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F Class (other)
Class F or F class may refer to: * NZR F class, steam locomotives used in New Zealand * Class F, a stellar classification * Class F, a type of race car sometimes referred to as F-P as well, for F-Production * Class F, an airspace class defined by the ICAO * Class F, a designation for model aircraft defined by the Fédération Aéronautique Internationale * F Class or CIE 501 Class, a narrow gauge diesel locomotive used on the former West Clare Railway in Ireland * F-Class (shooting sport), a high power rifle discipline * F-class escort ship, ships used by the Kriegsmarine during the Second World War * F-class destroyer (other), several classes of ships * F-class submarine (other), several classes of submarines * Class F cable, a telecommunications cable * Class F fire, a class used for fire extinguishers * Class F fly ash * F-segment The F-segment is the 6th category and largest of the European segments for passenger cars, and always belongs to "luxury ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stellar Classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element or molecule, with the line strength indicating the abundance of that element. The strengths of the different spectral lines vary mainly due to the temperature of the photosphere, although in some cases there are true abundance differences. The ''spectral class'' of a star is a short code primarily summarizing the ionization state, giving an objective measure of the photosphere's temperature. Most stars are currently classified under the Morgan–Keenan (MK) system using the letters ''O'', ''B'', ''A'', ''F'', ''G'', ''K'', and ''M'', a sequence from the hottest (''O'' type) to the coolest (''M'' type). Each letter class is then subdivi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Race Car
Auto racing (also known as car racing, motor racing, or automobile racing) is a motorsport involving the racing of automobiles for competition. Auto racing has existed since the invention of the automobile. Races of various sorts were organised, with the first recorded as early as 1867. Many of the earliest events were effectively reliability trials, aimed at proving these new machines were a practical mode of transport, but soon became an important way for automobile makers to demonstrate their machines. By the 1930s, specialist racing cars had developed. There are now numerous different categories, each with different rules and regulations. History The first prearranged match race of two self-powered road vehicles over a prescribed route occurred at 4:30 A.M. on August 30, 1867, between Ashton-under-Lyne and Old Trafford, a distance of eight miles. It was won by the carriage of Isaac Watt Boulton. Internal combustion auto racing events began soon after the construct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airspace Class
The world's navigable airspace is divided into three-dimensional segments, each of which is assigned to a specific class. Most nations adhere to the classification specified by the International Civil Aviation Organization (ICAO) and described below, though they might use only some of the classes defined below, and significantly alter the exact rules and requirements. Similarly, individual nations may also designate special use airspace (SUA) with further rules for reasons of national security or safety. Abbreviations used in this article ICAO definitions On March 12, 1990, ICAO adopted the current airspace classification scheme. The classes are fundamentally defined in terms of flight rules and interactions between aircraft and air traffic control (ATC). Generally speaking, the ICAO airspaces allocate the responsibility for avoiding other aircraft, namely either to ATC (if separation is provided) or to the aircraft commander (if not). Some key concepts are: * Separation: M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fédération Aéronautique Internationale
The (; FAI; en, World Air Sports Federation) is the world governing body for air sports, and also stewards definitions regarding human spaceflight. It was founded on 14 October 1905, and is headquartered in Lausanne, Switzerland. It maintains world records for aeronautical activities, including ballooning, aeromodeling, and unmanned aerial vehicles (drones), as well as flights into space. History The FAI was founded at a conference held in Paris 12–14 October 1905, which was organized following a resolution passed by the Olympic Congress held in Brussels on 10 June 1905 calling for the creation of an Association "to regulate the sport of flying, ... the various aviation meetings and advance the science and sport of Aeronautics." The conference was attended by representatives from 8 countries: Belgium (Aero Club Royal de Belgique, founded 1901), France ( Aéro-Club de France, 1898), Germany ( Deutscher Aero Club e.V.), Great Britain ( Royal Aero Club, 1901), Italy (Aero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CIE 501 Class
The CIE 501 Class locomotives were built in 1955 by Walker Brothers of Wigan for use on the narrow gauge () lines on the West Clare section of the CIÉ. They were small diesel mechanical locomotives, with a 0-4-0+0-4-0 wheel arrangement. Controlled from a central cab, the locomotives had two Gardner engines of , one under each end casing, driving through a fluid coupling and Wilson gear box the inner axle of the opposite bogie, through a spiral-bevel-reverse and reduction gear box. Unusually the locomotives were driven from a seat mounted sideways to the direction of travel giving a clear field of vision both ways by a mere turn of the head. The locomotives were fitted with vacuum brakes, emergency braking coming from a "deadman's" pedal, one at the driving position and two others, one mounted on each side of the cab. When used on freight services their maximum speed was , but with an overdrive fitted, released by a key, this was raised to for passenger trains. History The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
