Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/AI_Mk._VIII_radar> ?p ?o }
- AI_Mk._VIII_radar abstract "Airborne Interception radar, Mark VIII, or AI Mk. VIII for short, was the first operational microwave-frequency air-to-air radar. It was used by Royal Air Force night fighters from late 1941 until the end of World War II. The basic concept, using a moving parabolic antenna to search for targets and track them accurately, remained in use by most airborne radars well into the 1980s.Low-level development began in 1939 but was greatly sped after the introduction of the cavity magnetron in early 1940. This operated at 9.1 cm wavelength (3 GHz), much shorter than the 1.5 m wavelength of the earlier AI Mk. IV. Shorter wavelengths allowed it to use smaller and much more directional antennas. This provided the important advantage of allowing the radar to avoid ground reflections simply by pointing the antenna upward. The Mk. IV's semi-directional antennas were blinded by noise while flying at low altitude, while the Mk. VIII could see anything above the fighter's altitude. When the Luftwaffe began low-level attacks in 1941, the need for this sort of radar arose just as the design was beginning to mature.A prototype version, the Mk. VII, entered service on the Bristol Beaufighter in November 1941. A small number of these were sent to units across the UK to provide coverage at low altitudes while Mk. IV equipped aircraft operated at higher altitudes. After a small run of Mk. VIIIA, the definitive Mk. VIII arrived in early 1942, offering higher power through the use of the new strapped magnetron, as well as a host of electronic and packaging upgrades. It arrived just as supplies of the De Havilland Mosquito began to improve, quickly displacing the older units in RAF squadrons. Mk. VIII equipped Mosquitoes would be the premier night fighter from 1943 through the rest of the war.The Mk. VIII spawned a number of variants, notably the AI Mk. IX which included a lock-on feature to ease interceptions. A series of events, including a deadly friendly fire incident, so greatly delayed the Mk. IX that it never entered service. During the late-war period, many UK aircraft adopted the US SCR-720 under the name AI Mk. X. This worked along the same general principles as the Mk. VIII, but used a different display system that offered several advantages. Development of the basic system continued, and the Mk. IX would eventually briefly re-appear in greatly advanced form as the AI.17 during the 1950s.".
- AI_Mk._VIII_radar thumbnail AI_Mk._VIIA_radar_in_Bristol_Beaufighter_VIF_CH16665.jpg?width=300.
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- AI_Mk._VIII_radar wikiPageExternalLink 632_AP1093D_Pt2_Introductory_Survey_of_Radar_screenread.pdf.
- AI_Mk._VIII_radar wikiPageExternalLink A_SHORT_HISTORY_OF_AIR_INTERCEPT_RADAR_AND_THE_BRITISH_Pt_1.pdf.
- AI_Mk._VIII_radar wikiPageExternalLink A_SHORT_HISTORY_OF_AIR_INTERCEPT_RADAR_AND_THE_BRITISH_Pt_2.pdf.
- AI_Mk._VIII_radar wikiPageExternalLink AIMK8.htm.
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- AI_Mk._VIII_radar wikiPageRevisionID "697145468".
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- AI_Mk._VIII_radar wikiPageWikiLink Air_Defence_of_Great_Britain.
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- AI_Mk._VIII_radar wikiPageWikiLink Alan_Lloyd_Hodgkin.
- AI_Mk._VIII_radar wikiPageWikiLink Albert_Rowe_(physicist).
- AI_Mk._VIII_radar wikiPageWikiLink Altitude.
- AI_Mk._VIII_radar wikiPageWikiLink Anode.
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- AI_Mk._VIII_radar wikiPageWikiLink Category:Aircraft_radars.
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- AI_Mk._VIII_radar wikiPageWikiLink Category:World_War_II_British_electronics.
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- AI_Mk._VIII_radar wikiPageWikiLink Central_Fighter_Establishment.
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- AI_Mk._VIII_radar wikiPageWikiLink De_Havilland_Mosquito.
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- AI_Mk._VIII_radar wikiPageWikiLink File:Maincollege.jpg.
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- AI_Mk._VIII_radar wikiPageWikiLink Fluorescent_lamp.
- AI_Mk._VIII_radar wikiPageWikiLink Focke-Wulf_Fw_190.
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- AI_Mk._VIII_radar wikiPageWikiLink Frederic_Calland_Williams.
- AI_Mk._VIII_radar wikiPageWikiLink Frederick_Alfred_Pile.
- AI_Mk._VIII_radar wikiPageWikiLink Frederick_Lindemann,_1st_Viscount_Cherwell.
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- AI_Mk._VIII_radar wikiPageWikiLink GL_Mk._III_radar.
- AI_Mk._VIII_radar wikiPageWikiLink Gee_(navigation).
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- AI_Mk._VIII_radar wikiPageWikiLink German_battleship_Scharnhorst.
- AI_Mk._VIII_radar wikiPageWikiLink Gloster_Meteor.
- AI_Mk._VIII_radar wikiPageWikiLink Ground-controlled_interception.
- AI_Mk._VIII_radar wikiPageWikiLink Gyro_gunsight.
- AI_Mk._VIII_radar wikiPageWikiLink H2S_(radar).
- AI_Mk._VIII_radar wikiPageWikiLink HMS_Sealion_(72S).
- AI_Mk._VIII_radar wikiPageWikiLink Hamburg.