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Aviation History
1940
1940 - 0232.PDF
88 JANUARY 25, 1940. Electric motor ior wind tunnel modelsby Aviation Corporates Ltd. Timken Appointment M R. R. TURNER HOOD who has forsome while held the post ol chiet Scottish sales representative for British Timken, Ltd., the roller and ball-bear- ing concern, has now been appointed chief of the mechanical engineering department of the company. Mr. Hood started his career by serving his ap- prenticeship with Barr and Stroud, Ltd., the Glasgow manufacturers of marine and aeronautical precision instruments. Luxor Goggles TJX3R those who want real eye comtoit -»- whilst flying, E. B. Meyrowitz, Ltd., the Old Bond Street opticians, have made special provision in their model No. 6 Luxor. In addition to all the usual good fea- tures associated with Luxor goggles No. 6 is fitted with hand ground, laminated and prism corrected lenses. These lenses, not being of synthetic material, will stand up to severe usage and, in addition, may be had in various tints which are useiul when flying in brilliant sunshine and of some advantage in fog. No. 1a, Old Bond Street, W.i, is the address for further details. Tunnel Model MotorsI N his Wright Brothers lecture, on the influence of running airscrews on aeroplane characteristics, Dr. Clark B. Millikan drew attention to the recent spectacular increase in wing loading with the accompanying decrease in power loading. At the same time he remarked on the increased percentage of the wing area affected by the slip stream owing to' the four-engined installation becoming more widely used. His point was the difference between eugine-on and engine-oil flying. He went on to explain the apparatus used at the Guggenheim Aeronautical Labora- tory to study this effect in the wind tunnels. He spoke of small electric motors used on models of about 7ft. span capable of running up to 18,000 r.p.m. Aviation Corporates, Ltd., in- form us they are agents in this country for the manufacturers who are specialists in producing this type of electric motor to almost any specification. Obviously almost every "engine" is a " one off " product but among others they have already produced a 4-6 h.p. model running at 15,000-18,000 r.p.m. for an overall size of 6|in. by 3fin. for THE INDUSTRY Boeing and for Lockheeds, a jO-40 h.p. model running at 10,800 r.p.m. which is designed to duplicate an "in line" type of engine. This motor measures only 4 Jin. by i8in. Aviation Corporates, Ltd., whose address is 50, Pall Mall, London, S.W.i, will furnish any further particulars that may be required of these specialised model motors. Macrome UnlimitedI N the midst of a world of cancelled or reduced advertising and dismissed travellers we commend the policy of Macrome, Ltd., of Hay Mills, Birming- ham, whose slogan "The Toughest Tools in the World ".has been amply proved by many internationally known companies. They are showing toughness of another kind by their policy of in- creased advertising, by which their advertising department has been ex- tended and the staff increased. Hangar-Tarmac Sweeper (~\RIGINALLY developed for muni- ^S cipal use, the Lewin hand-controlled power-driven sweepers are being found of increasing use in aeroplane factories, hangars and aerodromes. A model specially modified to comply with Air Ministry requirements is now in produc- tion. The Lewin sweeper-collector machine is built in widths of from 3ft. to 5ft. and is driven by a Villiers fan-cooled two- stroke engine of 249 c.c, transmission to the axle being by chain through a large countershaft plate clutch. The rotating brush is set at a slight inclination to the line of travel and is accordingly shaft driven through angle gears and a uni- versal shaft from the axle. To facilitate sweeping close up to walls or kerbs the brush overhangs the body of the machine some 4m. on the near-side. A collector-box ot jj cu. ft. capacity is arranged in front of the brush and this can be tipped by a lever from the control position. Clutch and throttle are operated irom the near-side handle grip and for use in aircraft establishments the clutch is so arranged that the machine will stop if for any reason the operator releases his hold. A sweeping speed of 2 to 3J in.p.h. is within the control of the operator and 5,280 to 8,800 sq. yds. can be covered in the hour. An idler wheel in front ensures constant brush pressure for which there is also an independent setting. When necessary a water-sprink- ling apparatus can be installed. • The brushes fit interchangably tin to a square shaft and can be rapidly replaced or re- arranged to compensate for uneven wear; each brush assembly consists of four or more sections according to (he width of the machine. The makers are Lewin Road Sweepers, Ltd., Shakespeare St., Southport. An example of the well-known Oddie fastener. Oddie Fastener DESIGN departments are referred to abooklet, which is being issued by Oddie, Bradbury and Cull, Ltd., the makers of the Oddie fastener, in which different models and typical applications are illustrated and described, complete with installation diagrams. The Oddie fastener is too well known to need a detailed description, but the advantages are that it is simple (only three parts), positive (load tends to lock the fastener), has a resilient mounting (to eliminate chattering), and is water- tight. The booklet, is called "The Oddie Fastener," and may be had from Oddie, Bradbury and Cull, Ltd., The Airport, Southampton. Latest model Lewin sweeper-collector for aerodrome service. I
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