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Aviation History
1912
1912 - 1156.PDF
A1K> assuming Mr. Williams to be correct, what would be the s|ieed of the machine, in the calm, supposing the engine were left running ? . Truly, as the writer of the original article remarks, mechanics are apt to become elusive when seen through the mysterious glamour oi Bigllt. Uolverhampton. W. H. MARSH. 1688] I do notfollow Mr. C. Parry Williams in letter 1664. In the experiment described by me, the condition of the air becoming calm suddenly is reproduced, so far as the dummy areoplane is concerned, l>y the belt being drawn suddenly away from the dummy. It is, of course, impossible suddenly to stop the belt, and this difficulty is overcome by suddenly withdrawing the belt, which is equivalent to suddenly removing the " air " resistance— i.e., instituting a sudden calm. Purley. H. E. VON HOLTORI'. inventors and the Aeroplane Industry. [1689] I venture to refer to my early experiments, a brief account of which was published in FLIGHT of June 24th, 1911, and to mention that I believe I hold effective patents covering means for preventing the drag of wing warping occurring on the depressed side of the machine, which tends to promote side-slip under some circumstances at present. I wish to say that, being desirous of avoiding entering into agreements with monopolists who might, by the purchase of my inventions, actually prevent the latter, by means of high royalties, from coming into general use for some time at least, and assuming and believing that the ideas involved will be found to have some value in the evolution of the safe aeroplane, I wish to deliberately tie my own hands by offering the use of any or all of my present or future inventions in any country in which they have been or will be patented at the uniform royalty of ^JO per aeroplane in advance or .£20 in arrears, provided that the latter extra charge shall not come into operation till January 1st, 1913. In order to encourage experiments with models, which I look on as very important, and from which I gained much of the information I have acquired, I am willing to reduce the royalty to one shilling in advance and two shillings in arrears. Considering my expenditure of time and money up to date, and the fact that I am continuing to spend money and to devote all my spare time to the work, I could hardly be expected to offer my patents at smaller royalties. In making this offer I believe myself to be acting in the liest interests of the industry. Whether in so doing I am acting in my own best interests I am doubtful, but this is a side issue, which lime alone can decide. I prefer to play the game with all the cards on the table and I presume that manufacturers have the same pre ference. If other inventors will be content to offer their inventions to the public at low royalties, instead of aiming at becoming suddenly enriched by the offers of monopolists, they will .help forward the rapid evolution of the safe aeroplane and the extension of the industry, and if the industry is to prosper the reason ably safe aeroplane must be produced as speedily as possible. In this way each invention will stand or fall on its merits, and the undesirable complications often introduced by the formation of companies and monopolies will be avoided. I am aware that in publishing this letter I lay myself open to the possible accusation of seeking an advertisement for my own wares, and I am at a loss to know how to answer this except to say that my intention is to offer the result of my work to the industry on the easiest possible terms, with the object of helping forward a science in which I am keenly interested, and of saving any unnecessary sacritice of life if I possibly can. The patents already acquired by me are numbers 6642, 11334 and 23645 of 1910 in England, 428925 of 1911 in France, and 220 of 191I in India, and applications have been made in Germany and the United States. The more important claims are :— (I) Balancing planes, which lie normally in the direction of flight and in such position that their efficiency will not appreciably lie interfered with by the main planes, worked independently and so that their angle of incidence is always below and never above the direction of flight. (a) Automatic lateral balancing planes situated on both sides of an aeroplane and having their outer edges rigid and the planes lieing otherwise flexible or movable in both upward and downward direction to R limited extent. (3) In an aeroplane haying wings with tips trailing towards the rear of the machine, vertical rudders placed at or near the wing tips. AIRSHIP NEWS. "Victoria Louise" Out of Commission. THE Zeppelin liner " Victoria Louise made her last voyage of the year on Saturday, and it is stated that it was the 225th trip she has made since being put into service. Her last cruise was of four hours' duration, in the course of which an altitude of 1,100 metres was reached. With the Italian Airships. „...,_ . _ . . Two of the Italian military dirigible-, Pi and P4, were flying over Lake Eracciano on the 28th ult., the former carrying out some bomb-dropping tests over the military ground at Vigna di Valle. The other dirigible was being tested for altitude, and in the first trial got up to 800 metres, but nearly doubled this in the second attempt, when the height attained was 1,500 metres. ® ® ® ® Italy's List of Aviators. A LIST just published shows that Italy has now 175 certificated pilot-aviators, so that she ranks fourth among the European countries, following-after France, Great Britain and Germany. Hydro'Aeroplane Station at Calais. CALAIS should soon be very well equipped to accommodate aerial visitors, as the Mayor has now received from the French Government Department of Bridges and Roads authority to proceed with the installation of a station for aero-marins or hydro aeroplanes. ® ® ® ® PUBLICATIONS RECEIVED. The "Daily News and Leader" Year-Book, 1913. London : The Daily News and Leader. Price 6d. net. La Theorie de VAviation; son application a VAeroplane. By Robert Gastou. Paris: F. Louis Vivien, 48, rue des Ecoles. Price 1 fr. 50. Vol de VAeroplane en Hautier. By Commandant Faraud. Paris: F. Louis Vivien, 48, rue des Ecoles. Price I fr. The Boys' Book of Aeroplanes. By T. O'B. Hubbard and C. C. Turner. London : Grant Richards, Ltd. Price 6*. Famous Airmen and their Equipments. Burroughs, Wellcome and Co., London, E.C. The Dash for Winter Sports. By Harry Maitland. London : John Ouseley, Ltd., Fleet Lane, E.C. Price zs. 6d. net. The " Wellcome" Photographic Exposure Record and Diary, 1913. London : Burroughs, Wellcome and Co., E.C. Catalogue. Model Aeroplane Accessories and Materials. J. Bonn and Co., Ltd., 97, New Oxford Street, London, W.C. Price zd. ® ® ® ® Aeronautical Patents Published. Applied for In ion. Published December 5th, 1912. 25,024. L. B. GOLDMAN. Aerial machines. 25.363- F. W. WILES, T. MACLEOD AND W. F. WILES. Aeroplane. s5.a95- A- C. M. AND J. G. J. MEUGNIOT. Aerial machines. Applied Tor In 1812. Pubtished December sthi 1012. 2,754. Soc. ANON. ASTRA. Dirigible balloons. 9,479. N. B. CONVERSE. Balancing device. 11,102. M. F. SUETER, F. L. M. BOOTHBY AND N. G. PATERSON. Aeroplanes. Meerut, India, November 13th, 1912. H. S. WiLDEBLOon, M.I.C.E., Indian Public Works. 1156 FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address : Truditur, London. Telephone : 1828 Gerrard. SUBSCRIPTION RATES. FLIGHT will be forwarded, post free, at the following rates :— UNITED KINGDOM. ABROAD. J. d. s. d. 3 9 3 Months, Post Free ... 50 7 6 6,, „ ... 10 o " IS ° 12 „ „ ... 20 o Cheques and Post Office Orders should be made payable to the Proprietors of FLIGHT, 44, St. Martin's Lane, W.C., and crossed London County and Westminster Bank, otheiwise no responsibility •mill 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. 3 Months, Post Free . 6 » >) 12
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