F-Class (shooting Sport)
The International Confederation of Fullbore Rifle Associations (ICFRA) is the international association for the fullbore rifle shooting sports of Target Rifle ('TR') (in the US 'Palma' Rifle) and F-Class, which are long range competitions shot at distances between 300 and 900 meters or 300 to 1,000 yards depending on the range. F-Class shooters often shoot concurrently with the world's long-range TR shooters and use the same targets, except that the F-Class target has an extra ring half the diameter of the smallest in use for TR. ICFRA manages the programme of World Championships and other major matches for Fullbore Rifle and seeks to standardize the competition rules for TR and F-Class around the world. In competitions, wind reading skills are important. In order to hit their targets competitors must sense wind direction and speed and adjust their sights accordingly by applying knowledge and experience about wind's effect on the Trajectory of the bullet. World Long-Range Rifle T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
F-class Escort Ship
The F-class escort ships were a class of fleet escorts () used by the German Navy ('' Kriegsmarine'') during the Second World War. Ten ships were built in total to fulfil a multi-purpose role. They were the only ships of this type of built by the ''Kriegsmarine''. The ships were not given names, but were designated ''F1'' through ''F10''. Construction The ships were built by Germaniawerft (F 1 – F 6), Kiel, Blohm & Voss (F 7, F 8) and Wilhelmshaven dockyard (F 9, F 10). They entered service between 1936 and 1939. Similar in size to the Type 35 and Type 37 torpedo-boats, the ships were originally conceived as fast fleet or convoy escort ships that could also perform anti-submarine and minesweeping work. They were also used as a testbed class for a new high-pressure steam power plant intended for use in future destroyers. As a class, they were overloaded and over-engined, which contributed to severe hull stress and very poor sea-keeping characte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
F-class Destroyer (other)
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F-class destroyer may refer to: * Tribal-class destroyer (1905), twelve ships for the Royal Navy that served in World War I * F-class destroyer (1934), nine ships for the Royal Navy that served in World War II See also * F class (other) Class F or F class may refer to: * NZR F class, steam locomotives used in New Zealand * Class F, a stellar classification * Class F, a type of race car sometimes referred to as F-P as well, for F-Production * Class F, an airspace class defined ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
F-class Submarine (other)
F-class submarine may refer to: * British F-class submarine, three submarines of the Royal Navy, built between 1913 and 1916 * Italian F-class submarine, 21 submarines of the Royal Italian Navy and three of the Royal Spanish Navy, built between 1915 and 1918 * United States F-class submarine The F-class submarines were a group of four submarines designed for the United States Navy by Electric Boat in 1909. ''F-1'' and ''F-2'' were built by Union Iron Works in San Francisco, while ''F-3'' and ''F-4'' were built by The Moran Company ..., four submarines of the United States Navy built in 1909 * Type F submarine, five submarines of the Imperial Japanese Navy built between 1917 and 1922 {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class F Cable
International standard ISO/IEC 11801 ''Information technology — Generic cabling for customer premises'' specifies general-purpose telecommunication cabling systems (structured cabling) that are suitable for a wide range of applications (analog and ISDN telephony, various data communication standards, building control systems, factory automation). It is published by ISO/IEC JTC 1/ SC 25/WG 3 of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It covers both balanced copper cabling and optical fibre cabling. The standard was designed for use within commercial premises that may consist of either a single building or of multiple buildings on a campus. It was optimized for premises that span up to 3 km, up to 1 km2 office space, with between 50 and 50,000 persons, but can also be applied for installations outside this range. A major revision was released in November 2017, unifying requirements for commercial, h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Class F Fire
A fire class is a system of categorizing fire with regard to the type of material and fuel for combustion. Class letters are often assigned to the different types of fire, but these differ between territories. There are separate standards for the United States, Europe, and Australia. This is used to determine the type of extinguishing agent that can be used for that fire class. Class A: Ordinary combustibles Class A fires consist of ordinary combustibles such as wood, paper, fabric, and most kinds of trash. They may be extinguished by water, wet chemical suppression, or dry chemical powder. Class B: Flammable liquid Class B fires are those where the fuel is flammable or combustible liquid. The US system includes flammable gases in their "Class B". In the European/Australian system, flammable liquids are designated "Class B" having flash point less than . These fires follow the same basic fire tetrahedron (heat, fuel, oxygen, chemical reaction) as ordinary combustibl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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