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Aviation History
1955
1955 - 0794.PDF
792 FLIGHT, 10 June 1955 ' .., . de Hayilland Super Sprite. ' -: BRITAIN'S CONTRIBUTION ... Hobson (Stand No. 55) Of special interest will be a work- ing model of the Hobson powered flying control Type 163, designed to operate the tailplane of the Gloster Javelin and embodying a screw-type jack powered by a duplicated hydraulic system. A built-in collapsible-link device affords protection against a "runaway" condition due to control-valve seizure. Additionally, there will be models of the Mk 6, Mk 7 and Type 145 powered flying controls and the Hobson feel simulator. The last-named employs hydraulic power to apply artificial forces to the control column. Other exhibits include the Hobson powered flying controls Types 190, 194, 157, Mk 8, 189 and 147—the 147 being designed to operate the, elevator of a heavy bomber. Feel simulator controls will be of Type 175 (Mach- number corrected), Type 183 and Type 195, and injection car- burettors of the Type A.R.I and Type 122 ALM.6. Other items will be the fuel pump Type 123 ALM.6, the master-control injection carburettor Type B.C.19M, injection carburettor Type B.I/B.H.11, carburettor Type A.I./55-J (as fitted on the French Potez 6D-00 engine), and carburettor Type A.I./55-E. The company also intend to have their speed-governing fuel control unit Type 100, anti-g and fuel cut-off valve Type 124, and booster pump Type 1400. H. M. Hobson, Ltd., Fordhouses, Wolverhampton, Staffs. Jablo Plastics Industries (Stand No. 209B) This company will show lightweight plastics for refrigeration and sound insula- tion, anti-vibration measures, buoyancy, hollow-structure fillers, and upholstery. Other items will be lightweight insulated con- tainers for perishable goods in air transit, and lightweight panels for partitions. Jabroc (laminated wood) will be shown in the form of tools, assembly jigs and templates. Jablo Plastics Indus- tries, Ltd., Mill Lane, Waddon, Croydon, Surrey. Lodge Plugs (Stand No. 31) Sintox insulated and screened aircraft sparking plugs for British, American and other engines will be on view, together with Lodge igniters for jet engines (including de Havilland and Rolls-Royce types) and Lodge specialized servicing equipment for aircraft plugs—the spark and leak tester, hot leak tester and chemical cleaner. Lodge Plugs, Ltd., Rugby. Lucas and Rotax (Stand No. Ill) A Lucas reheat turbo- pump, driven by a two-stage air turbine turning at 25,000 r.p.m. and drawing about 0.69 lb of compressor-bleed air per second, will be shown in sectioned form. There will be a range-tempera- ture control unit, hydro mechanical governors, and a turboprop jet-pipe temperature limiter in which long quartz rods, with a large sensitive area, are housed in a fairing extending across the jet-pipe. The Lucas range of de-icing and space heating equip- ment will be represented, as will a variety of high-temperature bellows in various materials, including Nimonic alloys. Rotax will show their fuel/air turbine starter which, being split up into motor and remote control units, does not require a long nose bullet. Other recent fuel/air starter equipment will include the four-stage air compressor, with air cooling, and delivering at 3,000 lb/sq in to a glass-fibre air bottle. Lastly there wiS be pre-fabricated ignition harness for gas turbines. Joseph Lucas (Gas Turbine Equipment), Ltd., and Rotax, Ltd., Chandos Road, London, N.W.10. Marconi (Stand No. 30) A big feature of the Marconi sec- tion of the English Electric stand will be a demonstration of the A.D.307 multi-channel self-tuning HF transmitter/receiver, primarily designed for pilot-operated service. Two hundred crystal-controlled channels are available and entire automatic frequency changing with self-tuning circuits is provided. The set will be raised off the exhibition table and will have mirrors beneath so that the working of all parts can be seen. An aircraft set which will be on public view for the first time is the AD.704 VOR/localizer/communication receiver, with frequency coverage of 108-136 Mc/s, which forms part of the new AD.704/706/708 receiver combination for VOR/ILS, the other units being the glide slope and marker receivers. Three other Marconi aircraft installations will be the AD.115 VHF multi-channel communica- tion transmitter/receiver; the AD.7092D automatic direction finder (radio compass); and the AD.401 intercommunication equipment. Ground installations will be a console unit of the AD.200 VHF automatic direction finder < working), and the aerial exciter unit of the AD. 503 VOR equipment. Finally there will be models of a VOR beacon and the new S.232 airfield radar. Marconi's Wireless Telegraph Co., Ltd., Marconi House, Chelmsford, Essex. Napier (Stand No. 30) Key exhibits will be the Eland turboprop and the Oryx turbo-gas generator, as now under development for helicopters such as the Hunting Percival P.74. On demonstration will be the Napier contour de-icing equip- ment, on the spinner of the Eland. The