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Aviation History
1962
1962 - 0227.PDF
fl 1GHT International, 8 February 1962 \rropilot Changes Hands Manufacturing riehts and tooling for the Federal-ITT auto pilot for light aircraft, illustrated here, have been acquired by Aircraft Components Inc, o, Benton Harbour, Michigan. The only three-axis, two-gyro autopilot to sell for less than $1,000, the Federal unit employs modified panel-mounted instruments, has irree chain-drive servos, controls for turn, course trim and pitch trim, and is all- eiectric. It is FAA certificated for the Cessna 172,180,182, and 310, Piper Apache, Aero Commander, Bonanza, Twin Bonanza and On Mark. It will soon be cleared for the Tri-Pacer, Beech Model 18 and Debonair. 229 Control panel, turn-and-slip sensor and sensor computer/servo unit of the three-axis, two-gyro Federal autopilot which, as related above, is now being produced by Aircraft Components Inc Products EEC Make Buccaneer 2 System A con tract for the development of the electrical generating system of the Blackburn Buc caneer S.2 has been placed with English Electric's Aircraft Equipment Division at Bradford, Yorks. Each of the Rolls-Royce Spey engines will be coupled to an English Electric constant-speed drive to brushless generators, with static control and protec tion units. Fairey and the Trident When the original Airco consortium was formed in 1958 to manufacture the D.H.I21 Trident the design and manufacture of the tail unit were made the responsibility of Fairey Aviation. Today the position is as follows. Fairey Aviation Division of Westland Aircraft, at Hayes, continue to be responsible for the design and structural testing of the tail- plane and rudder. On the other hand, as described in our January 11 issue, the machining of the integrally stiffened upper and lower central tailplane skins is handled by Fairey Engineering Ltd at Stockport. Each component starts as a 1,6501b slab of 24ST alloy, which is contour-machined The Bristol Siddeley "Powertruc" (see news item in col 2) on the automatically controlled Fairey/ Ferranti 3-D miller to a finished weight of 1201b. The outer surface of each skin and the bottom faces of the pockets follow the aerodynamic curvature of the tailplane. Fairey Engineering are also the suppliers of the powered flying control units and hydraulic filters for the primary and secon dary systems. H. M. Hobson Ltd contri bute additional actuators, including those for the flaps and wing leading edge. Shorts to Investigate u.h.t. Steels Under MoA contract Short Brothers & Harland are evaluating three special types of steel, heat-treated to give tensile strength of 120 long tons/sq in as compared with the nor mal 90. Originally, one specification only was involved: a 3 %CrMoV steel of nominal EN.40C composition. On the introduction of vacuum-melting, with anticipated im proved transverse direction properties and reduced scatter in fatigue, the scope of the investigation was extended to include a 5%CrMoV material designated by Jessop- Saville as Vacumelt H.50. In order to provide a direct comparison with air-melted materials, it was decided to include a 5%CrMoV from Hadfields Ltd, having similar properties to the other 5% alloy and titled Hecla 174. Each forging, in the three specifications quoted, was to be heat-treated to give ultimate of 120 tons, whilst retaining the best possible ductility. An extensive metallurgical assessment of these forgings in various states of heat-treat ment, and covering pre- and post-plating treatments, was a basic part of the work. From this the optimum conditions for the finished components could be determined. The component selected is approximately 50in long, 8in tapering to 5in diameter, and having a wall thickness of 0.170in finished size. BS Powertruc The Power Division jof Bristol Siddeley Engines have acquired the Powertruc Company Limited, of Victoria Road, Burgess Hill, Sussex. Power- trues are mobile sources of power in which a single large engine (visible in the illustration) serves both to energize external equipment and also to drive the vehicle on the road. Environmental Connectors The new range of Viking Snap-E-Lock lightweight, circu lar environmental connectors is now being handled exclusively in this country by H. T. Newton & Co at Gatwick Airport, Horley, Surrey. Particular advantages claimed for these connectors are that they are waterproof at 151b/sq in when immersed and can therefore be used in test equipment mounted outside an airframe; they with stand vibration up to 30g; they lock auto matically when engaged and can therefore be manipulated by unskilled labour if necessary; and they are small in size. Various forms of connector with up to 19 contacts are available and all meet the applicable parts of Mil-Spec MIL-C-5015. EDP for Administration de Haviiland Aircraft have bought two English Electric KDF9 data processing systems for installa tion at Hatfield and Lostock, Lanes, during next year. The computers are to be used partly for calculations in connection with aircraft design, but also for production control and general administrative duties in the company. This is the first occasion on which a British company has ordered two systems of this size at once. English Electric claim that the KDF9 is, per unit of data-handling cost, the fastest and cheapest system in the world, employing the latest techniques in transistors, miniature circuits and magnetic tape. The machines will be made at the Data Processing and Control Systems Division at Kidsgrove, Staffs. A New Solenoid Valve for aircraft high- pressure air systems has been developed by the Hymatic Engineering Co Ltd, of Redditch, Worcs. Known as Type MAD 206, it has been designed for "in line" installation in any attitude. Approximately 3in long and weighing 1.81b, the valve is designed to operate over a pressure range Type MAD 206 solenoid valve, by the Hymatic Engineering Co Ltd, described above
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