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Aviation History
1920
1920 - 0772.PDF
The Bournemouth Aviation Co.,Ltd., Aerodrome, Ensbury Park, Bournemouth. (STAND 37) ON this stand is found litera-ture advertising the Bournemouth School of Flying, etc., together witha number of interesting photographs. Particulars will also be availableregarding the firm's arrangements for commercial flying, joy rides, etc. British Cellulose and Chemical Manufacturing Co., Ltd., 8, Waterloo Place, S.W. i. (STAND 25) THERE is an array of specimens of cellulose, acetates, and bye-products on view, as well as samples of Govern- ment and Novellon dope. Those who are technically interested will be able to make comparisons between speci- mens of doped fabric on frames executed to approved doping schemes. Another item will be an explanatory chart showing the stages in the manu- facture of cellulose acetate, with speci- mensjof raw materials, etc. The British Thomson-Houston Co., Ltd., Rugby. (STAND 6) ON this stand are seen several patterns of the polar inductor type magnetos for aircraft work. The A.V. 12 type was used on the airship R. 34, which made the double crossing of the Atlantic. This type was de- veloped originally for use on the 9-cyl. radial-engine of the Dragonfly type, and it has also demonstrated its efficiency on the Jupiter 9-cyl. engine. Like the A.V. magneto, it is of the polar inductor type, provided with a standard armature and condenser, the straight-through, non-magnetic steer- ing shaft carrying a rotating member to which four iron inductors are attached. The British Wright Co., 9, Galen Place, Bury Street, W.C. 1. (STAND 83) ONE of the most interesting of the many instruments on view here is the Darwin turn indicator, invented by Sir Horace Darwin. It consists of two static tubes situated respectively JULY 15, 1920 telegraphs, tension meters, radiator thermometers, oil and air pressure gauges, moisture testing sets, lighting dynamos, lamps, sparking plugs, pumps of various types, parachutes, propellers, petrol taps and unions, celluloid liquid glue, shock-absorbers, and last, but not least, mascots in considerable variety. Bullivant and Co., 72, Mark Lane, E.C. (STAND 18) THIS firm are exhibiting their specialities in the form of round steel wire cords, flat steel wire ropes, and round steel wire strands for aircraft, as well as ropes and cords for construc- tional purposes, slings and gears for lifting, etc. They are making a feature of the aeroplane control cable which has been so generally used on War machines. It is a four-stranded cable, of which some 8,383,000 ft. have been produced. Bruntons, Musselburgh, Scotland. (STAND 28) SAMPLES are shown ef stream- line wires, tie rods, universal and plain The Darwin turn indicator, made by the British Wright Co. On the left the Ogilvie pressure gauge which indicates the turn, and on the right, one of the swivelling static tubes The BritishlEmaillite Co., 5, HytheRoad, Cumberland Park, Willesden. (STAND 76) THE various stages of the three Emaillite doping schemes, " X " for use on aeroplanes and seaplanes and tropical service, " B " for use on stan- dard type aeroplanes, and " S-M " for use on aircraft for school and training purposes, are shown together with the Emaillite airship doping scheme " P," as used on the R. 34, and it is claimed that it is still unsurpassed, weight for weight. Among the protective materials for aircraft on view are the T.O.V. transparent; P.O.V. khaki, red, white, blue and black ; varnish for internal woodwork ; varnish for external wood- work; air-drying black enamel; battle- ship grey ; white dope resisting paint; transparent wood filler; paints for motor transport vehicles; and Emaillite superfine varnishes and enamels for the interior decoration of aeroplanes and airships, cabins, saloons, etc. Other exhibits include: G.A.C. aero propellers, G.A.C. aero components, G.A.C. aeronautical instruments. on the port and starboard extensions of the wings, with an Ogilvie pressure gauge mounted in front of the pilot. ; By this combination the hand of the | gauge is caused to point to right or left, showing the direction in which the f aircraft will turn. Each static head is f free to swivel in all directions, so as 5 to adjust itself by reason of its wind-- j vane, and maintain its alignment withj the varying direction of the wind. t Brown Brothers, Ltd., Great Easterns Street, E.C. 2. (STAND 7) f ; " SOMETHING for everybody "\ I might be the motto for this stand,1 ! which has on it a most compre- hensive display of accessories, fittings, instruments and appliances having some connection, close or remote, with aeronautics. There is electrically- heated clothing, various patterns of I helmets, goggles, safety belts, etc. j steering wheels, levers and other control I mechanisms and carburettors, while % among the instruments may be men- I tioned aneroids, air speed indicators, ; air release valves, compasses, levels, \ pressure gauges, switches, revolution counters, volt and ampere meters, . Abney levels, incidence gauges, airship 'f> -: ... 772 fork joints, " Army " and " Ad- miralty " types ; also Bruntons' own " B.R." universal fork, a lighter design than the " Army " type, which is intended as an alternative; also*trun- nions, lock-nuts, pins, locking plates, turnbuckles and steel wire cable for airships and aeroplanes ; wire spokes, sparking plug parts, etc. It is claimed that among the advantages of " Stream- line " wires and tie rods of high strain with screwed ends for exterior and interior bracing of aircraft are : The wind resistance is considerably less than that of a cable suitable for carry- ing the same load. The increased speed when flying, as compared with cables, is estimated at 7 to 15 m.p.h. when flying at or about 100 m.p.h. The stretch of " Streamline " wires is ' less than that of cables subjected to the same working load. The adjust- ment is much greater than can be obtained on cables, and can be more readily and speedily fitted by an ordinary rigger or mechanic. Some of •the exhibits are covered with anti- corrosion coatings by " Bruntonising," electro - galvanising, cosletising or electro-plating. All classes of high.
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