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Aviation History
1911
1911 - 0190.PDF
[/UGHT] I varied the dihedral angle of the model I took care to restore its fore and aft balance (not stability) by adjusting distance between main plane and elevator. Assuming the above facts to be correct, is there any method of arriving at the value of the fore and aft dihedral angle which will produce maximum speed with maximum stability ? I should also like to know how far the A.S.L. have experi mented in this direction. Westcliff-on-Sea. " UNFLEDGED." [Our correspondent's symbolical reference is apparently to a Bleriot type monoplane but the type does not seriously affect the principle involved, which is that the longitudinal dihedral is necessarily a source of increased resistance because both planes cannot be equally efficient. The less the dihedral, therefore, the higher the speed, so the problem resolves itself into a question of what is the least dihedral that will provide the desired amount of stability. Stability is, after all, very much a relative matter and what would suit one may be deemed inadequate by another. We are not aware of any definite results of experiments in this direction with the Valkyrie monoplane.—ED.] Model Cody Biplane. [1097] I have pleasure in enclosing a photo of a model of Mr. S. F. Cody's aeroplane. It is built to scale £ in. to I ft., from drawings published in your journal November 12th, 1910. The framework is made of white pine, and braced with strong thread. Wandsworth. F. FISHER. Model Construction. [1098] Perhaps some reader would kindly answer a few questions for mc through your valuable journal—(1) What size propeller should I have to drive a monoplane 3 ft. in length by 30 ins. across main planes, the area being 279 sq. ins. ? (2) what size elastic should I require ? (3) what is the best way to fasten the propeller on to a bicycle spoke ? West Clandon. F. G. NEWMAN. Shipping a "Bristol" biplane to Straits Settlements in the Far East per steamship "Glenstree," Glen Line (McGregor, Gow and Co.). Ltd.—We announced recently that amongst other shipments this machine had been despatched. MARCH 4, 1911. RECORDS. Duration.—Henry Farman (France), at Etampes, on a Henry Farman biplane fitted with a Gnome motor: 8 hrs. 12 mins., covering 463 kiloms. (288| miles) Distance.—Maurice Tabuteau (France), at Buc, on a Maurice Farman biplane, 584-935 kiloms. (365 miles) in 7I1. 48m. 3i|s. Altitude.—G. Legagneux, at Pau, on a Bleriot monoplane, fitted with Gnome motor, 3,200 metres (10,746 ft.). Speed.—A. Leblanc (France), on a Bleriot monoplane, fitted with Gnome motor, 5 kiloms. in 2 mins. 45^ sees. = 108 k.p.h. (67-5 m.p.h.). ® ® ® ® PUBLICATIONS RECEIVED. Advisory Committee for Aeronautics. Reports and Memoranda, No. 19. Report on the Theory of a Stream Line past a Plane Barrier. By Sir G. Greenhill. London: Wyman and Sons, Ltd. Price 5^. Catalogue. Model and Full Sise Aeroplanes, Engines, and Accessories. S. Summerfield, Sherrard Street, Melton Mowbray. Price T,d. ® ® ® ® Aeronautical Patent Published. Applied for in 1910. Published March 2nd, 1911. 3,394. J. W. SEDDON. Device for ascertaining velocity of wind. "FLIGHT" ART PAPER EDITION. IN response to numerous requests, the publishers of FLIGHT have arranged to print a limited number of copies each week upon art paper, thereby enabling the high quality of the illustrations and matter to be fully appreciated. These can only be supplied by subscription, the annual charge, post free, being : United Kingdom, 15^. ; Abroad, 20s. Present subscribers can secure these copies by paying the difference pro rata of their unexpired subscriptions. Application should be made to the PUBLISHER, 44, ST. MARTIN'S LANE, W.C. Mar. 24 July 22 July 28 Oct. 31 Mar. 8 Mar. 8 Mar. 8 Mar. 10 DIARY OF COMING EVENTS. British General Events. -April 1 Olympia Aero Show. .. Daily Mail Round England Contest. .. Gordon-Bennett Aviation Cup Contest. .. Clo»e of British Michelin Cup. British Clubs and Associations. .. "Some Lessons of 1910." By Major J. N. C. Kennedy at Caxton House (A.A. and M.U.). .. "Problems Re.ating to Aircraft." By Mervyn O'Gorman at Institute Automobile Engineers. .. "Vertical Flight and Reduced H.P." By Joseph Clarkson at Merchant Venturers' Technical College, Bristol. .. Lecture by Mr. S. F. Cody (Midland Ae C). PRINCIPAL CONTENTS. "° S4 Invention versus Achievement .. .. .. .. .. .. .. 174 Portrait (Lieut. D. G. Conner) .. .. .. .. .. .. .. 175 The Sanders Biplane .. .. .. .. .. .. .. .. .. 176 Dropping Explosives in Aerial Warfare .. .. . 178 The Army and Aeronautics Royal Aero Club Notes Progress of Flight About the Country British Notes of the Week From the British Flying Grounds .. Foreign Aviation News Two-Thirds Power Law Paper Models 188 Correspondence 190 FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone: 1828 Gerrard. SUBSCRIPTION RATES. FLIGHT will be forwarded, post free, to any part of the world at the following rates:— UNITED KINGDOM. 3 Months, Post Free 6 „ s. d. ABROAD. 3 Months, Post Free .. 6 „ s. d. 2 9 5 6 Cheques and Post Office Orders should be made payable to the Proprietors of FLIGHT, 44, St. Martin's Lane, W.C., and crossed London and County Bank, othei wise no responsibility will be accepted. Should any difficulty be experienced in procuring FLIGHT from local newsvendors, intending readers can obtain each issue direct 'rem the Publishing Office, by forwarding remittance as above. 192
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