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Aviation History
1927
1927 - 0333.PDF
Flight May 19, 1927 AIRCRAFTENGINEER^ 6s> First Aeronautical Weekly in the World. Founded January, 1909. 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. 960. (No. 20, Vol. XIX.) MAY 19, 1927 [Weekly, Price 6d.L Post free, 7d. Flight The Aircraft Engineer and Airships Editorial Offices: 36, GREAT QUEEN STREET, KINGSWAV, W.C.2. Telephone : Gerrard 1828. Telegrams : Truditur, Westcent, London.Annual Subscription Rates, Post Free. United Kingdom .. 30s. id. Abroad .. .. 33s. (id.* ' Foreign subscriptiutts must he remitted in British currency. CONTENTS Editorial Comment: R.Ae. Soc. Milestone .. .. .. .. .. .. .. 301 TheH.A.P 302 The Royal Tournament .. .. .. .. .. •• 285 The Flight Towards India.. .. .. .. .. .. .. 3<i3 Hampshire Air Pageant .. .. .. .. . . . . .. 305 Royal Aero Club Official Notices.. .. .. .. .. .. 31o The Airship Club 3lo Gordon Bennett Balloon Race . . . . . . . . . . . . 3lo Whitsuntide Racing at Bournemoull' .. .. .. .. •• 310 Metal Construction .. .. .. . . . . . . . . . . 311 Private Flying .. .. .. . . . . .. .. .. 312 light'Plane Clubs •• 315 Airisms From The Four Wind? .. . . .. .. .. .. 316 Aerial Survey: By Maj. H. Hemming .. .. .. .. .. 317 The Wilbur Wright Memorial Lecture 31S Royal Air Force 319 Air Ministry Notices .. .. .. .. .. .. .. 319 In Parliament .. .. . . . . . . , . .. . . 320 Imports and Exports . . . . . . . . . . . . . . 32n ** FLIGHT " PHOTOGRAPHS. To these desirous of obtaining copies of "Flight" Photographs, these can be supplied, enlarged or otherwise, upon application to Photo. Department, 36, Great Queen Street, W.C.2 For Sizes and Prices, see Advert., page xxiv. DIARY OF FORTHCOMING EVENTS Chib Secretaries and others desirous of announcing the dates of important fixtures are invited to send particulars for inclusion in this list:—1927 May 19 .... Aero Golfing Soc. (FLIGHT Cup), Addiugton. Mfty 19 .... The Royal Tournament, Olympia May 23 .... " steels tor Aircraft," Sir Robert Hadfleld, Bart., before Inst.Ae.E. Inst.Ae.E. Visit to the National Physical Laboratory, Teddington, Middlesex. Fourth International Aero Exhibition, Prague. Inst.Ae.S. Visit to Croydon Aerodrome.R i, Force May 25 . Jtine*-16. •u°e 18 . 2 EDITORIAL COMMENT. OR the first time in the history of the Royal Aeronautical Society of Great Britain the Wilbur Wright Memorial Lecture was given, on Ma ' 16, by a lec- turer from other than Anglo-American circles. The honour of giving the first non-English and non-American Wilbur Wright lecture fell to Dr.^ Prandtl, of the Gottingen University of Berlin, and indeed it would have been difficult to find a man with greater claims to this honour. The work of Prof. Prandtl on modern aerodynamic theory is now known and recognised all over the civilised world, and there is some cause for satisfaction in the fact that the modern aerofoil theory is frequently referred to as the " Lanchester- Prandtl Theory," even if it has, at the same time, to be admitted that scientific circles in Great Britain failed to appreciate the early work of Lanchester, so that it remained for Dr. Prandtl to carry out the work of elaborating and perfecting what was independently started by Mr. Lanchester. In the introduction to his Wilbur Wright lecture, Prof. Prandtl referred to the early history of the modern aerofoil theory, and pointed out that, although it was often taken for granted that he had found in Lanchester's early work the ideas upon which the theory was built up, this was not so, as the necessary ideas upon which to build up the theory had already occurred to him before seeing Lanchester s book. What had really happened was that Lanchester's treatment was difficult to follow, making a considerable demand on the reader's intuitive perception, and only because the - had in German - been working along similar lines were they able at once to grasp Lan- chester's meaning. Concerning later works by Lanchester, Dr. Prandtl made the interesting statement that " The Flying Machine " and " The Aerofoil and the Screw Pro- peller," published in 1915, remained unknown to the Germans until 1926. In these works Lanchester came to the same conclusions regarding induced drag as those reached independently by German workers. . On the occasion of the reading of the Wilbur Wright
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