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Aviation History
1958
1958 - 0454.PDF
THE INDUSTRY Hangar Height-saving T"\EPICTED in our Civil Aviation pages on February 21, the-L' sliding doors at B.O.A.C's London Airport base are shown here in more detail.Twenty-four of these doors are installed on each side of the hanger. Ten are motorised; and three pairs, when closed, formapertures to accommodate the tail units of Britannias. The contract for fabrication and erection of the doors wasawarded to Marfax, Ltd., of Mitcham, Surrey. Each is 32ft high and 23ft 6in wide, and each of the un-motorised units weighedIf tons before cladding with aluminium N.S.3 sheet secured to the welded framework by Monel Pop rivets. Extruded aluminium top-hat section is used to cover the assembly bolt heads and provide a neat finish. Each powered door has a strengthened chassis tocarry the 2 h.p. motor, fluid drive and clutch mechanism. Flexible fabric gaskets seal the gap between the door and thefuselage when the "clamping" units are closed, to allow some free- dom of movement to aircraft being serviced. When the bay is notin use braced light-alloy flaps close the opening. The consulting engineers for this contract were Bernard L.Clark and Partners, Ltd., who designed the doors in conjunction with Mr. L. B. Haley, chief civil engineer to B.O.A.C. Lightweight Cables INTRODUCED in collaboration with the aircraft industry toBritish Standard Specification E.24, Nyvin cables manufac- tured by Rist's Wires and Cables, Ltd., are designed to thesmallest possible dimension and with weights reduced to a mini- mum. They are, in fact, claimed to be the lightest possible withpresent-day materials. In general construction the cables consist of copper conductors(tinned copper wires bunched or stranded) insulated with a hard grade of p.v.c, over which is applied a glass-fibre braid and thena braid of nylon ribbon. The exterior is finished with clear nylon lacquer. Characteristics of the cables include fire resistance, reten-tion of flexibility after exposure to high temperatures, and resist- ance to the majority of deleterious fluids commonly employed inaircraft. A technical data booklet has recently been introduced and maybe obtained on application to the company's sales manager, Mr. C. Morriss, at Lower Milehouse Lane, Newcastle, Staffs. Transistors on the Screen A SERIES of short instructional films on the application and•^*- production of transistors, intended for either technical or non-technical audiences, has been produced by Milliard, Ltd. Oneof the films, made in association with the Educational Foundation for Visual Aids, has been chosen (together with three others ondifferent subjects) for showing at the Brussels Exhibition. The following is a list of the films shown recently to an invitedaudience (three can be borrowed from the Publicity Division of Mullard, Ltd., Milliard House, Torrington Place, London, W.C.I,but those marked here "EFVA" are to be obtained from the Educational Foundation for Visual Aids, 33 Queen Anne Street,London, W.I): The Transistor—Its Principles and Equivalent Circuit, sound, 15 min; The Junction Transistor in RadioReceivers: Part 1, Design of an I.F. Amplifier, and Part 2, The Complete Receiver, black and white, 16 mm, sound, 15 min and10 min; The Manufacture of Junction Transistors, black and white, 16 mm, sound, 10 min; The Principles of the Transistor,black and white, 16 mm, sound, 20 min (EFVA); Semi-conductor Devices, 35 mm, coloured film strip of 31 frames, with commentaryrecorded or in booklet form (EFVA). The Marfax doors at B.O.A.C.'s London Airport Base (see first news-item). In the first picture a Britannia's tail-unit is seen with the doors closed. In the second, an in- terior view, the height-saving is apparent; two entire sides of the servicing bay consist of sliding doors. The third view shows the sealing gasket which surrounds the fuselage. IN BRIEF Twenty-four members of the Imperial Defence College, led bythe Commandant, Gen. Sir Geoffrey K. Bourne, recently visited the Radlett works of Handley Page, Ltd. They inspected Victorproduction, saw the structural test-house and were told about the company's future projects by the chief designer, Mr. C. F. Joy. * * * Mr. H. R. Botting, chief buyer for R. B. Pullin and Co., Ltd.,since 1955 and prior to that production manager, was recently presented with a "21-year service" gold wrist watch by Mr. P. J.Ellis, the managing director. Mr. Botting started with the com- pany in 1937 and, after war service in the R.A.F., became produc-tion manager in 1950. * * * A new cushioning material, claimed to be the most rubber-likesynthetic foam so far developed and expected to have great possi- bilities in the aircraft industry because (weight for weight) it willsupport a greater load than latex foam, has been announced by the Dunlop Rubber Co., Ltd. Described as a polyether foam, itis derived from raw materials obtainable from the petroleum and coal-tar industries. * * * Uddeholm, Ltd., British associates of the Swedish firmUddeholms AB, have appointed Mr. S. A. Comley as London area manager, toqj steel division. He has been the company's todsteel representative for its Birmingham territory during the last five years and will now operate from 6-10 Dean Farrar Street,Westminster, London, S.W.I (tel. Whitehall 9233), his position in Birmingham being taken over by Mr. A. G. Shaw. * * * :., Mr. L. W. R. Robertson, M.I.Mech.E., who has recently been chief of publicity of Sir W. G. Armstrong Whitworth Aircrafti Ltd., and has held various senior executive positions since joining" the organization in 1934, is retiring on account of ill-health. Mr» James K. Corfield, formerly with the Sheffield Telegraph, has beeft appointed publicity manager. fe * * * :.*'• Among awards to be presented by the Radio Industry Councifcat a luncheon on April 10 is one to Mr. E. J. Gargani of ae E.M.I, research department for his article on An AlternatvtColour TV System which appeared in our associated journal Wireless World during August last year. The Council is awardingfive premiums of 25 guineas each for articles published in taft technical Press during 1957. These awards were inaugurated m1952 in order to make British achievements in electronic develop- ments more widely known throughout the world.
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