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Aviation History
1911
1911 - 0878.PDF
gugjg; I enclose photos of the experimental model which has proved itself to possess this stability invariably. Its normal flight is 250 yards in 40 sees. The central plane, to the shape of which I attribute the wonderful lateral stability, is situated just over the centre of gravity. The diamond shaped box plane is, of course, nothing new, having been applied to kites for years as the feature of their stability ; the wonder is that no aviator—so far as I know—has tried it on a large flyer. It is fitted with two adjusttble longitudinal stabilizers, right orward and att und r the rear large plane. I append details in case you care to publish them :—Length of frame, 33 ins. ; width of fra rie, 8 ins. ; material, £ in. hickory ; rear plane (pi<no wire and silt), 33 ins. by 5J ins. ; centre p'ane (steel and aluminium ribbing), 27 ins. by 4 ins. ; diamond box plane, 7 ins. across; foiward stabilizing plane, 18 ins. by 3 ins. ; rear stabilizing plane, 12 ins. by 2^ ins. ; all planes cambered ; twin propellers, 9 ins. " aerospeeds," each driven by ij ozs of elastic, divided into three separate skeins for each propeller by means of Melcomb's trip e intergearing, giving 850 turns ior each propeller ; total weght of model all on, 124 ozs. Downham Market. (REV.) HAROLD KELK. The Limit of Long-Distance Flyers Propelled by Elastic. [1385] In his letter enti ltd " The Limit of Long-Distance Flyers Propelled by Elastic," Mr. G. T. R. Hill, who is of course well known in connection with model flying, would seem to make an attack on the u-e of rubber as a motive power for models. Moreover, he describes all machines driven by elastic as " flying sticks," a term which has hitherto been Solely applied to models designed for the sole o'ject of winning competitions, without any consideration of symmetrical and rational design. Mr. Hill seriously slaies at the outset of his letter that the power of a thick rubber motor is not necessarily greater than that of one containing a smaller number of strands. Has he ever tested, by means of a dynamometer, the contrast between the power of six and twelve strands of J in. strip rubber used on 30 in. fuselages? Of course, whether this extra power is used efficiently is beside the point, but the fact remains that it is there, and, if wasted, reflects little credit on the designer. Does Mr. Hill seriously mean to assert that " a large pitch propeller will not develop as much power as a smaller pitch propeller ? " If so, why are so many designers of fall sized machines fitting geared-down propellers, with much better results than formerly ? I quite agree with Mr. Hill that, unless checked in the interests of the safety of the unoffending general public, " the flying-stick of the future (as of the present) will be large propellered and fitted with enormous skeins of elastic," but of course it will not be an aero-model, but merely a flying-stick. Perhaps Mr. Hill is prepared to show me a half-mile flight with OCTOBER 7, 1911. his power-driven scale model. In the meantime I am inclined to the view that "there is nothing like rubber !" Surbiton. R. F. MANN. Tail Mounting. [1386] Replying to letter 1086, the enclosed sketch shows the method of mounting a biplane tail by brackets made from strip aluminium ^5 in. thick by T35 in. wide. Oldham. B. S. HIRST. ® ® ® ® PUBLICATIONS REChiVED. "Gabardine in Peace ana War." London: Burberry's, Hay- market. The Romance of Aeronautics. By Charles C. Turner. London : Seeley, Service and Co., Ltd., 38, Great Russell Street, W.C. Price $s. net. The Emyclofiadia oj Sports and Games. Edited by the Earl of Suffilk aid Berkshire. Vol. iv. Rackets—Zebra. London: William Heinemann. ® ® ® ® Aeronautical Patents Published. Applied for in 19to. Put'liihed October sth, 1911. Flying machines. Applied f r in 1911. Pwlished October $th, 1911. E. G. STAKK. Aerial car. L. s. CUNNINGHAM. FUing machines T. J. G. VAN EVKKDINGEN. Propulsion ot aerial machines. 30,210. J. E. BISSBLL. 5,953-6,657. 8,339- PRINCIPAL CONTENTS. PAGE Editorial Comment .. 860 The Aeroplane in War. After ihe Circ it of Britain. Flight Pioneers. LUut. C. K\. Samson, R.N 861 The Nieup Tt Two-seater Monoplane .. .. .. .. .. £62 A Study of Bird Flight. By Dr E. H. Hankin, M.A., D.Sc 864 The Average Weather ot" October .. .. .. .. .. .. .. 866 Aeronautical Fngi leerf g at the Northampton Institute .. .. .. 866 Royal Aero Club Nou s 867 Progress. f FH ht About the Country .. .. 86 School Aero Club Notes 8 British Notes ol the Week 869 From the British Flying Grounds 870 Air Eddies. By Oiseau Bleu .. .. .. .. .. 873 Science and the Aeronautical Engineer. By L. Bern. Desbleds .. .. 874 Bristol Fl ing School .. . . .. 875 French Militan Competitions 876 The Quentin-Bauchi,rt Prize.. .. .. .. .. 87 Foreign Aviation News _ .. 877 Correspondence _ .878 FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone: 1828 Gerrarr! SUBSCRIPTION RATES. FLIGHT will be forwarded, post free, to any fart of the world at the following rates:— UNITED KINGDOM. ABROAD. s. d. 3 Months, 6 „ 12 „ Post Free 3 Months, Post Free 6 i» >» 12 „ s. 2 5 11 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 Batik, otherwise no responsibility will be accepted Should any difficulty be experienced in procuring FLIGHT from local newsvendors, intending readers can obtain each issue direct from the Publishing Office, by forwarding remittance as above. 880
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