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Aviation History
1938
1938 - 1067.PDF
APRIL 21, 1938. ADVERTISEMENTS. FLIGHT. 5 Unfaicate andaccurate Roughing out cooling fins on radial aero engine cylinder from steel forging under quadruple feed of COOLEDGE i in 20 emulsion on Churchill-Fay automatic lathe—courtesy Armstrong-Siddeley Motors Ltd., Coventry. Intricate and accurate — both words can fairly be used to describe the majority of jobs which a production engineer has to tackle in aircraft machining operations. The operation shown is typical — cylinder finning from the solid forging pro- vides an unusually high ratio of weight-removed to finished weight, yet the Atmstrong-Siddeley engineers are more than usually proud of the accuracy of the final result of this operation, in which COOLEDGE is used to facilitate heavy removal of material while preserving accuracy of finish. COOLEDGE water soluble cutting oil remains stable up to extreme dilutions and will not cause rust on fine finish nor gum up the machine slides. Make a test for yourself by writing for a free sample of COOLEDGE — business heading please. ATTENTION.—Here are some of the British aircraft firms using Fletcher Millercutting media—Alvis Ltd., Arrow Aircraft Ltd., Sir K< G., Armstrong Whitworth ^Aircraft) Ltd., Airspeed Ltd., British Marine Aircraft Ltd.. British Salmson Aerof^1"" L'd., deHavilland Aircraft Co., Ltd., Handley Page Ltd., Hawker Aircraft ' F£'rey Aviation C Ltd Glt Aift Ltd Phillips & Poms Aircraft5' p£trey Aviation Co., Ltd., Glostcr Aircraft Ltd., Phillips Pom'si-'a-y Pobjoy Airtnotors Ltd., A. V. Roe & Co., Ltd., Supermarine Aviation " 5T*'(f'fAers) Ltd., Vickers (Aviation) Ltd., and most of H.M. Governmentanaaott) Factories. Aircraft machining needs COOLEDCE water soluble cutting oil ^ Manufacturers : ^ETCHER MILLER LTD., DUKINFIELD, NR. MANCHESTER, ENG. "BESTOBELL (Regd. Trade Mark) PRODUCTS FOR CIVIL and MILITARY AVIATION Specialise in Fire Protective Clothing for the Pilot. The illustration depicts the Regulation Flying Overalls reproduced in the finest weave Asbestos Cloth, ensuring warmth, comfort and durability, and providing a degree of Fire Protection which would prove invaluable. Helmet and boots are of the same material. HEAD OFFICE: SLOUGH, BUCKS Telephone : Slough 830 (4 lines).Telegrams : Btslobell, Slough. CnoUlUKinQ London Office : ly fcmfat 7, Victoria Street, s.w.i Branches: Birmingham, Bristol, Cardiff, Glasgow, Hull, Leeds, Liverpool, Manchester, Newcastle, Nottingham and Overseas.
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