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Electromagnetic Aircraft Launch System
The Electromagnetic Aircraft Launch System (EMALS) is a type of electromagnetic catapult system developed by General Atomics for the United States Navy. The system launches carrier-based aircraft by means of a catapult employing a linear induction motor rather than the conventional steam piston, providing greater precision and faster recharge compared to steam. EMALS was first installed on the lead ship of the , USS ''Gerald R. Ford'', c. 2015. Its main advantage is that it accelerates aircraft more smoothly, putting less stress on their airframes. Compared to steam catapults, the EMALS also weighs less, is expected to cost less and require less maintenance, and can launch both heavier and lighter aircraft than a steam piston-driven system. It also reduces the carrier's requirement of fresh water, thus reducing the demand for energy-intensive desalination. Design and development Developed in the 1950s, steam catapults have proven exceptionally reliable. Carriers equipped ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alternating Current
Alternating current (AC) is an electric current that periodically reverses direction and changes its magnitude continuously with time, in contrast to direct current (DC), which flows only in one direction. Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, Fan (machine), fans and electric lamps into a wall socket. The abbreviations ''AC'' and ''DC'' are often used to mean simply ''alternating'' and ''direct'', respectively, as when they modify ''Electric current, current'' or ''voltage''. The usual waveform of alternating current in most electric power circuits is a sine wave, whose positive half-period corresponds with positive direction of the current and vice versa (the full period is called a ''wave cycle, cycle''). "Alternating current" most commonly refers to power distribution, but a wide range of other appl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AirForces Monthly
''Air Forces Monthly'' (AFM) is a military aviation magazine published by Key Publishing Ltd, based at Stamford in the English county of Lincolnshire in the United Kingdom. Established in 1988, the magazine provides news and analysis on military aviation, technology, and related topics. ''The Independent'' newspaper claims that "Air Forces Monthly is widely read in the MoD and in the defence industry, both in Britain and in the US". In 1997, an AFM report that a military aircraft crash during takeoff at Boscombe Down on 26 September 1994 involved a classified Aurora aircraft prompted denials from the Ministry of Defence and the United States Defense Department. Sister publications from Key Publishing include ''Air International'', '' Air Enthusiast'', ''Airliner World'', and ''FlyPast ''FlyPast'' is an aircraft magazine, published monthly, edited by Tom Allett, Steve Beebee and Jamie Ewan. History and profile The magazine started as a bi-monthly edition in May/Ju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing F/A-18E/F Super Hornet
The Boeing F/A-18E and F/A-18F Super Hornet are a series of American supersonic twinjet, twin-engine, Carrier-based aircraft, carrier-capable, Multirole combat aircraft, multirole fighter aircraft derived from the McDonnell Douglas F/A-18 Hornet. The Super Hornet is in service with the armed forces of the United States, Australia, and Kuwait. The F/A-18E single-seat and F tandem-seat variants are larger and more advanced versions of the F/A-18C and D Hornet, respectively. A strike fighter capable of air-to-air and air-to-ground/surface missions, the Super Hornet has an internal 20mm M61 Vulcan, M61A2 rotary cannon and can carry air-to-air missiles, air-to-surface missiles, and a variety of other weapons. Additional fuel can be carried in up to five external fuel tanks and the aircraft can be configured as an airborne tanker by adding an external Aerial refueling, air-to-air refueling system. Designed and initially produced by McDonnell Douglas, the Super Hornet first flew in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grumman C-2 Greyhound
The Grumman C-2 Greyhound is a twin-engine, high-wing cargo aircraft designed to carry supplies, mail, and passengers to and from aircraft carriers of the United States Navy. Its primary mission is carrier onboard delivery (COD). The aircraft provides critical logistics support to carrier strike groups. The aircraft is mainly used to transport high-priority cargo such as jet engines and special stores, mail, and passengers between carriers and shore bases. Prototype C-2s first flew in 1964, and production followed the next year. The initial Greyhound aircraft were overhauled in 1973. In 1984, more C-2As were ordered under designation Reprocured C-2A or C-2A(R). In 2010, all C-2A(R) aircraft received updated propellers (from four to eight blades) and navigational updates (glass cockpit). The U.S. Navy is to start replacing the remaining 27 C-2As with 38 Bell Boeing CMV-22Bs Osprey tiltrotors in 2020, with full fielding in 2028. Design and development Origins The C-2 Greyhound, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McDonnell Douglas T-45 Goshawk
The McDonnell Douglas (now Boeing) T-45 Goshawk is a highly modified version of the British BAE Systems Hawk land-based training jet aircraft. Manufactured by McDonnell Douglas (now Boeing) and British Aerospace (now BAE Systems), the T-45 is used by the United States Navy as an aircraft carrier-capable trainer. Development Background The T-45 Goshawk has its origins in the mid-1970s, during which time the U.S. Navy formally commenced its search for a new jet trainer aircraft to serve as a single replacement for both its T-2 Buckeye and TA-4 Skyhawk trainers. During 1978, the VTXTS advanced trainer program to meet this need was formally launched by the U.S. Navy. An Anglo- American team, comprising British aviation manufacturer British Aerospace (BAe) and American aircraft company McDonnell Douglas (MDC), decided to submit their proposal for a navalised version of BAe's land-based Hawk trainer. Other manufacturers also submitted bids, such as a rival team of French aircraft c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lakehurst Maxfield Field
