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Aviation History
1913
1913 - 0317.PDF
Flight, March 22, 1913. 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. 221. (No. 12, Vol. V.)] MARCH 22, 1913. ["Registered at the G.P.O.T rweekly, Prioe 3d. L at » Newspaper. J [ Poat Free, 8W. Flight. Editorial Office: 44, ST. MARTIN'S LANE, LONDON, W.C. Telegrams: Truditur, Westrand, London. Telephone: Gerrard 1828. Annual Subscription Rates, Post Free. United Kingdom ... 15/. od. Abroad »ox. ad. CONTENTS. Editorial Comment: The Air Service Vote The Science of Model Research Modern Tuition ... Things We Should Like to Know Men of Moment in the World of Flight: Mr. W. O. Manning Teaching Flying. By Lewis W. F. Turner Questions in Parliament The Government and Aviation The Laws of Similitude. By L. Bairstow Some Automatic Stability Patents. By E. M. Green... •Nature's Aeroplanes. By E. F. Andrews Royal Aero Club Dinner A Study in Tails From the British Flying Grounds Armchair Reflections. By the Dreamer Foreign Aviation News Models. Edited by V. E. Johnson, M.A Correspondence 3»3 3*3 ,-•) ;*4 ps yli 3*8 12 • 33° 333 "ii 337 33* ;•*• 34 •44 34" 347 JOMTOR3A1, COMMEHT. Col. Seely's memorandum on the Army .. ^he . Estimates, including a statement of the sum Vote. allocated for military aviation, is published as we go to press and is included in this issue, but it makes its appearance too late for comment, and in any case we should wish not only to hear Col. Seely's explanation of the situation in Parliament, but also to hear the First Lord's statement concerning the air service in his department before commenting upon so important a matter. The Science of Mode! Research. We draw attention to a paper on the law of similitude, which Mr. L. Bairstow read before the Aeronautical Society recently, published on another page, as it is one that should be perused studiously by all readers of FLIGHT. It will be the easier for those not commonly interested in scientific discussion to do this for the reason that it is one of the best written papers that has yet come into our hands. Delivered in simple language it goes straight to the point in the least possible space, and it does so by the aid of a few analogies that serve to provide the reader with just that breadth of view that is so essential to a proper appreciation of such p subject. For reasons that are obvious, it is impossible to conduct highly elaborate research on full sized aeroplanes, yet without question it is of the greatest importance to know the detailed behaviour in flight of the various members of which the machine is composed. Obviously this investigation can only be carried out on a reduced scale, and the point to which Mr. Bairstow draws attention in his paper is that there are certain very important laws connecting small scale experiments with the behaviour of full scale machines. It is clearly necessary for those who make small scale experiments to understand these laws, but it is also necessary that their importance and general nature should also be appreciated by all who make full sized aeroplanes. Not less is it desirable that the existence of the laws of similitude should be borne in mind by those who encourage themselves to take an interest in aviation by the flying of model aeroplanes. As the author's paper itself is the clearest possible exposition of the subject with which it deals and is brief besides, we do not propose to summarise it here, but the present is, nevertheless, a fitting opportunity to pass a remark or two in appreciation of the work that Mr. Bairstow and his colleagues, Messrs. F. H. Bramwell, Harris Booth, J. H. Hyde, B. Melville Jones and others who are on the staff of the National Physical Laboratory, have accomplished. In their hands is the conduct of the actual aerodynamic research at the N.P.L. and the Technical Reports of the Advisory Committee bear good evidence that they make active use of their time. The Technical Report of the Advisory Committee has become what one might call the standard text-book for aeronautics in the English language, and it is a publica tion of the highest possible quality. Many of the memoranda contained therein have been prepared by those whose names have above been mentioned, and the practical value as well as the general interest of the Technical Report gains immensely from the care and lucidity with which this written matter has been compiled. Too often, those who are actively engaged in the conduct of practical work, whether on a full scale or a small scale, find some difficulty in making their chain of logic complete for the general reader when they come to report their conclusions for his benefit. li 2
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