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Aviation History
1974
1974 - 0343.PDF
FLIGHT International, 7 March 1974 307 Avionics No. 169 The CAA's plans for Doppler 0" 40" 80" 120" 160" 200' 240" 280" 320° 360" Azimuth in degrees T HE BRITISH Civil Aviation Authority expects to have four Doppler VORs in service by the end of April. In 1972 the CAA ordered 15 DVORs, having decided that solid-state double- sideband DVOR would be the standard ground-based navigation facility in the United Kingdom. The order, including aerials and new buildings, was worth just over £1 million. Five sets of equipment were ordered from Stan dard Electric Lorenz for sites where early replacement was necessary. The order for the other ten, for an all- British DVOR, went to Plessey Radar which had privately developed a DVOR to meet the CAA's specification. The first four operational DVORs— at Ongar, Clacton, Daventry and Biggin Hill—are all supplied by Standard Electric Lorenz. The sets are in fairly advanced stages of com missioning and flight-test calibration. In order to make maintenance easier, it seems likely that the remaining SEL-supplied set will be installed within the CAA's southern mainten ance division. The first Plessey set will be installed at Berry Head and the second at Ibsley. According to its annual report, the CAA expects to replace all 41 "con ventional" VORs installed in the United Kingdom with Doppler equip ment. It is already evaluating tenders for the next batch to be ordered. Out side the United States the three main DVOR manufacturers are Amal gamated Wireless of Australia, Plessey Radar and SEL. Doppler VOR dates back to 1945 and was first demonstrated experi mentally in 1949. Flight tests took place in 1958. The first tests of double-sideband DVORs in the Unitei Kingdom began in 1971 after an American-manufactured set had been installed at Biggin Hill. It was supplied after a collaborative agreement for a joint programme of trials and study The first SE.L DVOR is installed at St Pantaleon near Salzburg on a site where a conventional VOR had proved unsatisfactory. The sort of improvement to accuracy that DVOR brings can be seen from the results of tests con ducted by SEL at a poor site in the Rhine valley near Frankfurt. Measurements were made by orbiting the site at a distance of 5 miles at 1,500ft (illustration courtesy of "Airports International") had been reached with the American Federal Aviation Administration. DVOR is less sensitive to installation and siting errors and the manufac turers claim that although DVOR is more expensive, it has lower mainten ance and operational costs. The CAA intends that some of the Plessey in stallations will be equipped with remote sensing and monitoring equip ment supplied by Intelogic. This system will make use of Post Office telephone lines for the transmission of data. SHORT SUPPLY Flight offers its help to the aero space industry in this time of short ages. If any manufacturer has a serious shortage which is holding up production and deliveries he should send his name, address and telephone number with a specific description of his shortage to the Editor, Flight International, Dorset House, Stamford Street, London SE1 9LU. Shortages will be editorially notified on this page so that potential suppliers can get directly in touch. There will be no charge for this service. Who's selling what Sabena has ordered a Boeing 737 simulator, worth $1 • 1 million, from Atkins and Merrill (Parker St, May- nard, Mass 01754). Marconi Radar Systems (New Park, Leicester) is to supply a Type IVR-2 runway-visual-range measurement sys tem to Prague Airport. CAE Electronics (St Laurent, Quebec) is to supply Air Canada with a $1 • 7 million Boeing 727-200 flight simulator, including a six-degrees-of-freedom motion system. Varig has ordered Model 901 auto matic test equipment worth $500,000 from Sperry Flight Systems (PO Box 21111, Phoenix, Ariz 85036). The equipment will test avionics in DC-lOs, Boeing 707s, 727s and 737s. Cossor Electronics (The Pinnacles, Elizabeth Way, Harlow, Essex) has won a £71,000 contract from the British Ministry of Defence's Procure ment Executive for more CRM 555 ILS/VOR ramp test sets. Aero Mexico has ordered triple LTN- 72 inertial navigators from Litton Industries' Aero Products Division (21050 Burbank Blvd, Woodland Hills, Calif 91364) for each of its two DC-lOs. Three spare systems will also be bought. People and posts Cdr J. L. Rigge has been appointed general manager, Spain, of Plessey. Mr P. R. Houchin has been ap pointed sales director of Houchin. Mr Peter Brighton has been ap pointed managing director of Collins of England. Mr T. K. Cresswell has been ap pointed aircraft product manager of Aeroquip (UKJ. Mr R. W. McCann has been ap pointed general manager of Corning Electronics Europe. Dr T. W. Farthing has been ap pointed managing director of the New Metals Division of Imperial Metal Industries (Kynoch). Mr Albert E. Nash has been ap pointed vice-president and general manager of Universal Oil Products' Aerospace Division. Mr Ron Hosking has been appointed manager of FieldTech's Communica tions Division. Mr Malcolm J. Hinge becomes the company's administration manager.
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