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Red Shrimp
Red Shrimp was an airborne high-bandwidth radar jammer fitted to the Vulcan and Victor. The name was one of the Rainbow Codes, its official name was ARI.18076, for Airborne Radio Installation. Red Shrimp was based on the carcinotron, a new type of vacuum tube introduced in 1953 by the French company Thomson-CSF. The carcinotron produced microwaves across a wide bandwidth and could be tuned as quickly as a single input voltage could be changed. They rapidly swept through all of the frequencies used by enemy radars, hitting their operational frequencies hundreds of times a second. These would be plotted on the radar's plan position indicator, filling it with so many "blips" that the bomber was invisible. Red Shrimp remained operational on the V-bomber fleet through its entire history. Although it was still operational during the Falklands War, it was considered obsolete and not used in combat. Operation Red Shrimp (or ARI 18076) was a wide-coverage jammer for radar between 2.5 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avro Vulcan At Duxford Airshow 2012 (7977146095)
AVRO, short for Algemene Vereniging Radio Omroep ("General Association of Radio Broadcasting"), was a Dutch public broadcasting association operating within the framework of the Nederlandse Publieke Omroep system. It was the first public broadcaster in the Netherlands. In 2014 AVRO merged with fellow broadcaster TROS to form AVROTROS. History On 8 July 1923, Hilversumsche Draadlooze Omroep was launched by the Nederlandsche Seintoestellen Fabriek (in English: Dutch Transmitter Factory) under supervision of Willem Vogt. On 21 July 1923, it provided the very first regular radio broadcast in the Netherlands. In 1927 it changed its name into Algemeene Nederlandsche Radio Omroep (ANRO), followed soon by a merger with Nederlandsche Omroep Vereeniging (NOV). On 28 December 1927, the two merged broadcasters continued as Algemeene Vereeniging Radio Omroep (A.V.R.O., in English: "General Association of Radio Broadcasting"). In 1938, AVRO sponsored what was the strongest chess tourname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:backward-wave Oscillator
A backward wave oscillator (BWO), also called carcinotron or backward wave tube, is a vacuum tube that is used to generate microwaves up to the terahertz range. Belonging to the traveling-wave tube family, it is an oscillator with a wide electronic tuning range. An electron gun generates an electron beam that interacts with a slow-wave structure. It sustains the oscillations by propagating a traveling wave backwards against the beam. The generated electromagnetic wave power has its group velocity directed oppositely to the direction of motion of the electrons. The output power is coupled out near the electron gun. It has two main subtypes, the M-type (M-BWO), the most powerful, and the O-type (O-BWO). The output power of the O-type is typically in the range of 1 mW at 1000 GHz to 50 mW at 200 GHz. Carcinotrons are used as powerful and stable microwave sources. Due to the good quality wavefront they produce (see below), they find use as illuminators in terah ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetron
The cavity magnetron is a high-power vacuum tube used in early radar systems and currently in microwave ovens and linear particle accelerators. It generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of cavity resonators, which are small, open cavities in a metal block. Electrons pass by the cavities and cause microwaves to oscillate within, similar to the functioning of a whistle producing a tone when excited by an air stream blown past its opening. The resonant frequency of the arrangement is determined by the cavities' physical dimensions. Unlike other vacuum tubes, such as a klystron or a traveling-wave tube (TWT), the magnetron cannot function as an amplifier for increasing the intensity of an applied microwave signal; the magnetron serves solely as an oscillator, generating a microwave signal from direct current electricity supplied to the vacuum tube. The use of magnetic fields as a means to control the flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quick Reaction Alert
Quick Reaction Alert (QRA) is state of readiness and '' modus operandi'' of air defence maintained at all hours of the day by NATO air forces. The United States usually refers to Quick Reaction Alert as 'Airspace Control Alert'. Some non-NATO countries also maintain QRA, either full-time or part-time. Operation QRA in the United Kingdom Pilots and engineers on QRA duty are at immediate readiness twenty-four hours a day fully dressed in the Crew Ready Room, which are next to the hangars (a hardened aircraft shelter known informally as ''Q-sheds'') which houses the interceptor aircraft, since 2007 the Eurofighter Typhoon. Pilots are on QRA duty around once or twice a month, each a twenty-four-hour shift. Engineers are on QRA duty three or four times a year, each for a twenty-four-hour a day shift for seven days at a time. Two Typhoon aircraft are on duty, along with a Voyager tanker at RAF Brize Norton in Oxfordshire; before 2014 this was carried out by a TriStar. Civili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:RAF Watton
Royal Air Force Watton or more simply RAF Watton is a former Royal Air Force station located southwest of East Dereham, Norfolk, England. Opened in 1937 it was used by both the Royal Air Force (RAF) and United States Army Air Forces (USAAF) during the Second World War. During the war it was used primarily as a bomber airfield, being the home of RAF Bomber Command squadrons until being used by the United States Army Air Forces Eighth Air Force as a major overhaul depot for Consolidated B-24 Liberator bombers and as a weather reconnaissance base. After the war, it was returned to RAF use until being turned over to the British Army in the early 1990s. It was closed then put up for sale. History RAF Bomber Command use RAF Watton was a permanent RAF station built by John Laing & Son in 1937, and first used as a light bomber airfield housing for varying periods by RAF Bomber Command. The following squadrons and units were based at Watton at some point during this time: * No ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:No
