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Trailing Edge NACA 0012
Trailing can mean, among others: * Facing and trailing, in railroads * The act of using a Trailer (promotion) * Trailing wheel * Trailing arm * Trailing edge * Hound trailing * Trailing twelve months {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Facing And Trailing
Facing or trailing are railway railroad switch, 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. Diamond crossings Fixed diamond crossings (with no moving parts) count as trailing points in both directions, although in very exceptional circumstances such as propelling a train in reverse over fine angle diamond crossings they can derail wagons as they bunch up. Switched diamonds, which contain two stub turnouts in disguise, count as facing turnouts in both directions and are also known as moveable angles (UK). Moveable crossings Fixed V-crossings are trailable in both directions. Moveable crossings are effectively facing in both directions and must be correctly aligned. Stub switches Stub switches are effectively facing in both directions and must be c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad
Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in railway track, tracks, which usually consist of two parallel steel railway track, rails. Rail transport is one of the two primary means of land transport, next to road transport. It is used for about 8% of passenger and rail freight transport, freight transport globally, thanks to its Energy efficiency in transport, energy efficiency and potentially high-speed rail, high speed.Rolling stock on rails generally encounters lower friction, frictional resistance than rubber-tyred road vehicles, allowing rail cars to be coupled into longer trains. Power is usually provided by Diesel locomotive, diesel or Electric locomotive, electric locomotives. While railway transport is capital intensity, capital-intensive and less flexible than road transport, it can carry heavy loads of passengers and cargo with greater energy efficiency and safety. Precursors of railways driven by human or an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trailer (promotion)
A trailer (also known as a preview, coming attraction, or attraction video) is a short advertisement, originally designed for a feature film, which highlights key scenes of upcoming features intended to be exhibited in the future at a movie theater or 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, livestreaming 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 ... [...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 (rail transport), wheelset) located behind the driving wheels. The axle of the trailing wheels is usually located in a trailing Bogie, 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 su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trailing Arm
A trailing-arm suspension, also referred to as trailing-link, is a form of vehicle suspension. In a motor vehicle it places one or more horizontal arms (or "links") perpendicular to and forward of the axle on the chassis or unibody, which are connected to the axle or wheels with pivot joint(s). These are typically used on the rear axle or wheels of vehicles, but also found in both front and main landing gear of aircraft. A "semi trailing-arm" (or semi trailing-link) is a common form of independent rear suspension on automobiles, particularly those with front wheel drive (where it allows a flatter rear floor pan). 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 des ... [...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, elevator (aircraft), elevators on the tailplane controlling Aircraft principal axes, pitch, and the rudder on the fin controlling Aircraft principal axes, 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 surface. A sharp trailing edge is always employed in an airfoil. George Batchelor has written about: :“ ... the remarkable controlling influence exerted by the sharp trailing edge of an aerof ... [...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] |
