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Aviation History
1962
1962 - 0263.PDF
FLIGHT International, 15 February 1962 265 INDUSTRY I nternational Flight Systems Products Company News Flight Systems Harco v. Vordac The Harco navigation system proposed to Eurocontrol by Decca Navigator, C.S.F. and Telefunken now has a rival in Vordac, proposed by a European group of subsidiaries of International Telephone and Telegraph Corporation. The companies involved are Standard Telephones and Cables, L.M.T., Standard Elektrik Lorenz, the Dutch Bell Telephone Manufacturing Co and Nederlandsche Electric Maatschappij. Vordac is based on position-fixing from multiple DME readings, and American sources claim that an accuracy of 0.5 n.m. would be easy to achieve and down to 0.2 n.m. possible with well-sited beacons. A pictorial presentation has been tested in the USA. We hope to publish further details in the near future. With atomic frequency standards, two-way transmissions would become unnecessary and the capa city of the system would be high. The FAA Project Beacon report mentions such a system as a future possibility for US airways. During a recent visit to Europe, Mr Najeeb Halaby, FAA Administrator, is reported to have indicated to Eurocontrol that compatibility of the US and Euro- control navigation systems, particularly for American military aircraft over Europe, ought to be maintained. This does not necessarily mean that the sources of navigational information must be identical. Interference problems between DMETs and between co-located DMET and VOR are still being mentioned. Piper Radio The Piper Electronics Divi sion at Vero Beach has for some time been producing the AutoControl two-axis auto pilot, the AltiMatic three-axis unit and the AutoNav direction finder. They have now developed the PTR-1, a tunable VHF receiver covering 108 to 128Mc/s and 25- channel, 2 watt transmitter having a VOR converter and power pack built-in to the single panel-mounted unit. The transmitter can cover either high or low communica tions bands so that a dual installation would A new view of the GEC Dexan airborne digital computer. In the top row, I to r: calculator unit, core store and digital differential analyser. Below, the photo-electric tape reader and computer control unit give wide frequency-coverage. Price is to be about £214 in the USA. Mr George Denhofer, formerly sales engineer of Mitchell, who originally de signed the Piper autopilot, has been ap pointed manager of sales and service of the Piper Electronics Division and will be based at Lock Haven. Products Miniature Digital Display Counting In struments Ltd, of 5 Elstree Way, Boreham Wood, Herts, have developed the series 660 miniature digital display for back-projecting Miniature digital display by Counting Units Ltd figures or symbols on the 1-fein X lin face of the 4in-deep container. Each unit con tains 12 lamps, each of which will project the corresponding digit through a condenser and projection lens on to the front screen. Variously coloured digits and backgrounds can be provided, and decimal points can be included. Each unit weighs 3£oz, and stand ard voltage is 6. Delivery time is between four and six weeks and the price £8 per unit. Boom/drogue Conversion kit Although the British method of air refuelling, patented by Flight Refuelling Ltd, consists of the re ceiver aircraft pushing a probe into a drogue trailed by the tanker, the original US idea was for the tanker to ram a rigid boom into a socket on the receiver. The latter system, although standard in Strategic Air Command, is unsuitable for the fighter/ bombers of Tactical Air Command. The latter have in the past been fuelled by drogue-trailing KB-50 aircraft, but in order to enable them to take fuel from the 600 Boeing KC-135s of SAC an adapter hose
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