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Aviation History
1913
1913 - 0452.PDF
[/OGHT] CORRESPONDENCE:. High Speed Birds. [1754] I am very much obliged to Mr. Mc<,'ueeny for his reply to my query on high-speed birds. Could he let me know, through the medium of your valuable paper, how these speeds are estimated ? Also how long it is possible for the birds to maintain these speeds? Brook Green. A. H. FORD MOOKE. Aeronautical Engines. ['755] I nave rea(i w>tn a g°od deal of interest the articles appearing in your journal upon aeronautical engines, particularly that portion appearing in your issue ot March 15th. It is refreshing to find articles on internal combustion engines where the writer is really well acquainted with the subject. There is, however, one remark of the author of these articles which I should like to comment upon, viz., that implying that water cooling is impossible with rotary cylinder engines. I would point out that all radial rotary cylinder engines might be provided with a thin copper hollow-ribbed jacket containing only a relatively thin film of water, say ^-inch thick, surrounding the cylinder walls, each such copper jacket could 1* connected at the inner end to the jacket of the next cylinder, and so on round all the cylinders. Indeed so small an amount of water may be carried as to render the question of weight increase negligible. This film of water in the jackets so connected does not need any other or further supply, would act perfectly as a water cooler by centrifugal action, inasmuch as the water would circulate effectively centrifu- gally without the assistance of a pump, the water at the outer or hotter ends of each cylinder would become most heated, and therefore would be relatively lighter than the water at the inner end of each jacket, and in the connecting pipes from jacket to jacket. Consequently, the water in the outer or cover ends of each jacket would always, immediately it became heated, tend to move toward the centre, while that water nearer the centre, which would be relatively cooler, would tend to move outwardly to the ends of the jacket to replace the heated water. Consequently, by centrifugal action alone, a continuous circulation in this thin film of water could be maintained, so providing that increased power and reliability in the rotary cylinder engine which is so desirable, and in which the air-cooled cylinder is at present so deficient. Moreover, by keeping the cylinders cooler, not only a greater power could be obtained, but probably only one-fifth of the lubri cating oil at present used would be necessary, further increasing the life of the engine. It will be obvious to anyone who thinks about it, that the centri fugal action referred to will be precisely simiiar relatively to the centre of each engine, as the thermo-syphon action acting by con vection relatively to gravity on automobile engines. April 10th. J. D. ROOTS. Streamline Bodies. 1756I Might I suggest to those gentlemen who have recently been engaged in filling the columns of FLIGHT with somewhat acri monious discussion as\o the respective merits and demerits of pointed and blunt entries, that they turn to FLIGHT, Vol. IV, (1912), pp. 545, ,-t se,/., and 712. Primed with a few of the facts mentioned therein, perhaps thty will favour us with a.little more plausible reasoning and rather fewer unconvincing analogies than has in the past been the case. JAMES E. REID. W. Norwood. ® ® ® ® A Fatal Mishap at Eastchurch. BY the unfortunate mischance which cost Paymaster E. R. Berne his life, at Eastchurch, on Monday, the Naval Wing of the Royal Flying Corps has lost a very fine flyer. He was standing in front of a tiactor biplane talking to the pilot, Lieut. Wildman Lushington, when the machine ran forward. It knocked the unfortunate man down, and his legs were so injured by the propeller that he died from hemorrhage and shock two and a half hours after the accident. Capt. Penfold at Croydon. IN no wise daunted by the strong westerly wind on Saturday last, Capt. Penfold, the Australian aeronaut, made a successful balloon ascent from the Croydon Football Grounds in the O.T. Ulloon. Holding on to the trapeze by his hands, Capt. Penfold was carried up 4,000 ft., performing some trapeze feats meanwhile. He then parted company with the gas-bag and the parachute carried him to Norwood. The balloon was retrieved by a party of Boy Scouts near Elmers End. APRIL 26, 1913. AIRSHIP NEWS. The French Rigid Airship "Spiess." . ...;. ^MJ AT last, after many postponements, the trench rigid airship " Spiess " has emerged into the open air, and on Thursday afternoon of last week the great dirigible, which is 340 feet long,^ was very' carefully piloted over a few circuits of the ground at St. Cyr. The airship is fitted with two six-cylinder Chenu motors of 1,800-h.p., each driving two 18-ft. propellers. The cubic capacity of the airship, the framework of which is made of wood, is 35>°°o cubic feet. Long Cruise by Italian Dirigible. THE Italian military dirigible, P5, made a splendid trip of 450 kiloms. on Sunday morning. Leaving Vigna-di-Valle, close to Bracciano, at 5.40 a.m., she went to the airship station at Bosco- mantico, close to Verona, arriving at 2.55 p.m. During the trip the airship attained a height of 1,700 metres, in order to traverse the crest of the Apennines. An Airship Over the Vatican. ON the 17th inst., His Holiness the Pope had a splendid view of an Italian dirigible, which cruised over the Vatican for some time. The officers on board waved their handkerchiefs and flags, and their salutations were acknowledged by the Pope. Fine Voyage by LI. ON Monday, the German Naval Zeppelin cruiser Li started from Johannisthal at a quarter past eight, and without incident was safely docked at Hamburg at 5.13 in the afternoon. © ® ® ® Messrs. Bonn and Co.'s Extensions. MESSRS. BONN AND CO., LTD., of 97, New Oxford Street, wish to make it quite clear to our readers that they have no intention of vacating their present premises as above, but owing to the great increase of their business they are compelled to seek lurther accom modation. ® ® ® ® MODEL CLUB DIARY AND REPORTS. CLUB reports of chief work done will be published monthly for the future. Secretaries' reports, to be included, must reach the Editoi on the last Monday in each month. S. Eastern Model Ae.C. (I, RAILWAY APPROACH, BROCKLKY). DURING this week-end flying will take place at Woolwich Common, Black heath, Lee and Mitcham as usual. On Monday, Wednesday and Friday evenings of next week flying experiments will be conducted until dusk. ® ® ® ® NEW COMPANIES REGISTERED. British Airship Development Synd., Ltd.—Capital ^5,000, in £1 shares. English Boerner Aerial Synd., Ltd., Blomfield House, 85, London Wall, E.C.—Capital £5,000, in 4,700 ordinary shares of £1 each and 6,000 deferred shares of is. each. Acquiring an option in relation to the Boerner type of airships. ® ® ® & Aeronautical Patents Published. Applied for In i»i:t Published April 241/1, 1913. 984. T. D. GREER. Stabilizers for flying machines. 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. 3 Months, Post Free . 6 » u 12 „ s. d. 3 9 7 6 15 o 3 Months, Post Free .. 0 » » V> 12 », » s. d. 5 0 10 0 20 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 County and Westminster Bank, 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. 474
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