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Aviation History
1926
1926 - 0817.PDF
Flight, November 11, 1926 CHT AIRCRAFTENGINEER- IR§HIPS 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. 933. (NO. 45, Vol. XVIII.) NOVEMBER 11, 1926 f W eekly, Price td.L Post free, 7d. l 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 abnormalconditions and to increases in postage rates. • Foreign subscriptions must be remitted in British currency. CONTENTS Editorial Comment PAGE Real Commercial Aviation 725 Small Three-Engined Aeroplanes 726 The Schneider Cup Race 726 The Coppa d'ltalia 727 " Cirrus Mark II " Engine 8 "Moth" Statistics 732 Air Ministry Notices ... 732 " From the Four Winds " 3 Hydrogen as Fuel 734 Light'Plane Club Doings 734 Surveying by Aeroplane 5 Eagle Aerial Camera 7 Personals 738 Royal Air Force 739 R.A.F. Intelligence 9 Correspondence 740 In Parliament 0 DIARY OF FORTHCOMING EVENTS Club Secretaries and others desirous of announcing the dates of important fixtures are invited to send particulars for inclusion in the following list:— 1926 Nov. 11 .... Schneider Cup Race at Norfolk, Virginia, U.S.A. Nov. 16 ... Mr. A. G. von Baumhauer, Sub-Director of the Government Aeronautical Laboratories, Amsterdam. " Some Notes on the Possi- bilities of Progress in Aviation," before Inst.Ae.E. Nov. 18 .... Mr. R. S. Capon. " Methods of Performance Testing and Analysis," before R.Ae.S. Nov. 21 .... Lecture, " Meteorology in the Service of Msn," by Dr. G. C. Simpson, C.B., at the Guild- house, Eccleston Square, S.W.I. Nov. 30 ...Mr. F. S. Barton, M.A., F.Inst.P. "Air Photography Apparatus," before Inst.Ae.E. Dec. 2 .... Mr. P. B. Bradshaw. " Alloy Steels for Aero Work," before R.Ae.S. Dec. 3-19 .... Paris Aero Show EDITORIAL COMMENT. HILE passenger air routes in Europe are struggling along by the aid of govern- ment subsidies, and this applies to Europe in general and not solely, nor particularly, to England, there is at least one branch of civil aviation which has so far managed to work out its own salvation, unaided by such artificial forms of encouragement as subsidies and grants and machines on the " hire-purchase system." Aerial Surveying, like other forms of aviation, „ ReaI . .has had its difficulties. In the. firstCommercial . ,, . , . , Aviation place the art, or science, whichever way one prefers to regard it, of aerial surveying, and more particularly surveying by means of aerial photography, has had to find its way. Experi- mental work of a considerable magnitude has had to be carried out. Special cameras have had to be evolved, and there still remains the rather difficult problem of making an exact allowance for the effect of uneven ground such as mountains and valleys, the former naturally appearing disproportionately large owing to the fact that they are nearer to the lens of the camera. However, it may be said that for all practical purposes these problems have been solved. When it is a question of an aerial photo- graphic survey over country already fairly accurately mapped by previous ground surveys, the height of hills and mountains will be known, and in such cases the correct allowance for " distortion," if one may so term the phenomenon, can be made. Over un- known country the same accuracy will not in general be required and experienced operators, working always in conjunction with ground surveyors, can now obtain really ^remarkable accuracy in this respect. It is, therefore, small wonder that aerial surveying has " caught on," to use a colloquialism, in the way it has. The work carried out by the Aerial Survey Company has demonstrated the enormous saving in time as compared with the older methods which air surveying can effect. Not only so, but by making use of aircraft under certain conditions, surveys B2
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