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Aviation History
1925
1925 - 0013.PDF
Plight, January^, 1925. AIRCRAFT&NGINEEFL First Aero Weekly in the World Founder and Editor : STANLEY SPOONER A Journal devoted to the Interests, Practice, and Progress of Aerial Locomotion and Transport OFFICIAL ORGAN OF THE ROYAL AERO CLUB OF THE UNITED KINGDOM No. 837. (No. 2, Vol. XVII.) JANUARY 8, 1925 ["Weekly, Price 6d.L Post free, 7d. Flight The Aircraft Engineer and Airships Editorial Offices: 36, GREAT QUEEN STREET, KINGSWAY, W.C. 2. Telegrams : Truditur, Westcent, London. Telephone : Gerrard 1828 Annual Subscription Rates, Post Free: United Kingdom .. 30s. id. Abroad .. .. 33s. 0d* These rates are subject to any alteration found necessary under abnormal conditions and to increases in postage rates • European subscriptions must be remitted in British currency CONTENTS PAGE Editorial Comment Rotating Cylinders in Glider Competitions in Russia IS D.H. 50 in Australia 1<S Tests oj Rotating Cylinders : BY F.lliott ('<. Rriil 17 Light'Plane Club Doings 21 British Air Mails in 1924 1 Society of Model Aeronautical Kngineers Kt-se.ir. h Competition .. 22 Royal Air Force 3 R.A.F. Intelligence 23 Air Ministry Notices .. .. .. .. .. .. .. .. 24 Personals 4 DIARY OF FORTHCOMING EVENTS Club Secretaries and others desirous of announcing the dates of important fixtures art invited to send particulars for inclusion in the following lift :— 1925 Jan. 9 Mr. R. J. Parrott, Hons. Member : " The History and Evolution of the Avro Training Machine," before I.Ae.E. Jan. 22 Major R. V. Southwell, A.F.R.Ae.S. (Super- intendent, Aerodynamics Department, National Physical Laboratory) : " Some Recent Work of the Aerodynamics Department, N.P.L." Jan. 23 ... Lieut. N. A. Olechnovitch, Member : "A Few - Experiments with Shock-Absorbing Hulls for Plying Boats," before I.Ae.E. Feb. 5 Air Commodore C. R. Samson, C.M.G., D.S.O., A.F.C., A.F.R.Ae.S. : "The Operation of Flying Boats in the Mediterranean," before R.Ae.S. Feb. 6 Professor E. G. Coker, D.Sc. F.R.S. : " Photo- Elastic Methods of Measuring Stress," before I.Ae.E. Feb. 12 Colonel F. Searle : "The Maintenance of Commercial Aircraft," before R.Ae.S. Feb. 19 Lient.-Col. L. F. R. Fell: "Light Aeroplane Engine Development," before R.Ae.S. (Society of Arts). Feb. 20 .... Mr. H. L. J. Hinkler : "Flying in Australia," . before I.Ae.E. EDITORIAL COMMENT. FEW weeks ago we referred to the " rotor ship " of a German inventor, Herr Anton Fletlner, in which large vertical cylinders, rotated by auxiliary engines of relatively low power, were employed to increase the propelling power of the wind, the effectiveness of the rotors being considerably greater than that of ordinary sails. We suggested at the time that such rotors might conceivably be adapted for R t f use on aircrart> as i* appeared that the Cylinders ^rt obtainable was far in excess of that produced by any known wing section. In a subsequent issue of FLIGHT we published a diagram showing a suggested method of testing a rotor on a light 'plane in order that the principle of the rotor might be explored at relatively low cost. We have now received, from Mr. G. W. Lewis, Director of Aeronautical Research in the United States, copies of a report on tests carried out in the 5-ft. wind tunnel at the Langley Memorial Aero- nautical Laboratory on rotating cylinders, and ex- tracts from this report are published elsewhere in this issue of FLIGHT. AS far- as we are aware, this is the first time authentic results of such tests have been published, and as the subject is one of very considerable interest—not impossibly to aeronautics —we are naturally very gratified to be able to place before our readers the results contained in Technical Note No. 209 of the American National Advisory Committee for Aeronautics. Incidentally, the issue of this document is one further proof of the prompt- ness and thoroughness of American methods, and is in striking contrast with the tardy manner of issuing British Reports and Memoranda. These American Technical Notes are not set in type, as are our reports and Memoranda, but are " Roneoed," the illustrations being either produced by the same method, or in some cases in the form of blueprints. While, it is true, limited copies only can be produced, in this manner, they can certainly be produced very quickly, and where the subject is one of immediate interest, or of an urgent nature, these Technical Notes are prepared, pending the issue of fuller reports. To show the rapidity with which information can be,
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