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Aviation History
1910
1910 - 0120.PDF
(p]GHf) struck by others, but, as we have explained, this in no way prevents the formation of a stream of uncertain depth being deflected indirectly by the propeller and without actual contact. This condition is illustrated diagrammatically in Fig. i, while the impossible state of affairs that would ensue were every particle of air to strike the face of the blade and to rebound therefrom is shown in Fig. 2, where the crossing of the paths of different filaments suggests how reasonable it is for nature to prefer the state represented in Fig. 1.—ED.] HOLLOW SPARS. L3S31 As I notice that some of your readers have lately been making inquiries about hollow spars, it may be of interest to state that my firm is, I believe, the only one in England which manufac tures these hollow spars for aeroplane work. At the Aero Show in March, 1909, I ex hibited samples of various sections, and found that they created a great amount of interest. (I enclose for your in- ' SECTION OF SPAR. spection a sample of one of my hollow icthyoidal strut sections.) I also showed there a length of silver spruce 30 It. long, perfectly straight-grained and flawless, and since then I have been informed that MM. Voisin Freres are now obtaining this timber from the same source as myself. Three and a half years ago I constructed my first glider of silver spruce, and I think this was the first time that this wood had ever been used in England for this or any other purpose. I am very glad to see that my friend, Mr. Linton Hope, who compares (in your issue of January 1st, 1910) small racing-boat work with that of aeroplane building, endorses my opinion of this material. T. W. K. CLARKE. m ® ® ® Index and Titk'Page for Vol. I. THE Index and Title-Page for Vol. I, January to December, 1909, of FLIGHT, has now been published. Any reader may obtain one by sending 2d. to the publishers, 44, St. Martin's Lane, London, W.C. After February 28th, a charge of 6d. post free will be made. POINTS TO NOTE. AT the recent Aviation Exhibition only one big prize was awarded, and that was secured by the F.I. AT Co. for their flight engine, which also receives the gold medals offered by the Minister of War and the Touring Club. THE N.E.C. aeroplane engine is steadily advancing in favour. Amongst the most recent aviators to place an order for one of the 35-40-h.p. engines are Messrs. A. V. Roe and Co. With this new engine they hope to make many prolonged flights on the type of aeroplane with which their name is associated, and with which they have already had such considerable success. THESimms Magneto Co., Ltd., have recently come to an arrange ment with Messrs. G. H. Smith and W. H. Dorey, who will in future act as their West-End agents. Messrs. Smith and Dorey will keep a stock of Simms magnetos, sparking plugs, spare parts, &c., &c., at their West-End house, from where the many users of these magnetos will be able to obtain supplies. MESSRS. HUMBER, LTD., have just issued their aeroplane catalogue, which gives illustrated details, both of the Humber monoplanes and biplanes, and also of the 20-h.p. 3-cylinder and the 50-h.p. 4-cylinder engines for flying machines. WE understand that the works of Messrs. A. V. Roe and Co. are now in full swing, and orders have been placed with all the leading engine makers—Greens, New Engine, and Jap—for engines for experimental purposes, with a view to making the aeroplanes produced by the firm still more efficient. As showing that the British product is not altogether despised abroad, it is interesting to know that the Aeroplane Supply Co. have just executed an order for a large quantity of British-made aluminium lugs for a Belgian finm. ® ® ® ® IMPORTS AND EXPORTS. Aeroplanes, airships, balloons and parts thereof (not shown separately before 1910). Imports.. I Exports. I Re-Exportation. Jan., 1910 ... £2,516 I Jan., 191c ... ^750 | Jan., 1910 ... £550 FEBRUARY 12, igto. DIARY OF FORTHCOMING EVENTS. British Events. Mar. n-19 July 11-17 Flight Exhibition at Olympia. Bournemouth Flight Meeting. 1910. Aug. 6-13 Flight Meeting, place not fixed. 1910. Feb. 6-13.. April 2-10 April 3-to April 10-25 May 10-16 May 14-22 May 20-30 June 5-12 June 5-15 June 18-24 Heliopolis. Biarritz. Cannes. Nice. Berlin. Lyons. Verona. Vichy. Budapest. St. Petersburg June 26-July 10 Rheims. Foreign Events. 1910. July 14-24 July 24-Aug Aug. 25-Sep Sept. 8-18 Sept. 24-Oct Oct. 18-25 Oct. 25-Nov Rheims to Brussels, cross country event. 10 Belgium. . 4 Deauville. Bordeaux. 3 Milan. America. Gordon-Bennett Balloon Race. 2 America. Gordon- Bennett Aeroplane Race. Aeronautical Patents Published. Applied for in 1009. Published February zoth, 1910. H. E. HUGHES. Kite. MOTORLUKTSCHIFF-STUDIEN GES. Sustaining planes for aeroplanes. 18.767. J. SCHILLING. Balloons, airships, &c. 18.768. L. LEVIN AND F. HURWITZ. Gas-bags of balloons and airships. 19,823. Soc. ANON. " ASTRA." Propulsion of airships. •>593-8,179. BACK NUMBERS OF "FLIGHT." SEVERAL back numbers are now very scarce, and have been raised in price as follows :— Price. s. d. No. 2, Jan. 9, containing Table of Propellers I 6 3 „ 16 ,, ,, Engines 3 o 4 ,,23 ,, Engines at Paris Salon .. 36 6, Feb. 6 „ " How Men Fly" 1 o Aeronautical Bibliography. Wright Bros.' Elevator Patents. 8 ,, 20 ,, Flying Ground at Fambridge 1 o Illustrated Glossary. Human Side of Flying ... I o Aero Club Ground at Shellbeach. Military Aeronautics. Souvenir Supplement ... I 6 Engines at Olympia ... ... 1 o Prize List ... ... ... 3 6 Models at Olympia. Bleriot Flyer 2 o (Full page drawing.) Other back numbers, post free, \\d. each (including descriptions and scale drawings of the Voisin, Curtiss, Cody and Farman biplanes, the Santos Dumont, Antoinette, and Grade monoplanes, and of a full-size Wright glider. BINDING COVERS for Vol. I, price zs. 3d., post free. TITLE PAGE and INDEX for Vol. I, 2d., post free. Now ready. Readers' own copies bound, price \s. per part (in cluding cover, title page, and index, but excluding postage). VOLUME I, bound complete with all the above scarce numbers, price 255., post free; in two parts, 285. 6d., complete. Ready shortly. Prices of special binding on application. 10, Mar. 6 15, Apr. 10 16 „ 17 31, July 31 FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone : 1828 Gerrard. SUBSCRIPTION RATES. FLIGHT will be forwarded, post fiee, to any part of the world at the following rates: — UNITED KINGDOM. ABROAD, 3 Months, Post Free 6 » »» " ». H s. d. ... 1 8 -33 ...66 3 Months, Post Free ... 6 H M 12 ., „ s. d. 2 6 5 0 10 0 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 ; otherwise no responsibility will be accepted. Il6
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