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Aviation History
1909
1909 - 0786.PDF
DECEMBER 4, 1909. propeller direct to the revolving cylinders without any intermediate driving-shaft ? Wishing your paper continued success. Yours faithfully, Wimbledon. B. BRUCE-WALKER. [Two advantages may be suggested in connection with the position of the propeller on the Gnome engine. It does not interfere with free access to the motor and the draught from it passes straight across the cylinder-heads, which are air-cooled.—En.] "GG. AND C.P." To the Editor of FLIGHT. SIR,—Having been constant readers of your valuable journal, FLIGHT, we take this opportunity of asking a few questions. Having had considerable trouble in getting the correct balance of some of our model aeroplanes, we should feel obliged if you could give us any method of locating the centres of gravity and pressure. Could any of your readers give us answers to the following questions with regard to the making of model aeroplanes :— 1. Which is the best way to construct the planes? 2. The best way of fixing together so as to be taken apart easily ? 3. The best way of designing a model propeller ? We remain, yours faithfully, "GRAVITY AND PRESSURE." [A method of locating the centre of gravity would be to balance the model on the end of a fine thread. In gliding flight, if the nose tips upwards then centre of pressure is in advance and vice versa.— En.] STRONGER PETROL TINS. To the Editor of FLIGHT. SIR,—Complaints have been voiced by motorists frequently of leaky petrol cans and consequent short measure. Considering the enormous numbar of spirit cans in use, we are of the opinion that the number of leaky cans is infinitesimal. We venture to suggest that if users would handle the cans with a little more care and consideration, it would help the importers and distributors very materially.. It is no infrequent occurrence for cans to be received back with the bottom seam twisted out of shape and rent open, this being the result of the practice of opening the faucet of one can with the bottom edge of another. This practice prevails to such an extent that for some time past for all our new cans we have adopted the method of strengthening the bottom seams by reinforcing same with a strip of stout metal, and other firms have also since seen the necessity of doing likewise. In regard to the question of short measure, if users could see the precautions that are taken by ourselves, as well as other distributors, by providing automatic filling machines, passed by the Inspector of Weights and Measures, they would feel, as we do, that every pre- caution that human ingenuity can at present devise has been adopted. We would also like to state that the practice of using motor spirit cans as storage receptacles for water, &c., from our experience seems to be largely on the increase, and a moment's reflection w?ll make it apparent how injurious is the practice of using cans for other than the purpose for which they are intended. Yours truly, ANGLO-AMERICAN OIL CO., LTD. FARMAN AND VOISIN MACHINES. To the Editor of FLIGHT. SIR,—With reference to your article, entitled " Mr. Farman and the Voisin Freres," I notice that Farman claims to have obtained his -first successes on a machine " qu'il avail complitement rctnanii ou fait remanier selon ses indications." (Revue AMenne). This is obviously at least very much exaggerated, as the " Dela- grange No. 1," which was ordered before the " Farman No. I," differs from the latter only by the "castor" or " orientable" arrangement of the wheels, and from the " Farman No. 1 bis" which won the circular kilom. prize) only by the former detail and the monoplane elevator. It was only later that Farman began the alterations which led to the present type. Hoping you will publish this, and excuse my occupying so much of your valuable time. Yours truly, H. D'ERLANOER. PUBLICATION RECEIVED. All the World's Airships (Aeroplanes and Dirigibles). By Fred T. Jane. First Annual Issue. London : Sampson Low, Marston and Co., Ltd. Price 2U. net. ® ® ® ® NEW COMPANIES REGISTERED. Aerial Flying Exhibition, Ltd., 4, London Wall Buildings. E.C.—Capital ,£32,000, in 30,000 preferential ordinary shares of £1 each and 40,000 deferred shares of is. each. Helicoplane Flying Machine, Ltd., 26, Shaftesbury Avenue, W.C.—Capital £5,250, in 5,000 ordinary shares of £1 each and 5,000 deferred shares of is. each. ® <& ®P ® Aeronautical Patents Published. Applied lor in 1008. Published Novemher 2$th, 190J. 23,798. I. E. MERCER. Aeriat machines. 24,682. J. L. GARSED. Aeroplanes, wings or gliders. BACK NUMBERS OF "FLIGHT." SEVERAL back numbers are now becoming very- scarce, and when exhausted no more complete sets will be procurable. The publishers have pleasure in announcing that they have secured a few of these back issues of FLIGHT, and any of our new readers who may wish for sets, No. i to date, except Nos. 2, 3, 4, 6, 8, io, 12, 15, and 16, but including the numbers containing full descrip- tion and Scale Drawings of the Bleriot, Curtiss, Voisin, and Cody biplanes, the Wright full-size glider, and of Santos Dumont's " Demoiselle" monoplane; can obtain same for 6s. nd., post free (abroad 8s. id.). Sets to date, including all the above and in addition the scarce higher-price numbers : Nos. 2, is. 6d.; 3, 3J.; 6, is. ; 8, is. ; 10, is.; 12, is. 6d. ; 15, is.; 16, 3s. bd.; and 31 (with scale drawings of the Bleriot cross- Channel flyer, 2s.), but exclusive of No. 4, which is now obtainable in bound volumes only at the end of the year, and otherwise out of print, can be obtained for 20s. yd., post free (abroad 22s. gd.) from the Publishers, 44, St. Martin's Lane, W.C. The publishers have only a limited reserve stock for bound volumes at end of year. Those wishing, there- fore, to ensure obtaining Volume I complete for year 1909—ready end of January—with Index and Title Page, can book same now at the price of 25*., bound in cloth boards. Orders will be booked for these in rotation as received. As various numbers become scarce the price will be raised accordingly. We have now been able to secure a very few copies of No. 16, and can supply same at 3*. 6d. each. Bleriot Number separately, 2s. FLIGHT. 44, ST. MARTIN'S LANK LONDON, W.C. Telegraphic address: Truditur, London. Telephone; i8a8Gerrard.SUBSCRIPTION RATES. FLIGHT will be forwarded, post fiee, to any part of the world at the following rates: — UNITED KINGDOM. ABROAD. s. d. 3 Months, Post Free 6 12 8 3 Months, Post Free. 6 s. d. 2 6 5 0 10 o NOTICE TO ADVERTISERS. In consequence of our rapidly increasing circulation, the latest time for reserving change of " copy'' is first post TUESDAY morning. Copy however can be accepted as late as first post Thursday morning, but without proof. NO ALTERATIONS can be made after 1O a.m. THURSDAYS. 788
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