Eland is a single-shaft , - ra Gloster Javelin FAW.l. turboprop with a ten-stage compressor, six combustion chambers and three-stage turbine. Diameter is 36.1 in, length 104.5in, dry weight 1,575 lb, and maximum power, 3,007 e.s.h.p. at 12,500 r.p.m. with a specific fuel consumption of 0.624 lb/hr/ e.sli.p. A typical cruising si.c. is 0.480 lb/hr/e.sJi.p. at 35,OOOft. The Oryx has been developed by the Napier company to a Ministry of Supply contract to supply a steady flow of hot gas, at a relatively low pressure, to a power-producing section remote from the unit itself. The gas could be fed to a power turbine driving propulsive airscrews or could be ducted through the hollow blades of a helicopter rotor to feed propulsive jets at the blade tips. The axial compressor employed is possibly the smallest ever used in an aero engine. Maximum diameter of the engine is 19£in, dry weight 495 lb, and maximum sea level output 750 gas horse-power, with a specific fuel consumption of 0.68 lb/hr/gJh.p. D. Napier and Son, Ltd., 211, The Vale, Acton, London, W.3. Normalair (Stand No. 27) Centrepiece of the Normalair stand will be a three-dimensional scale model of a representative air-conditioning and cabin pressurization system for a large passenger aircraft. The many units also on display will be grouped as: equipment in the Vickers Viscount; equipment in British air- craft ordered for NATO; equipment in American aircraft in ser- vice with NATO; new developments in cabin atmosphere control equipment; and oxygen equipment. Especially noteworthy will be the automatic flow controller for civil transport aircraft, and a butterfly flow-control valve. Among air-conditioning items will be two entirely new mixing valves, together with a venturi humidi- fier, which permits a very high degree of water absorption, embodies no pumps and requires no head of water for efficient working. Among new items of oxygen equipment will be the Type NF oxygen mask. Nortnalair, Ltd., YeovU, Somerset. Plessey International (Stand No. 36) Newly developed items to be displayed will include a liquid-fuel starter for gas turbines, a high frequency ignition system, windscreen de-icing controller, flasher units, crimping tools, magnetic indicators, elec- tric tachometer, actuators, pumps, plugs, sockets and pre-formed wiring and HF and VHF equipment for airborne and ground operation. Two versions of the liquid-fuel starter will be shown, both using iso-propyl nitrates; the larger is now starting "the largest turbojet engines projected to date." Starting is achieved within the voltage range 16-26v from the aircraft's batteries. The cost per start is 4s for present turbojets and up to 7s for the larger types under development; the unit weighs 95 lb. Within ten seconds from pressing the "on" button the turbojet is at idling speed. Plessey International Ltd., Vicarage Lane, Ilford, Essex. Rolls-Royce (Stand No. 24) Although Rolls-Royce will not be represented on their own behalf in the flying display, a num- ber of machines will be powered with Rolls-Royce engines. Notable among these will be the supersonic Mystere, fitted with an Avon supplied from Derby, though Hispano-Suiza were responsible for the installation. On the Rolls-Royce stand will be examples of the Avon and Soar turbojets and a sectioned Dart turboprop. The Avon will be representative of a 10,000 lb thrust unit, weighing 2,890 1b, and the Soar will be of the RSr.2 type, delivering 1,810 lb thrust for 275 lb weight. Quoted figures for the Dart are 1,600 b.h.p. for 1,110 lb weight. Particular interest is likely to be attracted by the Soar, for this unit has not hitherto been shown outside England. For development flying a Meteor has been adapted to carry a Soar at each wing tip. The Soar is already in production for a wide range of applications, and is particularly significant in view of Rolls-Royce's known activities in the field of jet lift. Rolls-Royce, Ltd., Derby. Rotol (Stand No. 43) Outstanding among the Rotol exhibits will be an airscrew specifically designed for the Viscount 800, powered by the 1,650 h.p. Rolls-Royce Dart 510 (or RDa.6) turboprops. It embodies the following new features: square- tipped, high-activity blades; steel sheet protection for de-icing overshoes; third oil-line operation of the flight fine-pitch lock; emergency electro-hydraulic flight fine-pitch stop. Nearby will be associated equipment—the controller unit, feathering pump, synchronizer alternator, corrector motor and accessory gear-box. A typical air turbine will also be shown, without its associated gear-box and accessories, in order to demonstrate the basic driving mechanism. Of 7| inches diameter, it is capable of develop- ing 100 h.p. A complete ram-air turbine, designed to provide emergency power in the event of main engine failure, will also be on view. The fuel-flow proportioner exhibited will be a two- cell type actuated by the action of the fuel passing through it, ' and the accessory gearbox will be for an Armstrong Siddeley
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