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AI Mark IV Radar
Radar, Airborne Interception, Mark IV (AI Mk. IV), produced by USA as SCR-540, was the world's first operational air-to-air radar system. Early Mk. III units appeared in July 1940 on converted Bristol Blenheim light bombers, while the definitive Mk. IV reached widespread availability on the Bristol Beaufighter heavy fighter by early 1941. On the Beaufighter, the Mk. IV arguably played a role in ending the Blitz, the ''Luftwaffe's'' night bombing campaign of late 1940 and early 1941. Early development was prompted by a 1936 memo of Henry Tizard on the topic of night fighting. The memo was sent to Robert Watt, director of the radar research efforts, who agreed to allow physicist Edward George "Taffy" Bowen to form a team to study the problem of air interception. The team had a test bed system in flights later that year, but progress was delayed for four years by emergency relocations, three abandoned production designs, and Bowen's increasingly adversarial relationship with W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Patrick Green
Charles Patrick Green (30 March 1914 – 10 March 1999) was a South African-born British Royal Air Force (RAF) fighter pilot during World War II who was credited with eleven confirmed kills and another three probable. Most of these were during night missions, including seven over a period of three nights in June 1943, actions for which he received numerous awards. Green was also a member of the British bobsleigh team in the mid-1930s, winning several medals including World Cup gold and Olympic bronze. Early life Green was born in Pietermaritzburg, South Africa on 30 March 1914, the son of Major Charles Henry Green and Ruth Graham Parry. His father was killed in action in East Africa Protectorate, British East Africa in November 1917. His mother re-married, which led to Green travelling Europe before being sent to Harrow School from 1927 to 1932. A natural athlete, he set the Harrow record for Hurdling, hurdles that lasted 40 years. After Harrow he moved to Trinity Colle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavity 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 f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hugh Dowding
Air Chief Marshal Hugh Caswall Tremenheere Dowding, 1st Baron Dowding, (24 April 1882 – 15 February 1970) was an officer in the Royal Air Force. He was Air Officer Commanding RAF Fighter Command during the Battle of Britain and is generally credited with playing a crucial role in Britain's defence, and hence, the defeat of Adolf Hitler's plan to invade Britain. Born in Moffat, Scotland, Dowding was an officer in the British Army in the 1900s and early 1910s. He joined the Royal Flying Corps at the start of the First World War and went on to serve as a fighter pilot and then as commanding officer of No. 16 Squadron. During the inter-war years he became Air Officer Commanding Fighting Area, Air Defence of Great Britain and then joined the Air Council as Air Member for Supply and Research. In July 1936, Dowding was appointed chief of the newly created RAF Fighter Command. During the Battle of Britain in the Second World War, Dowding's Fighter Command successfully defended the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAF Biggin Hill
London Biggin Hill Airport is an operational general aviation airport at Biggin Hill in the London Borough of Bromley, located south-southeast of Central London. The airport was formerly a Royal Air Force station RAF Biggin Hill, and a small enclave on the airport still retains that designation. Biggin Hill is best known for its role during the Battle of Britain in the Second World War, when it served as one of the principal fighter bases protecting London and South East England from attack by German Luftwaffe bombers. Over the course of the war, fighters based at Biggin Hill claimed 1,400 enemy aircraft, at the cost of the lives of 453 Biggin Hill based aircrew. The airport has a CAA Ordinary Licence (Number P804) that allows flights for the public transport of passengers or for flying instruction as authorised by the licensee (Regional Airports Limited). It specialises in general aviation, handling a spectrum of traffic from private aviation to large business jets. It c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chain Home
Chain Home, or CH for short, was the codename for the ring of coastal Early Warning radar stations built by the Royal Air Force (RAF) before and during the Second World War to detect and track aircraft. Initially known as RDF, and given the official name Air Ministry Experimental Station Type 1 (AMES Type 1) in 1940, the radar units themselves were also known as Chain Home for most of their life. Chain Home was the first early warning radar network in the world, and the first military radar system to reach operational status. Its effect on the outcome of the war made it one of the most powerful weapons of what is today known as the "Wizard War". In late 1934, the Tizard Committee asked radio expert Robert Watson-Watt to comment on the repeated claims of radio death rays and reports suggesting Germany had built some sort of radio weapon. His assistant, Arnold Wilkins, demonstrated that a death ray was impossible but suggested radio could be used for long-range detection. In Febr ... [...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] |
Suffolk
