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Aviation History
1964
1964 - 2066.PDF
fLIGHT International, 16 July 1964 87 TRADING STAMPS AND ALL THAT SOME weeks ago, British Eagle applied to the Air Transport Licensing Board for permission to give rebates to domestic passen- gers who were spending less on air transport than the annual limits set by BEA. It appeared that a modest and indirect type of price competition was planned—possibly inspired by the widespread appearance of trading stamps. This "undesirable" possibility led to a meeting of all the domestic airlines. Now applications from all of them have been published, seeking to release them from the rules relating to the 5 per cent and 10 per cent rebates awarded to holders of credit travel orders, and personal air travel warrants. It is reported that the airlines feel that these promotional discounts have achieved their object, and the traffic has been duly promoted. However, as worded the "release" would enable the airlines to award whatever discount they thought fit. As the Board has already abandoned control of no show charges, booking fees, and cancel- lation charges, and never has known what fares are charged to any passenger who is making an international connection, this further relaxation may appear quite logical. Or did Parliament say that the tariff for domestic flights should be "set out" in the licences ? INDIAN AIRPORT DEVELOPMENT THE Indian Government has announced a large programme of airport expansion aimed at meeting the operational requirements of civil and military aircraft. According to a Government statement, the introduction by IAC of Caravelles on to the airline's domestic trunk routes has led to the use of Viscounts on the high-density regional routes. Similarly, down the scale in size, civil and military DC-3s are being replaced by F-27s and HS.748s on regional and feeder routes. At the request of IAC, the civil aviation department is developing Begumpet airport to take Caravelles flying between Delhi and Madras which, it is reported, has been the most disappointing route from the break-even point of view on to which the twin-jet 84- seaters have been introduced. A stop at Begumpet is expected to improve the current 37 per cent load factor on the route. Agartala airport is to be developed to take Viscounts, and some 18 airfields on feeder routes are being developed to take F-27s. SILENCING THE JET THE theory that an extended plug nozzle protruding from the centre of an engine exhaust pipe will cause a rapid dissipation of the shock wave due to greater exposure of the shock surface, hence a reduction in the noise emanating from a turbine jet pipe, is to be investigated by the Williams Research Corporation of Walled Lake, Mich, under an FAA contract. Preliminary research on small-scale, supersonic, cold-jets has shown noise reductions up to 15db with no performance loss. Noise reductions of 20db or more at higher pressure ratios may be feasible. The study will include analytical and experimental work with a small, turbo-jet engine to determine the best design criteria for the plug nozzle. The company will also develop a small-scale version of a jet silencing system to demonstrate the effectiveness of the system and its likely impact on engine performance. Results of the small jet engine noise study are expected to provide a basis for further FAA programmes aimed at achieving significant reduc- tions of large jet engine noise from present and future commercial jet aircraft. ILS GLIDE SLOPE DEVELOPMENT A NEW component for ILS, known as the Capture Effect Glide Slope, has been developed by the FAA to replace existing ILS glide slopes at airports where terrain irregularities interefere with perfor- mance. Mr Henry H. Butts, an FAA electronics engineer, is credited with the development of CEGS which is said to not only provide more reliable and precise guidance at "problem sites," but to give more definite "fly up" indications below the normal approach path. It is expected that the new system will permit upgrading of ILS performance at selected airports, leading to the eventual capability of taking a part in an all-weather blind-landing system. Apart from the obvious economic benefits to be derived from lower permitted weather minima, the system does not require such expensive site preparation and levelling beneath the approach path as does the conventional system to make it function accurately. CEGS, which is compatable with present airborne receivers, is already in operation at Duluth, Minn; Knoxville, Tenn; and Tempelhof, Berlin. On the tiny mountain-locked compacted-sand strip at Calvi in north Corsica: one of the large fleet of 28 Air France DC-4s used on domestic postal and passenger flights "Flight International" photograph
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