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Aviation History
1963
1963 - 1819.PDF
628 FLIGHT International, 10 October 1963 INDUSTRY International Products Company News Great Britain AEI's Belfast Contribution Nearly 500 pieces of equipment in each Short Belfast are being supplied by the Aircraft Equip ment Group of Associated Electrical Industries Ltd. Among the items are motor- generating sets, a.c. and d.c. motors, toggle switches, contactors and circuit breakers. A frequency-wild generating system is used on the aircraft, the frequency varying with engine speed, and a 28V d.c. supply is rectified from this system. The auto- landing gear and various flight instruments, however, need a constant-frequency power supply and this is provided by four AEI motor-generator sets, the d.c. motor of each driving an alternator having an out put of 200V, 400c/s, 3ph. Semi-conductor regulators give a tolerance of ±2 per cent on voltage and frequency. Each aircraft will have nine AEI a.c. motors ranging from l/80th to 9 h.p. for driving such equipment as de-icing timers, and fans for radio-cooling, air recirculation and air-conditioning. The de-icing timers, driven through high-ratio gearboxes, are low- current cyclic switches which operate various contactors in turn to de-ice different parts of the aircraft. Seven d.c. motors will be used for the airscrew feathering pumps and windscreen wipers. AEI is also supplying most of the switch- gear. There will be 70 contactors for switch ing d.c. powers up to 600A at 28V and a.c. powers up to 100A at 200V, 3 ph, and 85 circuit breakers for protecting cables and equipment. The reverse-current circuit- breaker in the battery circuit is capable of rupturing 10,000A up to 70,000ft under a fault condition. A total of 281 AEI toggle switches, three-quarters of them single-pole, are to be fitted. Other equipment being supplied by AEI includes phase-discriminator units, which cause all three phases supplying the inter- cooler system fan motor to be isolated if one phase fails. Nine ground/flight con nectors and plugs will be fitted to enable all the electrical apparatus in the aircraft, except the generators, to be tested by ground equipment. To do this, the flight connector plug is replaced by the ground/flight plug, and a power supply, equivalent to that given by the generators, is connected. AEI also provide the high-energy ignition unit, giving a peak discharge current of about 1,500A and a 50-microsecond duration of discharge. . Dowty Undercarriage Longevity When West Coast Airlines of Seattle recently stripped down a set of landing gear on one of their Fokker Friendship fleet, after the aircraft had done more than 20,000 take- offs and landings and taxied over 100,000 miles, no significant wear was found and only minor details of the assembly had to be replaced. In addition to the main and nose undercarriages, Dowty manufacture pro pellers and auxiliary gearboxes for Friend ships, which are being flown by 65 operators in 22 countries and have been ordered by 75 customers in 27 countries. Of the 242 so far ordered, 218 have been delivered. Penflex Harness Order A preliminary order for just over 500 Penflex wiring harnesses is being completed at the BTR Industries subsidiary, Palmer Aero Pro ducts Ltd, Penfold Street, Edgware Road, London NW8. Fitted in the first instance to the Bristol Siddeley Gnome which powers the Agusta 204B, they will also be fitted to the Wessex 2 and 5 and both military and civil versions of the Whirlwind. Penflex harness, it is stated, is completely resistant to lubricating oil and all other acids and alkalis normally used in aircraft. A valuable feature is its indefinite shelf life, coupled with the fact that it does not support mould growth. Operating temperatures are from —40°C to +200°C. At present it is available in Jin internal bore in lengths of up to 4ft and fin internal bore up to 6ft, and it is ultimately hoped to produce an internal bore of 1.25in in longer lengths. Penflex units are AID spark-tested to 10,000V. Sir Richard Joins HSA Air Marshal Sir Richard Atcherley, KBE, CB, AFC, RAF (Ret), has accepted an invitation to join Hawker Siddeley Aviation Ltd, Hawker Blackburn Division, as executive director (Gnat sales) and will continue the work he has under taken as sales director of Folland Aircraft Ltd. He will be responsible to the chief executive of the Hawker Blackburn Div ision. Mr Green Retires After 42 years' service, Mr Jack Green, OBE, Director and Controller General (Engineering) of Avro, said farewell to his friends and associates in a ceremony at Chadderton on September 27, when he was presented with a watch and cufflinks as mementoes. Company apprentices also made him a presentation of a specially made set of tools. Sir Harry Broadhurst, director and chief executive of the Avro Whitworth Division of Hawker Siddeley Aviation. presided at the ceremony; and Sir Roy Dobson, chairman of the Hawker Siddeley Group, in a speech recalling the highlights of Mr Green's career—especially his feats in getting Lancaster production going during the last war—said of him: "He has devoted his life to the service of the company and to the service of his country." Mr Green Aerodrome Owners' Association members at Coventry Airport during their annual conference (reported last week) with a model of the Hawker Siddeley Argosy civil freighter. From left, Mr J. hatha, airport manager; Mr M. C. Luckham, sales representative, HSA Avro Whitworth Division; Sqn Ldr A. W. day, AOA secretary; Mr A. G. G. Marshall, Cambridge Airport manager and AOA Vice- chairman; Ctlr J. D. Berry, AOA chairman and vice-chairman of Coventry's aerodrome committee; Ch Off A. Leese, chief fire officer, Coventry; and Cllr J. H. Thompson, aerodrome committee chairman
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