Suffolk () is a ceremonial county of England in East Anglia. It borders Norfolk to the north, Cambridgeshire to the west and Essex to the south; the North Sea lies to the east. The county town is Ipswich; other important towns include Lowestoft, Bury St Edmunds, Newmarket, and Felixstowe which has one of the largest container ports in Europe. The county is low-lying but can be quite hilly, especially towards the west. It is also known for its extensive farming and has largely arable land with the wetlands of the Broads in the north. The Suffolk Coast & Heaths and Dedham Vale are both nationally designated Areas of Outstanding Natural Beauty. History Administration The Anglo-Saxon settlement of Suffolk, and East Anglia generally, occurred on a large scale, possibly following a period of depopulation by the previous inhabitants, the Romanised descendants of the Iceni. By the fifth century, they had established control of the region. The Anglo-Saxon inhabitants later b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bawdsey Manor
Bawdsey Manor stands at a prominent position at the mouth of the River Deben close to the village of Bawdsey in Suffolk, England, about northeast of London. Built in 1886, it was enlarged in 1895 as the principal residence of Sir William Cuthbert Quilter. Requisitioned by the Devonshire Regiment during World War I and having been returned to the Quilter family after the war, it was purchased by the Air Ministry for £24,000 in 1936 to establish a new research station for developing the Chain Home RDF (radar) system. RAF Bawdsey was a base through the Cold War until the 1990s. The manor is now used by PGL for courses and children's holidays. There is a small museum in the radar transmitter block. History Quilter period: 1886 to 1936 Bawdsey Manor was built in 1886 and enlarged in 1895 by William Quilter who was an art collector, one of the founders of the National Telephone Company, and was Liberal/Liberal Unionist Member of Parliament for Sudbury. He established a steam- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Range And Direction Finding
The history of radar (where radar stands for radio detection and ranging) started with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell's seminal work on electromagnetism. However, it was not until the early 20th century that systems able to use these principles were becoming widely available, and it was German inventor Christian Hülsmeyer who first used them to build a simple ship detection device intended to help avoid collisions in fog (Reichspatent Nr. 165546). True radar, such as the British Chain Home early warning system provided directional information to objects over short ranges, were developed over the next two decades. The development of systems able to produce short pulses of radio energy was the key advance that allowed modern radar systems to come into existence. By timing the pulses on an oscilloscope, the range could be determined and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AMES Type 7
The AMES Type 7, also known as the Final GCI, was a ground-based radar system introduced during World War II by the Royal Air Force (RAF). The Type 7 was the first truly modern radar used by the Allies, providing a 360 degree view of the airspace around the station out to a distance of about . It allowed fighter interceptions to be plotted directly from the radar display, a concept known as ground controlled intercept, or GCI. Earlier radars, like Chain Home (CH), provided the range and angle to a single target at a time. Arranging an intercept required a complex series of reports from multiple stations that were plotted at a central station. In a seminal 1939 memo, Robert Hanbury Brown showed that this Dowding system resulted in an inherent inaccuracy of approximately , and the only way to reduce this would be to arrange the interception directly from the radar screen. He suggested spinning the radar antenna and the CRT display to produce a 360 degree picture of the airspace arou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chain Home Low
Chain Home Low (CHL) was the name of a British early warning radar system operated by the RAF during World War II. The name refers to CHL's ability to detect aircraft flying at altitudes below the capabilities of the original Chain Home (CH) radars, where most CHL radars were co-located. CHL could reliably detect aircraft flying as low as . The official name was AMES Type 2, referring to the Air Ministry Experimental Station at Bawdsey Manor where it was developed, but this name was almost never used in practice. The system had originally been developed by the British Army's research group, also based at Bawdsey, as a system for detecting enemy shipping in the English Channel. It was built using the electronics being developed for the Airborne Interception radar systems, which worked on the 1.5 m band. This high-frequency (200 MHz), for the era, allowed it to use smaller antennas that could be swung back and forth to look for returns, in contrast to the enormous fixed anten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASV Mk
The following meanings of the abbreviation ASV are known to Wikipedia: * Adaptive servo-ventilation, a treatment for sleep apnea * Air-to-Surface Vessel radar (also "anti-surface vessel"), aircraft-mounted radars used to find ships and submarines * American Society for Virology * American Standard Version, a translation of the Bible released in 1901 * Amplicon sequence variant, a term used to refer to individual DNA sequences recovered from a high-throughput marker gene analysis * Anodic stripping voltammetry, a voltammetric method for quantitative determination of specific ionic species * Armeesportvereinigung Vorwärts, a former East Germany military sports club * M1117 Armored Security Vehicle, an armored fighting vehicle produced by Textron * Asociación de Scouts de Venezuela, the Scouts Association of Venezuela * Astronomical Society of Victoria, Australia * ASV Records, a UK record label * Autonomous Surface Vehicle * Vatican Secret Archives , seal = Seal of the Vatican ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
