The first version of this radar, Type 79X, was mounted on the RN Signal School's tender, the minesweeperHMS Saltburn, in October 1936. This equipment used a frequency of 75 MHz and a wavelength of 4 metres and its antennae were strung between the ship's masts. They detected an aircraft at an altitude of 500 feet (150 m) and a range of 17 nautical miles (31 km; 20 mi) during tests in July 1937.
Improved versions, Type 79Y, were developed the following year that used a frequency of 43 MHz (7 metres). It required separate transmitting and receiving antennas and had a power output between 15 and 20 kW. The first set was installed in September 1938 aboard the light cruiserHMS Sheffield and gave detection ranges up to 53 nautical miles (98 km; 61 mi) for an aircraft at 10,000 feet (3,050 m). A second set was mounted on the battleshipHMS Rodney the following month, but it was not tested until January 1939.
A more powerful version, Type 79Z, was fitted to the anti-aircraft cruiserHMS Curlew in September 1939 and proved to be successful enough that forty more sets were ordered with the designation of Type 79. The antennae were manually rotated, but only enough wire was provided to rotate a maximum of 400°.[2][3]
Type 79B consolidated the transmitting and receiving antennae into one and its detection range was increased to 90 nautical miles (170 km; 100 mi) for an aircraft at 20,000 feet (6,100 m). The radar also had a secondary ability to track a surface target at ranges from 2–6 nautical miles (3.7–11.1 km; 2.3–6.9 mi).[4]
Brown, Louis (1999). A Radar History of World War II: Technological and Military Imperatives. Bristol and Philadelphia: Institute of Physics Publishing. ISBN0-7503-0659-9.
Friedman, Norman (1981). Naval Radar. London: Conway Maritime Press. ISBN0-85177-238-2.
Swords, Sean S. (1986). Technical History of the Beginnings of Radar. London: IEE/Peter Peregrinus. ISBN0-86341-043-X.
Watson, Raymond C. Jr. (2009). Radar Origins Worldwide: History of Its Evolution in 13 Nations Through World War II. Trafford. ISBN978-1-4269-2111-7.
External linksedit
October 29, 2023
type, radar, british, naval, early, warning, radar, developed, before, world, first, radar, system, deployed, royal, navy, type, 79country, originunited, kingdomintroduced1939no, built40typeearly, warning, radarfrequency43, mhzprf50, secondbeamwidth70, horizon. The Type 79 radar was a British naval early warning radar developed before World War II It was the first radar system deployed by the Royal Navy 1 Type 79Country of originUnited KingdomIntroduced1939No built40TypeEarly warning radarFrequency43 MHzPRF50 per secondBeamwidth70 horizontal Pulsewidth8 30 msRange30 50 mi 48 80 km Power70 kWThe first version of this radar Type 79X was mounted on the RN Signal School s tender the minesweeper HMS Saltburn in October 1936 This equipment used a frequency of 75 MHz and a wavelength of 4 metres and its antennae were strung between the ship s masts They detected an aircraft at an altitude of 500 feet 150 m and a range of 17 nautical miles 31 km 20 mi during tests in July 1937 Improved versions Type 79Y were developed the following year that used a frequency of 43 MHz 7 metres It required separate transmitting and receiving antennas and had a power output between 15 and 20 kW The first set was installed in September 1938 aboard the light cruiser HMS Sheffield and gave detection ranges up to 53 nautical miles 98 km 61 mi for an aircraft at 10 000 feet 3 050 m A second set was mounted on the battleship HMS Rodney the following month but it was not tested until January 1939 A more powerful version Type 79Z was fitted to the anti aircraft cruiser HMS Curlew in September 1939 and proved to be successful enough that forty more sets were ordered with the designation of Type 79 The antennae were manually rotated but only enough wire was provided to rotate a maximum of 400 2 3 Type 79B consolidated the transmitting and receiving antennae into one and its detection range was increased to 90 nautical miles 170 km 100 mi for an aircraft at 20 000 feet 6 100 m The radar also had a secondary ability to track a surface target at ranges from 2 6 nautical miles 3 7 11 1 km 2 3 6 9 mi 4 Notes edit Friedman p 190 Brown pp 62 63 Swords pp 87 88 Friedman pp 190 191Bibliography editBrown Louis 1999 A Radar History of World War II Technological and Military Imperatives Bristol and Philadelphia Institute of Physics Publishing ISBN 0 7503 0659 9 Friedman Norman 1981 Naval Radar London Conway Maritime Press ISBN 0 85177 238 2 Swords Sean S 1986 Technical History of the Beginnings of Radar London IEE Peter Peregrinus ISBN 0 86341 043 X Watson Raymond C Jr 2009 Radar Origins Worldwide History of Its Evolution in 13 Nations Through World War II Trafford ISBN 978 1 4269 2111 7 External links editThe RN Radar and Communications Museum Retrieved from https en wikipedia org w index php title Type 79 radar amp oldid 1034183214, wikipedia, wiki, book, books, library,
