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- Type_281_radar abstract "The Type 281 radar was a British naval early warning radar developed during World War II. It replaced the Type 79 as the Royal Navy's main early warning radar during the war.The prototype system was mounted on the light cruiser HMS Dido in October 1940. This radar used a frequency of 90 MHz, a beamwidth of 35°, and a wavelength of 3.5 metres. It required separate transmitting and receiving antennas that were rotated by hand. For long-range warning the radar used a 15 microsecond pulse at a power level of 350 kW that gave a detection range up to 110 nautical miles (200 km; 130 mi) for aircraft. For tracking surface targets it used a 2–3 microsecond pulse at 1 MW that gave a range up to 12 nautical miles (22 km; 14 mi). A second set was installed in January 1941 aboard the battleship HMS Prince of Wales and production began of another 57 sets with the first deliveries occurring the following month.Type 281B consolidated the transmission and receiving antennas while the Type 281BP radar had the short pulse feature removed. It was fitted with improved receivers that increased the maximum detection range for an aircraft at 20,000 feet (6,100 m) to 120 nautical miles (220 km; 140 mi). At lower altitudes, ranges declined to 90 nautical miles (170 km; 100 mi) at 10,000 feet (3,050 m) and 65 nautical miles (120 km; 75 mi) at 5,000 feet (1,520 m). The Type 281BQ was a Type 281BP fitted with power rotation, at 2 or 4 rpm, and equipped with a plan position indicator. After the end of the war, the Type 281 was replaced by the Type 960 radar.".
- Type_281_radar thumbnail The_Royal_Navy_during_the_Second_World_War_A24895.jpg?width=300.
- Type_281_radar wikiPageExternalLink index.html.
- Type_281_radar wikiPageID "32576803".
- Type_281_radar wikiPageRevisionID "587591725".
- Type_281_radar beamwidth "35".
- Type_281_radar country "United Kingdom".
- Type_281_radar frequency "86".
- Type_281_radar hasPhotoCollection Type_281_radar.
- Type_281_radar introdate "1940".
- Type_281_radar name "Type 281".
- Type_281_radar number "59".
- Type_281_radar power "350".
- Type_281_radar prf "50".
- Type_281_radar pulsewidth "2".
- Type_281_radar type Early-warning_radar.
- Type_281_radar subject Category:Royal_Navy_Radar.
- Type_281_radar subject Category:Sea_radars.
- Type_281_radar subject Category:World_War_II_British_electronics.
- Type_281_radar subject Category:World_War_II_radars.
- Type_281_radar comment "The Type 281 radar was a British naval early warning radar developed during World War II. It replaced the Type 79 as the Royal Navy's main early warning radar during the war.The prototype system was mounted on the light cruiser HMS Dido in October 1940. This radar used a frequency of 90 MHz, a beamwidth of 35°, and a wavelength of 3.5 metres. It required separate transmitting and receiving antennas that were rotated by hand.".
- Type_281_radar label "Type 281 radar".
- Type_281_radar sameAs Type_281_radar.
- Type_281_radar sameAs m.0h1hkq8.
- Type_281_radar sameAs Q7860690.
- Type_281_radar sameAs Q7860690.
- Type_281_radar wasDerivedFrom Type_281_radar?oldid=587591725.
- Type_281_radar depiction The_Royal_Navy_during_the_Second_World_War_A24895.jpg.
- Type_281_radar isPrimaryTopicOf Type_281_radar.