No or NO may refer to: English language * ''Yes'' and ''no'' (responses) * A determiner in noun phrases Alphanumeric symbols * No (kana), a letter/syllable in Japanese script * No symbol, displayed 🚫 * Numero sign, a typographic symbol for the word 'number', also represented as "No." or similar variants Geography * Niederösterreich (Lower Austria), abbreviated ''NÖ'' * Norway (ISO 3166-1 country code NO) ** Norwegian language (ISO 639-1 code "no") ** .no, the internet ccTLD for Norway * No, Denmark, a village in Denmark * Nō, Niigata, a former town in Japan * No Creek (other), any of several streams * Lake No, in South Sudan * New Orleans, Louisiana or its professional sports teams: ** New Orleans Saints of the National Football League ** New Orleans Pelicans of the National Basketball Association Arts and entertainment Film and television * ''No'' (2012 film), a 2012 Chilean film * ''Nô'' (film), a 1998 Canadian film * Julius No, the titular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:Electronic Counter-Measures
An electronic countermeasure (ECM) is an electrical or electronic device designed to trick or deceive radar, sonar, or other detection systems, like infrared (IR) or lasers. It may be used both offensively and defensively to deny targeting information to an enemy. The system may make many separate targets appear to the enemy, or make the real target appear to disappear or move about randomly. It is used effectively to protect aircraft from guided missiles. Most air forces use ECM to protect their aircraft from attack. It has also been deployed by military ships and recently on some advanced tanks to fool laser/IR guided missiles. It is frequently coupled with stealth advances so that the ECM systems have an easier job. Offensive ECM often takes the form of jamming. Self-protecting (defensive) ECM includes using blip enhancement and jamming of missile terminal homers. History The first example of electronic countermeasures being applied in a combat situation took place d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:Bomber Command Development Unit
A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an aircraft occurred in the Italo-Turkish War, with the first major deployments coming in the First World War and Second World War by all major airforces causing devastating damage to cities, towns, and rural areas. The first purpose built bombers were the Italian Caproni Ca 30 and British Bristol T.B.8, both of 1913. Some bombers were decorated with nose art or victory markings. There are two major classifications of bomber: strategic and tactical. Strategic bombing is done by heavy bombers primarily designed for long-range bombing missions against strategic targets to diminish the enemy's ability to wage war by limiting access to resources through crippling infrastructure or reducing industrial output. Tactical bombing is aimed at counteri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:Vickers Valiant
The Vickers Valiant was a British high-altitude jet bomber designed to carry nuclear weapons, and in the 1950s and 1960s was part of the Royal Air Force's "V bomber" strategic deterrent force. It was developed by Vickers-Armstrongs in response to Specification B.35/46 issued by the Air Ministry for a nuclear-armed jet-powered bomber. The Valiant was the first of the V bombers to become operational, and was followed by the Handley Page Victor and the Avro Vulcan. The Valiant is the only V bomber to have dropped live nuclear weapons (for test purposes).Blackman and Wright 2015, p. 33. In 1956, Valiants operating from Malta flew conventional bombing missions over Egypt for Operation Musketeer during the Suez Crisis. From 1956 until early 1966 the main Valiant force was used in the nuclear deterrence role in the confrontation between NATO and the Warsaw Pact powers. Other squadrons undertook aerial refuelling, aerial reconnaissance and Electronic Warfare. In 1962, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Warning Radar
An early-warning radar is any radar system used primarily for the long-range detection of its targets, i.e., allowing defences to be alerted as ''early'' as possible before the intruder reaches its target, giving the air defences the maximum time in which to operate. This contrasts with systems used primarily for tracking or gun laying, which tend to offer shorter ranges but offer much higher accuracy. EW radars tend to share a number of design features that improve their performance in the role. For instance, EW radar typically operates at lower frequencies, and thus longer wavelengths, than other types. This greatly reduces their interaction with rain and snow in the air, and therefore improves their performance in the long-range role where their coverage area will often include precipitation. This also has the side-effect of lowering their optical resolution, but this is not important in this role. Likewise, EW radars often use much lower pulse repetition frequency to maximi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:Knife Rest , NATO reporting names "Knife Rest B" and "Knife Rest C"
{{Disambiguation ...
A knife rest is a piece of kitchenware. Knife rest may also refer to: * P-8 radar, NATO reporting name "Knife Rest A" * P-10 radar The "Pegmantit 10" or P-10 (also referred to by the NATO reporting name "Knife Rest B" in the west) was an early 2D VHF radar developed and operated by the former Soviet Union. Development The "Pegmantit 10", which is abbreviated to P-10, was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:en:Blue Diver
Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the optical spectrum, spectrum of visible light. The term ''blue'' generally describes colors perceived by humans observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; Azure (color), azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering#Cause of the blue colour of the sky, Rayleigh scattering. An optical effect called the Tyndall effect explains Eye color#Blue, blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in anc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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