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Trailing Edge NACA 0012
Trailing can mean, among others: * Facing and trailing, in railroads * The act f using a Trailer (promotion) * Trailing wheel * Trailing arm * Trailing edge * Hound trailing Hound trailing, or hound racing, is a dog sport that uses specially bred hounds to race along an artificially laid scent trail over a cross country course. Description Hound trailing is a race between hounds along an artificially laid scent tra ... * Trailing twelve months {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Facing And Trailing
Facing or trailing are railway turnouts (or 'points' in the UK) in respect to whether they are divergent or convergent. When a train traverses a turnout in a facing direction, it may diverge onto either of the two routes. When travelled in a trailing direction, the two routes converge onto each other. History In the early history of railways in Britain, when signalling and interlocking were primitive, and staff were inexperienced, facing turnouts were a hazard, because a train travelling at high speed could be accidentally switched into a slow speed divergence or dead end. Facing turnouts were therefore banned, except when absolutely necessary. However, facing turnouts cannot be avoided where there are crossing loops on single lines. With the widespread availability of electrically interlocked signalling in modern times, the rule against facing turnouts has been relaxed. Diamond crossings Fixed diamond crossings (with no moving parts) count as trailing points in both direc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad
Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on sleepers (ties) set in ballast, on which the rolling stock, usually fitted with metal wheels, moves. Other variations are also possible, such as "slab track", in which the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system generally encounters lower frictional resistance than rubber-tyred road vehicles, so passenger and freight cars (carriages and wagons) can be coupled into longer trains. The operation is carried out by a railway company, providing transport between train stations or freight customer faci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trailer (promotion)
A trailer (also known as a preview, coming attraction or attraction video) is a commercial advertisement, originally for a feature film that is going to be exhibited in the future at a movie theater/cinema. It is a product of creative and technical work. Movie trailers have now become popular on DVDs and Blu-ray discs, as well as on the Internet and mobile devices. Of some 10 billion videos watched online annually, film trailers rank third, after news and user-created video. The trailer format has been adopted as a promotional tool for television shows, video games, books, and theatrical events/concerts. History The first trailer shown in an American film theater was in November 1913, when Nils Granlund, the advertising manager for the Marcus Loew theater chain, produced a short promotional film for the musical ''The Pleasure Seekers'', opening at the Winter Garden Theatre on Broadway. As reported in a wire service story carried by the Lincoln, Nebraska ''Daily Star' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trailing Wheel
On a steam locomotive, a trailing wheel or trailing axle is generally an unpowered wheel or axle ( wheelset) located behind the driving wheels. The axle of the trailing wheels is usually located in a trailing truck. On some large locomotives, a booster engine was mounted on the trailing truck to provide extra tractive effort when starting a heavy train and at low speeds on gradients. Trailing wheels were used in some early locomotives but fell out of favor for a time during the latter 19th century. As demand for more powerful locomotives increased, trailing wheels began to be used to support the crew cab and rear firebox area. Trailing wheels first appeared on American locomotives between 1890 and 1895, but their axle worked in rigid pedestals. It enabled boilers to be lowered, since the top of the main frames was dropped down behind the driving wheels and under the firebox. The firebox could also be longer and wider, increasing the heating surface area and steam generation c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trailing Arm
A (semi) trailing-arm suspension, sometimes referred to as (semi) trailing-link is a vehicle axle or wheel suspension design in which one or more horizontal arms (or "links"), perpendicular to and forward of the axle, are connecting the axle or wheels with pivot joint(s) ahead of them, on the structure ( unibody or chassis) of a motor vehicle. These are typically used on the rear axle or wheels of a vehicle, but also found in aircraft landing gear. Leading arms are similar horizontal arms, perpendicular to the axle, but connecting the wheels to the vehicle structure via pivot joints ''to the rear'' of them. These are typically used on the front axle or wheels, as on the Citroën 2CV and its derivatives, and on the Citroën DS, as well as on the M422 Mighty Mite jeep. Types Trailing-arm Trailing-arm designs in live axle setups often use just two or three links and a Panhard rod A Panhard rod (also called Panhard bar, track bar, or track rod) is a suspension link tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trailing Edge
The trailing edge of an aerodynamic surface such as a wing is its rear edge, where the airflow separated by the leading edge meets.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 521. Aviation Supplies & Academics, 1997. Essential flight control surfaces are attached here to control the direction of the departing air flow, and exert a controlling force on the aircraft. Such control surfaces include ailerons on the wings for roll control, elevators on the tailplane controlling pitch, and the rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other vehicle that moves through a fluid medium (generally air or water). On an aircraft the rudder is used primarily to counter adve ... on the fin controlling yaw. Elevators and ailerons may be combined as elevons on tailless aircraft. The shape of the trailing edge is of prime importance in the aerodynamic function of any aerodynamic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hound Trailing
Hound trailing, or hound racing, is a dog sport that uses specially bred hounds to race along an artificially laid scent trail over a cross country course. Description Hound trailing is a race between hounds along an artificially laid scent trail. The sport is a combination of drag hunting, dog racing and steeplechasing, with the hounds taking the place of horses. The hounds follow a man-laid scent, the scent trail being usually laid by dragging a piece of fabric, slightly soaked with a combination of aniseed and paraffin oil, along the course. Trail hounds over 2 years old race in adult races, whilst those between 1 year old and 2 years old race in puppy races. Adult races are approximately long and the hounds in the adult races typically take 30 minutes to finish; times outside 25 and 45 minutes are declared void. Puppy races are approximately long. When racing, the hounds' coats are closely shaved to prevent them from overheating during the race. Unlike in other forms of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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