely use carbon fiber in automobile parts production currently.
Other vehicles
Heavy trucks, like long haul tractors A semi-trailer truck, also known as a semi, tractor-trailer, or articulated truck or articulated lorry, often abbreviated to artic, is an articulated vehicle consisting of a towing engine (tractor in the United States, prime mover in Australia, lorry in Ireland and truck in the UK, Canada and New Zealand), and a semi-trailer (plus possible, may also have a spoiler dome on the top of the cab in order to lessen drag caused from air resistance from the trailer it's towing, which may be taller than the cab and provide a very non-aerodynamic effect. These spoilers primarily increase fuel economy instead of improving handling, however.
Trains may use spoilers to induce drag (like an air brake). A new prototype Japanese high-speed train The Shinkansen , also known as the bullet train, is a network of high-speed railway lines in Japan operated by four Japan Railways Group companies. Starting with the 210 km/h (130 mph) Tōkaidō Shinkansen in 1964, the now 2,459 km (1,528 mi) long network has expanded to link most major cities on the islands of Honshū and Kyūshū at speeds up to, the Fastech 360 Fastech 360 is the name given to a pair of former experimental high-speed trains developed by East Japan Railway Company to test technology for the next-generation Shinkansen rolling stock. The name is a portmanteau of Fast, Technology, and 360 km/h (223 mph), the target operational speed for production trains based on the new technologies. Speeds is designed to reach speeds of 250 mph. Its nose is specifically designed to spoil a wind effect associated with passing through tunnels, and it can deploy 'ears' which act to slow the train in case of emergency by increasing its drag.
Some modern race cars employ a situational spoiler called a roof flap. These roof flaps deploy when the body of the car is rotated so it is traveling in reverse. The car will then generate lift instead of countering it. The roof flaps deploy because they are recessed into a pocket in the roof. The low pressure above this pocket will cause the flaps to deploy, and counteract some of the lift generated by the car.
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Related terms
- Diffuser A diffuser, in an automotive context, is a shaped section of the car underbody which improves the car's aerodynamic properties by enhancing the transition between the high-velocity airflow underneath the car and the much slower freestream airflow of the ambient atmosphere. It works by providing a space for the underbody airflow to decelerate and, which creates downforce Downforce is a downwards thrust created by the aerodynamic characteristics of a car. The purpose of downforce is to allow a car to travel faster through a corner by increasing the vertical force on the tires, thus creating more grip by accentuating a low pressure zone beneath a car.
- Wing (automotive) A wing in this context is an aerodynamic device intended to increase drag and/or generate down force on an automobile or provide aesthetics. The angle of attack of the wing on some cars can be adjusted to increase downward force over the rear wheels, but it has the dual result of increasing drag. The precise physics of the effects of these
- Aerofoil An airfoil or aerofoil (in British English) is the shape of a wing or blade (of a propeller, rotor or turbine) or sail as seen in cross-section
- Tail fin
Alle-Autos-In.De
Am Heck ist ein ausfahrbarer Spoiler installiert, der in zwei geschwindigkeitsabhaengigen Positionen einen optimalen Kompromiss zwischen Strassenlage und ...
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2008 Porsche 911 GT3 RS Passenger Rear Spoiler
