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Aviation History
1928
1928 - 0960.PDF
22 OCTOBER II, 1928 " snowboards "—(a) A dashboard, such as would be fitted to a large commercial machine, showing a complete range of Smith " Aero Instruments, (b) A smaller instrument board suitable for a light 'plane. (c) Two shields showing a range of " K.L.G." ignition plugs. Some Aperiodic compasses are also shown. The instruments shown on the large dashboard include the following :—Two type Av. 508 revolution indicators, of the small square flange type, with flexible drive. Two type AA. 437 oil thermometers and two AA. 437 water thermome- ters. One type AA. 725 cross level, or lateral clinometer. One type AA. 541 air speed indicator. One type Av. 563 altimeter. Type AA. 731 fore and aft level (longitudinal clinometer). Regarding the revolution indicators, it may be of interest to note that these have been fitted in a Dornier Wai flying-boat by Aviolanda Papendrecht of Holland, in place of indicators of the electrical type. They have proved entirely satisfactory, in spite of the long flexible drive (8-2 m. and 9-2 m.), which functions faultlessly—Capt. Courtney's Atlantic Dornier was so fitted and the Av. 508 revolution indicators have given 50 hrs.' service without the slightest trouble. The light 'plane instrument dash includes the following instruments : reading from left to right in our illustration : Type Av. 572 altimeter (dial diameter, 3 in. ; weight, llf ozs.). Type Av. 508 revolution indicator (dial diameter, 3^ in. ; weight, 28 ozs.). Type Av. 546 air speed indicator (dial diameter, 3& in. ; weight, 16 ozs.). Type AA. 407 oil pressure gauge (diameter, 2 in. ; weight, 8^ ozs.). At bottom, Type AA 725 cross level weight, 3J ozs.). " Smith's " aero instruments are not unknown in Germany, for a number have, from time to time, been supplied to various firms. They have a world-wide reputation for efficiency and reliability, and S. Smith and Sons are con- stantly experimenting with new types at their Cricklewood works. For instance, they have recently produced two interesting instruments—an air speed indicator which registers to 400 m.p.h., and a revolution indicator which registers up to 4,500 r.p.m. " K.L.G." plugs—of which a full range is exhibited—need no other reference here other than they are being supplied to several leading German air companies, including Deutsche Luft Hansa, A.G., Junkers-Flugzeugwerk, A.G., and to the makers of the " B.M.W." engine. Imperial Airways, Ltd.—The exhibits of Imperial Airways have not been placed to great advantage at the exhibition, being separated from the rest of the British section and from the main hall by high partitions. Then their exhibits are not up to the standard expected. They have an Argosy fuselage " mock-up " and models, booklets and statistics, etc. The Armstrong-Whitworth " Argosy "is the large cabin air liner used extensively by Imperial Airways. It is fitted with three Armstrong-Siddeley " Jaguar " 385-425 h.p. air-cooled engines. It carries 20 pas- sengers, crew, and luggage, has a cruising speed of 95 m.p.h., top speed near ground of 109 m.p.h., a range in still air of 340 miles, and a ceiling with full load of 11,000 ft. Wing span is 90 ft., length 64 ft. 6 in., and height 19 ft. Wing loading is 9-5 lb. per sq. ft. and power loading 15 lb. per h.p. Maximum loaded weight is 18,000 lb. and paying load 4,500 lb. The " Argosies " have given great satisfaction on our London-Continental air lines during their long service. The Palmer Tyre, Ltd.—There is a complete range of Palmer wheels and tyres, and also a quite new wheel brake for aircraft, pneumatically operated. Palmer wheels and tyres have played a notable part in the history of aviation. During his recent flight to India Capt. C. D. Barnard had his Fokker monoplane standing in the heat of the Persian Gulf for two months, and despite this and eight take-offs and one forced landing with the tremendous load, the Palmer tyres were in such perfect condition at Karachi that it was decided to discard the spare wheel for the fast return flight, which had been untouched since the start from England. C.C.Wakefield and Co., Ltd.—Castrol is a household word wherever aviation or motoring is followed. It has played its important part in innumerable historical flights. It is used the world over, and has been for a decade. C. C. Wakefield and Co., Ltd., are exhibitors at Berlin with their products. I I.L.A. FROM ABOVE 890
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