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Aviation History
1920
1920 - 0777.PDF
~ JULY 15, 192a and Battersea and Amber gear oils for gear-boxes, bevel-driven gears and worm drives. Ripaults, 11, King's Road, St. Pancras, N.W.i. (STAND 31) ON this stand is a display of Oleo ignition plugs, especially those which have been specially pro- duced for aviation work. The three aviation plugs are now known as Nos. 78, 67B and 68. The first-named is for stationary engines, and has a body of brass highly machined for cooling, the insulation of large- diameter mica. It weighs 3J oz. The 67B has been designed to meet the requirements of high-efficiency rotary engines. Its extremely short and light body and short overall length eliminate any tendency to cylinder distortion, or distortion of the plug itself. The insulator is a gas-tight taper fit, automatically tightening under centrifugal force. The steel body is specially drilled for cooling, and offers minimum resistance. Weight, i£ oz. The 68 is designed for use on either rotary or radial engines, and is similar in its construction to No. 67B, with the exception that the body is longer and machined to give extra cooling for radial work. Weight, 3 oz. The Robinhood Engineering Works, Ltd., Putney Vale, London, S.W.15. (STAND 98) BOTH " K.L.G. " plugs and " K.L.G." precision tools are ex- hibited, as well as some of the actual plugs used by Mr. H. Hawker for his famous transatlantic flight attempt— the plugs, by the by, having been recovered from the Atlantic. Replicas of the various types of " K.L.G." plugs used in the engines of the ma- chines which achieved the Atlantic flight—the flight to Australia and the Cape to Cairo flight are shown, and there is also on view similar plugs to those which were used in the five Sunbeam-Coatalen Maori engines of H.M. airship for its double journey across the Atlantic. Appealing to the popular mind are some specially prepared sections of various types of aero plugs, including those of the most recent design, specially mounted and arranged with a lighting effect which shows the composition of the insula- tion in an entirely novel manner. Rubery Owen and Co., Darlaston, Staffs. (STAND 81) AMONG the exhibits on this stand | are Rubery Owen and Co.'s patent s release gears, Foxe's patent wire- • bending pliers, metric turnbuckles, s Wiley's patent parallel jaw hand vice, A.G.S. special turnbuckles, ordinary turnbuckles, eye-bolt and nuts, all- steel turnbuckles, Hex. Rd Hex. bolts and nuts, special bolts and nuts, special small parts turned from the bar, engine bearers and other pressed steel parts for aeroplanes, all-steel spars and struts, all-steel propeller made-fp in layers of sheet steel, corrugated sections for spars and struts in special high tensile steel, sketches of sections herewith. Serck Radiators, Ltd., Greet, Bir- mingham. (STAND 30) ON this stand is found an in- teresting display of aeroplane and airship radiators, also brass and copper tubes manufactured by the firm. The works are self-contained, manufac- turing the whole of the radiator from the tube upwards, and at the present time experiments are being carried Group of Serck aeroplane radiators out in connection with the manu- facture of oil coolers for airships. The large tube mill erected by the Government during their occupation is now being opened to facilitate in- creased production. In addition to the round honeycomb tube, Serck, Ltd., are in a position to supply light gauge tubing for other purposes. Shell Marketing Co., Ltd., 39-41, Parker Street, W.C. 2. (Stand 96.) SHELL Spirit in the familar red cans, Shell Aviation in the gold cans, typifying the incomparable quality of the spirit, and grey cans for the com- mercial grade of Shell (sold under the name of Crown Motor Spirit), are the chief exhibits. At this stand are to be seen reproduc- tions in sterling silver of the Vickers- Vimy Rolls-Royce aeroplanes upon which the late Capt. Sir John Alcock flew from the new world to the old, and useful tool for dealing with wire : Foxe's patentbending pliers made by Rubery, Owen and Co. Capt. Sir Ross Smith, from London to Australia—both aviators using Shell Aviation Motor Spirit exclusively. It is noteworthy that all four £10,000 prizes for aviation have been won on Shell Aviation Spirit. The same spirit was used in the great flights across Africa and from Rome to Tokio. Diagrams and charts of general interest are being shown, together with specimens of various types of crude oils and their derivatives, also bitumen —which is of particular interest to the motorist in respect of its use in road construction. " The Story of Oil" and " Miles and Sterling" are two books which visitors will find interesting. Simms Motor Units (1920), Ltd., Percy Buildings, Gresse Street, W. 1. (STAND 75) VARIOUS patterns of H.T. mag- netos and a display of sparking plugs are on view, while other specialities are the magnetic petrol guage and the flexible " Vernier " coupling for mag- netos. The magneto is in two pat- terns—one for four and the other for six-cylinder motors. The petrol gauge, it may be recalled, consists offa float, Simms "Vernier" coupling which as it risesor falls,moves a magnet, which in its turn operates the hand indicating the amount of petrol in the tank. The Vernier coupling is an ingenious device which enables the timing to be varied as fine as Tnrath of a revolution, while the flexible connection enables the coupling to correct any mis-alignment between the engine shaft and the magneto arma- ture. Skefko Ball Bearing Co., Skefko Works, Luton. (STAND 87) MANY examples of Skefko bearings are displayed at the Skefko stand, including several patterns of the famous Skefko double-row self-align- ing radial bearings. Two interesting contrivances are to be seen at this stand—a bouncing ball apparatus, and a bent shaft model. The former con- sists of a circular anvil on which steel balls, shot to a considerable height by an electrical apparatus, continue to bounce for what seems an impossible length of time. The elasticity of these balls—standard balls for Skefko bear- ings—is a proof of the thoroughness of the hardening process to which they have been subjected. The other model consists of a bent shaft running in two Skefko self-aligning bearings. When the shaft is set in motion by a small electric motor one can see the way in which the bearings align themselves to the deflections of the shaft without any increase of friction. A new Skefko production, the split belt pulley, will also be shown. As well as a variety of housings for Skefko bearings used in connection •M:. 777 It
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