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Aviation History
1937
1937 - 0111.PDF
JANUARY 14, 1937. FLIGHT. 45 THE INDUSTRY In Search of Safety : At the B.I.F. r Lowering Riveting Costs : Echo Sounding Crash-proof Tanks AFTER some thirteen years work in conjunction with the Air Ministry, the Henderson Safety Tank Company now his a product which has passed extensive tests in the hands of the Ministry. This tank, it is stated, is "crash-proof," rivetless, rust-proof and easily interchangeable, and weighs j lb. per gallon. The tank, which has been tested in a Hawker Hart, will shortly be available, and it is probable that it will be adopted for some of the new airline types upon which the reduction of fire risks is so important. About Plugs ALSO available in the French language, a detailed list of aircraft sparking plugs, both screened and unscreened, has been issued by Lodge Plugs, Ltd., Rugby. Fifteen differ ent types are dealt with, and a recommendation chart for forty makes of engines, British and foreign, is included. Making it Clear THE recent publication in Flight of a photograph of Prof. Piccard's transparent balloon raises an interesting point, namely, that all is not Cellophane which can be seen through. In other words, "Cellophane" is a registered trade name describing the product of British Cellophane, Ltd.. 179, Totten ham Court Road, London, W.i, and not just any transparent cellulose sheeting. Entente Cordiale IT is, perhaps, not generally known that a licence to manu facture the well-known French aircraft components bearing the name of Messier is now held by the Messier Aviation Engi neering Co., Ltd., of 175, Piccadilly, London, W.i, and Kings- wood, Bristol. A very informative catalogue (at present in French) deals with the Messier undercarriage—which was described in detail in The Aircraft Engineer supplement to Flight of December 31—wheels, brakes and variable-pitch air screws. At the B.I.F, pDGAK ALLEN AND CO., LTD., of Sheffield, have taken •" a stand at the forthcoming British Industries Fair, Castle Bromwich, for the purpose of displaying for the first time their "Stag Allenite " range of tungsten-carbide-tipped tools. Other products of the same firm which will be shown on this stand are " Stag Major Supenveld " tools, " Stag Major " and Stag Extra Special " hardened and ground tool holder bits and die steels. The stand itself will embody a considerable number of plates of " Maxilvry " stainless steel. V. P. Airscrews ]yjK H L. MILNER, who designed the throttle-operated v.p. airscrew descibed in Flight of December 3, 1936, s not, as some appear to think, actively connected with the owners of his design, V.P. Airscrews, Ltd., of Cheltenham, \vitl 1S \ y emPlo>"ed by the Bristol Aeroplane Co., Ltd., ! |vhorn ne has been lor some years engaged on airscrew Glost IStfWy il! connection with the development of the bepi "• Shaw Beacham v.p. airscrew which has recently giving such a good account of itself on tests. Piston-ring Service WELLWORTHY PISTON RINGS, LTD., announce the Liver, "'V1111^ of new service depots at 45, Renshaw Street, no ; °n Decem'>er 7 (telephone, Royal 5786) and at 2J<m u"nstone Road, London, E.15 (telephone, Maryland 2 4J9) on November, 19. P new"0! 4ntally' the flrm has now Protluced a most impressive D '-page catalogue of its piston rings, cylinder linings. Ryland Expansion LLEWELLYN RYLAND, LTD., state that owing to the greatly increased home and foreign demand for their air craft finishes, "Rylard," "Ardack," " Duralac," etc., they have for the second time within twelve months been compelled to increase the number of grinding and storage shops at their Balsall Heath, Birmingham, works. The new shops are being fitted with the most modern machinery, so that they will be in a position to more than double output in 1937. The research and testing departments are also being added to. Cheaper Chobert Riveting IT is announced by Aviation Developments, Ltd., Argyle House, Euston Road, London, N.W.i, licensees for the Chobert riveting system, that, following negotiations with the French licensors, they are able to make big reductions in their charges, as follows :— Price of rivets reduced from 40s. per 1,000 to 28s. gd. per 1,000. Hiring charge on machines reduced from £25 p.a. to the nominal one of £1 to retain it as their own property. Repair clause in agreement to be abolished when repairs are carried out in constructor's own works. Removal of other restrictive clauses. It is stated that the Chobert system is now cheaper in this country than in any others, but it is hoped to secure still further reductions if sufficient support is received from the aircraft industry. The system was described in Flight of August 6, 1936. A New Echo Sounder ANYTHING intended to make flying safer is always wel come. The idea of measuring distance by echo is very old, and for many years soundings have been taken in shipping by the echo method. Two years ago Flight published a brief description of the French Dubois Laboureur acoustic altimeter and at that time the Marconi company was experimenting along the same lines. At the Physical Society's Exhibition at the Imperial College of Science, South Kensington, last week, a further new acoustic altimeter was shown by Henry Hughes and Sons. The apparatus is still in a rather experimental stage and has not yet been tested or installed in an aeroplane. The principle is orthodox. A note is emitted from a source on the aircraft and the echo from the ground is picked up by a microphone." COMMERCIAL AIRCRAFT and AIRPORTS X TEXT week's issue of FLIGHT, appearing during • ^* the Airports Exhibition, will be a Special Number devoted to Commercial Aircraft, Airports and their Equipment. The contents of this enlarged issue will include articles by experts on such subjects as Airport layout, operation and lighting; a review of current British Commercial Aircraft: maps showing British Airports and European Air Routes; and a sectionised guide to the products of the fifty exhibitors at the Exhibition.- val valves ptr • l — f"'"» »">&-&gt;> vvimuci iiimiga, I ea„h ' . "7' a feature is the fact that the code number of stand-,,-1 1S comP°sed of the actual size of the ring, either ,Uard or oversize. 6 Next Thursday January 21
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