Lakehurst Maxfield Field, formerly known as Naval Air Engineering Station Lakehurst (NAES Lakehurst), is the United States Navy, naval component of Joint Base McGuire–Dix–Lakehurst (JB MDL), a United States Air Force-managed joint base. The airfield is approximately 25 mi (40 km) east-southeast of Trenton, New Jersey, Trenton in Manchester Township, New Jersey, Manchester Township and Jackson Township, New Jersey, Jackson Township in Ocean County, New Jersey, United States. It is primarily the home to Naval Air Warfare Center Aircraft Division, Naval Air Warfare Center Aircraft Division Lakehurst, although the airfield supports several other flying and non-flying units as well. Its name is an Amalgamation (names), amalgamation of its location and the last name of Commander Louis H. Maxfield, who lost his life when the R38-class airship, R-38/USN ZR-2 airship crashed during flight on 24 August 1921 near Kingston upon Hull, Hull, England. When it was consolidated with McGuire Air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Navy 101218-N-0000X-002 An F-A-18E Super Hornet Is Launched During A Test Of The Electromagnetic Aircraft Launch System (EMALS) At Naval Air Sys
US or Us most often refers to: * ''Us'' (pronoun), the objective case of the English first-person plural pronoun ''we'' * US, an abbreviation for the United States US, U.S., Us, us, or u.s. may also refer to: Arts and entertainment Albums * ''Us'' (Brother Ali album) or the title song, 2009 * ''Us'' (Empress Of album), 2018 * ''Us'' (Mull Historical Society album), 2003 * ''Us'' (Peter Gabriel album), 1992 * ''Us'' (EP), by Moon Jong-up, 2021 * ''Us'', by Maceo Parker, 1974 * ''Us'', mini-album by Peakboy, 2019 Songs * "Us" (James Bay song), 2018 * "Us" (Jennifer Lopez song), 2018 * "Us" (Regina Spektor song), 2004 * "Us" (Gracie Abrams song), 2024 * "Us", by Azealia Banks from '' Fantasea'', 2012 * "Us", by Celine Dion from ''Let's Talk About Love'', 1997 * "Us", by Gucci Mane from ''Delusions of Grandeur'', 2019 * "Us", by Spoon from '' Hot Thoughts'', 2017 Other media * US Festival, two 1980s California music festivals organized by Steve Wozniak * ''Us'' (1991 f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hall-effect Sensor
A Hall effect sensor (also known as a Hall sensor or Hall probe) is any sensor incorporating one or more Hall elements, each of which produces a voltage proportional to one axial component of the magnetic field vector using the Hall effect (named for physicist Edwin Hall). Hall sensors are used for proximity sensing, positioning, speed detection, and current sensing applications and are common in industrial and consumer applications. Hundreds of millions of Hall sensor integrated circuits (ICs) are sold each year by about 50 manufacturers, with the global market around a billion dollars. Principles In a Hall sensor, a fixed DC bias current is applied along one axis across a thin strip of metal called the Hall element transducer. Sensing electrodes on opposite sides of the Hall element along ''another'' axis measure the difference in electric potential (voltage) across the axis of the electrodes. The current's charge carriers are deflected by the Lorentz force in the pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycloconverter
A cycloconverter (CCV) or a cycloinverter converts a constant amplitude, constant frequency Alternating current, AC waveform to another AC waveform of a lower frequency by synthesizing the output waveform from segments of the AC supply without an intermediate DC link ( and ). There are two main types of CCVs, circulating current type and blocking mode type, most commercial high power products being of the blocking mode type. Characteristics Whereas phase-controlled semiconductor controlled rectifier devices (SCR) can be used throughout the range of CCVs, low cost, low-power TRIAC-based CCVs are inherently reserved for resistive load applications. The amplitude and frequency of converters' output voltage are both variable. The output to input frequency ratio of a three-phase CCV must be less than about one-third for circulating current mode CCVs or one-half for blocking mode CCVs.Bose (2006), p. 153 Output waveform quality improves as the ''pulse number'' of switching-device bridg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gasoline Gallon Equivalent
Gasoline gallon equivalent (GGE) or gasoline-equivalent gallon (GEG) is the amount of an alternative fuel it takes to equal the energy content of one liquid gallon of gasoline. GGE allows consumers to compare the energy content of competing fuels against a commonly known fuel, namely gasoline. It is difficult to compare the cost of gasoline with other fuels if they are sold in different units and physical forms. GGE attempts to solve this. One GGE of CNG and one GGE of electricity have exactly the same energy content as one gallon of gasoline. In this way, GGE provides a direct comparison of gasoline with alternative fuels, including those sold as a gas (natural gas, propane, hydrogen) and as metered electricity. Definition In 1994, the US National Institute of Standards and Technology (NIST) defined "gasoline gallon equivalent (GGE) s5.660 pounds of natural gas." Compressed natural gas (CNG), for example, is a gas rather than a liquid. It can be measured by its volume in sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alternator
An alternator (or synchronous generator) is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current. For reasons of cost and simplicity, most alternators use a rotating magnetic field with a stationary armature.Gordon R. Selmon, ''Magnetoelectric Devices'', John Wiley and Sons, 1966 no ISBN pp. 391-393 Occasionally, a linear alternator or a rotating armature with a stationary magnetic field is used. In principle, any AC electrical generator can be called an alternator, but usually, the term refers to small rotating machines driven by automotive and other internal combustion engines. An alternator that uses a permanent magnet for its magnetic field is called a magneto. Alternators in power stations driven by steam turbines are called turbo-alternators. Large 50 or 60 Hz three-phase alternators in power plants generate most of the world's electric power, which is distributed by electric power grids. History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
